Country-to-country dialing walkthroughs
These examples use X placeholders or reserved fictional-use patterns, not private subscriber numbers. The + version is the portable format to save in contacts; the digits-only version shows how the same destination can look when the origin network requires an international prefix.
How to call United Kingdom from United States
Origin access: 011
- 1Start with country code +44 for United Kingdom.
- 2Remove the national prefix 0 before adding +44. The 0 is not part of the national significant number in international format.
- 3Use + on a mobile, or replace + with 011 when the origin network requires digits.
Destination mobile
- Domestic
- 07700 900XXX
- Mobile / saved contact
- +44 7700 900XXX
- From United States
- 011 44 7700 900XXX
Destination landline
- Domestic
- 020 7946 XXXX
- Mobile / saved contact
- +44 20 7946 XXXX
- From United States
- 011 44 20 7946 XXXX
Use +44 from a mobile or saved contact. On a US line that requires an all-digit international access code, replace + with 011.
Open full walkthroughHow to call United States from United Kingdom
Origin access: 00
- 1Start with country code +1 for United States.
- 2There is no separate domestic trunk digit to remove. The digit 1 may be used before the ten-digit number for long-distance dialling, but it is also the shared country code in international notation.
- 3Use + on a mobile, or replace + with 00 when the origin network requires digits.
Destination mobile
- Domestic
- (202) 555-01XX
- Mobile / saved contact
- +1 202 555 01XX
- From United Kingdom
- 00 1 202 555 01XX
Destination landline
- Domestic
- (212) 555-01XX
- Mobile / saved contact
- +1 212 555 01XX
- From United Kingdom
- 00 1 212 555 01XX
Use +1 from a mobile or saved contact. A UK line that requires digits uses 00 before the shared +1 country code and the full ten-digit NANP number.
Open full walkthroughHow to call China from United States
Origin access: 011
- 1Start with country code +86 for China.
- 2Remove the domestic 0 from a fixed-line area code before adding +86. Mobile numbers do not use that fixed-line trunk 0.
- 3Use + on a mobile, or replace + with 011 when the origin network requires digits.
Destination mobile
- Domestic
- 1XX XXXX XXXX
- Mobile / saved contact
- +86 1XX XXXX XXXX
- From United States
- 011 86 1XX XXXX XXXX
Destination landline
- Domestic
- 010 XXXXXXXX
- Mobile / saved contact
- +86 10 XXXXXXXX
- From United States
- 011 86 10 XXXXXXXX
Use +86 for a saved mainland China contact. From a US line that requires digits, use 011 86; remove the fixed-line area-code 0, but keep an eleven-digit mobile beginning with 1 intact.
Open full walkthroughHow to call Japan from United States
Origin access: 011
- 1Start with country code +81 for Japan.
- 2Remove the first domestic 0 before adding +81.
- 3Use + on a mobile, or replace + with 011 when the origin network requires digits.
Destination mobile
- Domestic
- 090 XXXX XXXX
- Mobile / saved contact
- +81 90 XXXX XXXX
- From United States
- 011 81 90 XXXX XXXX
Destination landline
- Domestic
- 03 XXXX XXXX
- Mobile / saved contact
- +81 3 XXXX XXXX
- From United States
- 011 81 3 XXXX XXXX
Use +81 for a saved Japanese contact. From a US line that requires digits, use 011 81 and remove the Japanese domestic leading 0 from both mobile and geographic numbers.
Open full walkthroughHow to call Italy from Germany
Origin access: 00
- 1Start with country code +39 for Italy.
- 2Retain the leading 0 on geographic numbers after +39. It is part of the Italian national significant number, not a removable trunk prefix.
- 3Use + on a mobile, or replace + with 00 when the origin network requires digits.
Destination mobile
- Domestic
- 3XX XXX XXXX
- Mobile / saved contact
- +39 3XX XXX XXXX
- From Germany
- 00 39 3XX XXX XXXX
Destination landline
- Domestic
- 06 XXXXXXXX
- Mobile / saved contact
- +39 06 XXXXXXXX
- From Germany
- 00 39 06 XXXXXXXX
The German origin prefix is 00, but the Italian destination rule still applies: retain the leading 0 on an Italian geographic number after +39.
Open full walkthroughHow to call Italy from United States
Origin access: 011
- 1Start with country code +39 for Italy.
- 2Retain the leading 0 on geographic numbers after +39. It is part of the Italian national significant number, not a removable trunk prefix.
- 3Use + on a mobile, or replace + with 011 when the origin network requires digits.
Destination mobile
- Domestic
- 3XX XXX XXXX
- Mobile / saved contact
- +39 3XX XXX XXXX
- From United States
- 011 39 3XX XXX XXXX
Destination landline
- Domestic
- 06 XXXXXXXX
- Mobile / saved contact
- +39 06 XXXXXXXX
- From United States
- 011 39 06 XXXXXXXX
Use +39 for a saved Italian contact. From a US line that requires digits, use 011 39; retain the leading 0 on an Italian geographic number, while mobile numbers begin with 3 without an added 0.
Open full walkthroughHow to call Singapore from Australia
Origin access: 0011
- 1Start with country code +65 for Singapore.
- 2There is no domestic trunk prefix to remove from ordinary eight-digit numbers.
- 3Use + on a mobile, or replace + with 0011 when the origin network requires digits.
Destination mobile
- Domestic
- 8XXX XXXX
- Mobile / saved contact
- +65 8XXX XXXX
- From Australia
- 0011 65 8XXX XXXX
Destination landline
- Domestic
- 6XXX XXXX
- Mobile / saved contact
- +65 6XXX XXXX
- From Australia
- 0011 65 6XXX XXXX
Singapore ordinary mobile and fixed-line numbers have eight digits and no trunk 0. Australia commonly uses 0011 when + is not available.
Open full walkthroughHow to call Japan from Singapore
Origin access: 001
- 1Start with country code +81 for Japan.
- 2Remove the first domestic 0 before adding +81.
- 3Use + on a mobile, or replace + with 001 when the origin network requires digits.
Destination mobile
- Domestic
- 090 XXXX XXXX
- Mobile / saved contact
- +81 90 XXXX XXXX
- From Singapore
- 001 81 90 XXXX XXXX
Destination landline
- Domestic
- 03 XXXX XXXX
- Mobile / saved contact
- +81 3 XXXX XXXX
- From Singapore
- 001 81 3 XXXX XXXX
Use +81 for a saved Japanese contact. From a Singapore line that requires digits, use 001 81 and remove the Japanese domestic 0 before the rest of the number.
Open full walkthroughHow to call United States from Brazil
Origin access: 00
- 1Start with country code +1 for United States.
- 2There is no separate domestic trunk digit to remove. The digit 1 may be used before the ten-digit number for long-distance dialling, but it is also the shared country code in international notation.
- 3Use + on a mobile, or replace + with 00 when the origin network requires digits.
Destination mobile
- Domestic
- (202) 555-01XX
- Mobile / saved contact
- +1 202 555 01XX
- From Brazil
- 00 1 202 555 01XX
Destination landline
- Domestic
- (212) 555-01XX
- Mobile / saved contact
- +1 212 555 01XX
- From Brazil
- 00 1 212 555 01XX
From Brazil, the international prefix is 00. A two-digit carrier-selection code can be added after 00 to choose the carrier for this call (00 XX 1 …), but Anatel’s numbering rules also allow the call without it. The carrier code belongs to this call’s access string, not to the stored +1 destination number.
Open full walkthroughHow to call India from United States
Origin access: 011
- 1Start with country code +91 for India.
- 2Remove a domestic trunk 0 before a fixed-line area code. Do not add a 0 before a ten-digit mobile number in international format.
- 3Use + on a mobile, or replace + with 011 when the origin network requires digits.
Destination mobile
- Domestic
- 9XXX XXX XXX
- Mobile / saved contact
- +91 9XXX XXX XXX
- From United States
- 011 91 9XXX XXX XXX
Destination landline
- Domestic
- 011 XXXXXXXX
- Mobile / saved contact
- +91 11 XXXXXXXX
- From United States
- 011 91 11 XXXXXXXX
Use +91 for a saved Indian contact. When a US-origin network requires digits, use 011 before 91 and omit the Indian domestic trunk 0 from a fixed-line pattern.
Open full walkthroughHow to call Australia from United States
Origin access: 011
- 1Start with country code +61 for Australia.
- 2Remove the leading domestic 0 before adding +61.
- 3Use + on a mobile, or replace + with 011 when the origin network requires digits.
Destination mobile
- Domestic
- 04XX XXX XXX
- Mobile / saved contact
- +61 4XX XXX XXX
- From United States
- 011 61 4XX XXX XXX
Destination landline
- Domestic
- 02 XXXX XXXX
- Mobile / saved contact
- +61 2 XXXX XXXX
- From United States
- 011 61 2 XXXX XXXX
Use +61 from a mobile or saved contact. From a US line that requires digits, replace + with 011 and remove Australia's domestic trunk 0.
Open full walkthroughHow to call Germany from United States
Origin access: 011
- 1Start with country code +49 for Germany.
- 2Remove the leading domestic 0 before adding +49.
- 3Use + on a mobile, or replace + with 011 when the origin network requires digits.
Destination mobile
- Domestic
- 015X XXXXXXXX
- Mobile / saved contact
- +49 15X XXXXXXXX
- From United States
- 011 49 15X XXXXXXXX
Destination landline
- Domestic
- 030 XXXXXXXX
- Mobile / saved contact
- +49 30 XXXXXXXX
- From United States
- 011 49 30 XXXXXXXX
Use +49 for a portable German contact. A US-origin fixed line can use 011 49, followed by the German national number without its domestic trunk 0.
Open full walkthroughHow to call United Arab Emirates from United States
Origin access: 011
- 1Start with country code +971 for United Arab Emirates.
- 2Remove the leading domestic 0 before adding +971.
- 3Use + on a mobile, or replace + with 011 when the origin network requires digits.
Destination mobile
- Domestic
- 050 XXX XXXX
- Mobile / saved contact
- +971 50 XXX XXXX
- From United States
- 011 971 50 XXX XXXX
Destination landline
- Domestic
- 04 XXX XXXX
- Mobile / saved contact
- +971 4 XXX XXXX
- From United States
- 011 971 4 XXX XXXX
Use +971 for a saved UAE contact. From a US line that requires digits, use 011 971 and remove the UAE domestic leading 0 while retaining the remaining emirate or mobile prefix digits.
Open full walkthroughHow to call India from United Kingdom
Origin access: 00
- 1Start with country code +91 for India.
- 2Remove a domestic trunk 0 before a fixed-line area code. Do not add a 0 before a ten-digit mobile number in international format.
- 3Use + on a mobile, or replace + with 00 when the origin network requires digits.
Destination mobile
- Domestic
- 9XXX XXX XXX
- Mobile / saved contact
- +91 9XXX XXX XXX
- From United Kingdom
- 00 91 9XXX XXX XXX
Destination landline
- Domestic
- 011 XXXXXXXX
- Mobile / saved contact
- +91 11 XXXXXXXX
- From United Kingdom
- 00 91 11 XXXXXXXX
Use +91 for a saved Indian contact. A UK line that requires an all-digit access string uses 00 91 and omits a domestic trunk 0 from an Indian fixed-line number.
Open full walkthroughHow to call United Kingdom from Australia
Origin access: 0011
- 1Start with country code +44 for United Kingdom.
- 2Remove the national prefix 0 before adding +44. The 0 is not part of the national significant number in international format.
- 3Use + on a mobile, or replace + with 0011 when the origin network requires digits.
Destination mobile
- Domestic
- 07700 900XXX
- Mobile / saved contact
- +44 7700 900XXX
- From Australia
- 0011 44 7700 900XXX
Destination landline
- Domestic
- 020 7946 XXXX
- Mobile / saved contact
- +44 20 7946 XXXX
- From Australia
- 0011 44 20 7946 XXXX
Use +44 for a saved UK contact. On an Australian service that requires digits, use 0011 44 and remove the UK domestic trunk 0.
Open full walkthroughHow to call United States from Japan
Origin access: 010; alternatives: 001, 0033, 0041, 0061
- 1Start with country code +1 for United States.
- 2There is no separate domestic trunk digit to remove. The digit 1 may be used before the ten-digit number for long-distance dialling, but it is also the shared country code in international notation.
- 3Use + on a mobile, or replace + with 010 when the origin network requires digits.
Destination mobile
- Domestic
- (202) 555-01XX
- Mobile / saved contact
- +1 202 555 01XX
- From Japan
- 010 1 202 555 01XX
Destination landline
- Domestic
- (212) 555-01XX
- Mobile / saved contact
- +1 212 555 01XX
- From Japan
- 010 1 212 555 01XX
Use +1 for a saved US contact. Japan commonly uses 010 for international access, while carrier-specific services can use another documented prefix before the +1 NANP destination.
Open full walkthroughHow to call Germany from United Kingdom
Origin access: 00
- 1Start with country code +49 for Germany.
- 2Remove the leading domestic 0 before adding +49.
- 3Use + on a mobile, or replace + with 00 when the origin network requires digits.
Destination mobile
- Domestic
- 015X XXXXXXXX
- Mobile / saved contact
- +49 15X XXXXXXXX
- From United Kingdom
- 00 49 15X XXXXXXXX
Destination landline
- Domestic
- 030 XXXXXXXX
- Mobile / saved contact
- +49 30 XXXXXXXX
- From United Kingdom
- 00 49 30 XXXXXXXX
Save +49 in contacts; use 00 only for all-digit UK access. Do not store 00 in the contact. It is the UK exit prefix.
Open full walkthroughHow to call Japan from United Kingdom
Origin access: 00
- 1Start with country code +81 for Japan.
- 2Remove the first domestic 0 before adding +81.
- 3Use + on a mobile, or replace + with 00 when the origin network requires digits.
Destination mobile
- Domestic
- 090 XXXX XXXX
- Mobile / saved contact
- +81 90 XXXX XXXX
- From United Kingdom
- 00 81 90 XXXX XXXX
Destination landline
- Domestic
- 03 XXXX XXXX
- Mobile / saved contact
- +81 3 XXXX XXXX
- From United Kingdom
- 00 81 3 XXXX XXXX
Save +81 in contacts; use 00 only for all-digit UK access. Do not store 00 in the contact. It is the UK exit prefix.
Open full walkthroughHow to call Italy from United Kingdom
Origin access: 00
- 1Start with country code +39 for Italy.
- 2Retain the leading 0 on geographic numbers after +39. It is part of the Italian national significant number, not a removable trunk prefix.
- 3Use + on a mobile, or replace + with 00 when the origin network requires digits.
Destination mobile
- Domestic
- 3XX XXX XXXX
- Mobile / saved contact
- +39 3XX XXX XXXX
- From United Kingdom
- 00 39 3XX XXX XXXX
Destination landline
- Domestic
- 06 XXXXXXXX
- Mobile / saved contact
- +39 06 XXXXXXXX
- From United Kingdom
- 00 39 06 XXXXXXXX
Save +39 in contacts; use 00 only for all-digit UK access. Do not store 00 in the contact. It is the UK exit prefix.
Open full walkthroughHow to call China from United Kingdom
Origin access: 00
- 1Start with country code +86 for China.
- 2Remove the domestic 0 from a fixed-line area code before adding +86. Mobile numbers do not use that fixed-line trunk 0.
- 3Use + on a mobile, or replace + with 00 when the origin network requires digits.
Destination mobile
- Domestic
- 1XX XXXX XXXX
- Mobile / saved contact
- +86 1XX XXXX XXXX
- From United Kingdom
- 00 86 1XX XXXX XXXX
Destination landline
- Domestic
- 010 XXXXXXXX
- Mobile / saved contact
- +86 10 XXXXXXXX
- From United Kingdom
- 00 86 10 XXXXXXXX
Save +86 in contacts; use 00 only for all-digit UK access. Do not store 00 in the contact. It is the UK exit prefix.
Open full walkthroughHow to call United Arab Emirates from United Kingdom
Origin access: 00
- 1Start with country code +971 for United Arab Emirates.
- 2Remove the leading domestic 0 before adding +971.
- 3Use + on a mobile, or replace + with 00 when the origin network requires digits.
Destination mobile
- Domestic
- 050 XXX XXXX
- Mobile / saved contact
- +971 50 XXX XXXX
- From United Kingdom
- 00 971 50 XXX XXXX
Destination landline
- Domestic
- 04 XXX XXXX
- Mobile / saved contact
- +971 4 XXX XXXX
- From United Kingdom
- 00 971 4 XXX XXXX
Save +971 in contacts; use 00 only for all-digit UK access. Do not store 00 in the contact. It is the UK exit prefix.
Open full walkthroughHow to call Ukraine from United States
Origin access: 011
- 1Start with country code +380 for Ukraine.
- 2Remove the leading domestic 0 before adding +380; keep the nine remaining digits.
- 3Use + on a mobile, or replace + with 011 when the origin network requires digits.
Destination mobile
- Domestic
- 067 XXX XX XX
- Mobile / saved contact
- +380 67 XXX XX XX
- From United States
- 011 380 67 XXX XX XX
Destination landline
- Domestic
- 044 XXX XX XX
- Mobile / saved contact
- +380 44 XXX XX XX
- From United States
- 011 380 44 XXX XX XX
Save +380 in contacts; use 011 only for all-digit US access. Do not store 011 in the contact. It is the US exit prefix.
Open full walkthroughCountry code, mobile and landline quick reference
Each row converts a domestic template into the reviewed international format. Area-code and service-prefix lengths can vary inside a country, so follow the linked country page instead of treating the visual spacing as a universal parser rule.
| Country / code | Mobile: domestic → international | Landline: domestic → international | Trunk-prefix rule |
|---|---|---|---|
| United States +1 | (202) 555-01XX → +1 202 555 01XX | (212) 555-01XX → +1 212 555 01XX | There is no separate domestic trunk digit to remove. The digit 1 may be used before the ten-digit number for long-distance dialling, but it is also the shared country code in international notation. |
| United Kingdom +44 | 07700 900XXX → +44 7700 900XXX | 020 7946 XXXX → +44 20 7946 XXXX | Remove the national prefix 0 before adding +44. The 0 is not part of the national significant number in international format. |
| Germany +49 | 015X XXXXXXXX → +49 15X XXXXXXXX | 030 XXXXXXXX → +49 30 XXXXXXXX | Remove the leading domestic 0 before adding +49. |
| France +33 | 06 XX XX XX XX → +33 6 XX XX XX XX | 01 XX XX XX XX → +33 1 XX XX XX XX | Remove the first 0 from the ten-digit domestic number before adding +33. |
| India +91 | 9XXX XXX XXX → +91 9XXX XXX XXX | 011 XXXXXXXX → +91 11 XXXXXXXX | Remove a domestic trunk 0 before a fixed-line area code. Do not add a 0 before a ten-digit mobile number in international format. |
| China +86 | 1XX XXXX XXXX → +86 1XX XXXX XXXX | 010 XXXXXXXX → +86 10 XXXXXXXX | Remove the domestic 0 from a fixed-line area code before adding +86. Mobile numbers do not use that fixed-line trunk 0. |
| Japan +81 | 090 XXXX XXXX → +81 90 XXXX XXXX | 03 XXXX XXXX → +81 3 XXXX XXXX | Remove the first domestic 0 before adding +81. |
| Australia +61 | 04XX XXX XXX → +61 4XX XXX XXX | 02 XXXX XXXX → +61 2 XXXX XXXX | Remove the leading domestic 0 before adding +61. |
| Brazil +55 | 0 XX 11 9XXXX XXXX → +55 11 9XXXX XXXX | 0 XX 11 XXXX XXXX → +55 11 XXXX XXXX | Remove the domestic 0 and any carrier-selection code before the two-digit area code when converting to +55 format. |
| South Africa +27 | 082 XXX XXXX → +27 82 XXX XXXX | 011 XXX XXXX → +27 11 XXX XXXX | Remove the leading domestic 0 before adding +27. |
| Singapore +65 | 8XXX XXXX → +65 8XXX XXXX | 6XXX XXXX → +65 6XXX XXXX | There is no domestic trunk prefix to remove from ordinary eight-digit numbers. |
| United Arab Emirates +971 | 050 XXX XXXX → +971 50 XXX XXXX | 04 XXX XXXX → +971 4 XXX XXXX | Remove the leading domestic 0 before adding +971. |
| Italy +39 | 3XX XXX XXXX → +39 3XX XXX XXXX | 06 XXXXXXXX → +39 06 XXXXXXXX | Retain the leading 0 on geographic numbers after +39. It is part of the Italian national significant number, not a removable trunk prefix. |
| Hong Kong +852 | 9XXX XXXX → +852 9XXX XXXX | 2XXX XXXX → +852 2XXX XXXX | There is no domestic trunk prefix; keep all eight digits after +852. |
| Spain +34 | 6XX XXX XXX → +34 6XX XXX XXX | 91X XXX XXX → +34 91X XXX XXX | There is no domestic trunk prefix. Keep all nine digits after +34; the leading 9 or 8 of a landline is part of the number. |
| Turkey +90 | 05XX XXX XX XX → +90 5XX XXX XX XX | 0212 XXX XX XX → +90 212 XXX XX XX | Remove the leading domestic 0 before adding +90; keep all ten remaining digits. |
| Mexico +52 | XX XXXX XXXX → +52 XX XXXX XXXX | XX XXXX XXXX → +52 XX XXXX XXXX | There is no domestic trunk prefix. Keep all ten digits after +52, and do not add 1, 01, 044 or 045. |
| Malaysia +60 | 01X XXX XXXX → +60 1X XXX XXXX | 03 XXXX XXXX → +60 3 XXXX XXXX | Remove the leading domestic 0 before adding +60. Keep the 1 at the start of a mobile prefix. |
| Indonesia +62 | No single mobile pattern | 021 XXXX XXXX → +62 21 XXXX XXXX | Remove the national prefix 0 in front of the area code or mobile network code, then add +62. |
| Ukraine +380 | 067 XXX XX XX → +380 67 XXX XX XX | 044 XXX XX XX → +380 44 XXX XX XX | Remove the leading domestic 0 before adding +380; keep the nine remaining digits. |
Plus sign, exit codes and carrier variations
Save the destination in + format because the plus sign adapts to the network where the call starts. If a phone or carrier requires digits, replace + with an access prefix from the origin country; never save that origin prefix as part of the destination number.
| Calling from | Common digits-only access | Practical variation |
|---|---|---|
| United States | 011 | Use + where supported; the digits-only prefix is an origin routing instruction. |
| United Kingdom | 00 | Use + where supported; the digits-only prefix is an origin routing instruction. |
| Germany | 00 | Use + where supported; the digits-only prefix is an origin routing instruction. |
| France | 00 | Use + where supported; the digits-only prefix is an origin routing instruction. |
| India | 00 | Use + where supported; the digits-only prefix is an origin routing instruction. |
| China | 00 | Use + where supported; the digits-only prefix is an origin routing instruction. |
| Japan | 010 | Other documented access services include 001, 0033, 0041, 0061. |
| Australia | 0011 | Use + where supported; the digits-only prefix is an origin routing instruction. |
| Brazil | 00 + carrier code | Domestic long-distance calls can be dialled as 0 + a two-digit carrier-selection code (CSP) + area code + number, and international calls as 00 + CSP + country code + number. Anatel’s numbering rules also allow both without the CSP. The carrier code is routing input for that call, not part of the destination E.164 number. |
| South Africa | 00 | Use + where supported; the digits-only prefix is an origin routing instruction. |
| Singapore | 001 | Use + where supported; the digits-only prefix is an origin routing instruction. |
| United Arab Emirates | 00 | Use + where supported; the digits-only prefix is an origin routing instruction. |
| Italy | 00 | Use + where supported; the digits-only prefix is an origin routing instruction. |
| Hong Kong | 001 | Use + where supported; the digits-only prefix is an origin routing instruction. |
| Spain | 00 + carrier code | Call-by-call carrier-selection codes begin 103, 104, 105 or 107 and are four to six digits long. They are dialled before the national number, or before 00 for an international call, and are not part of the destination number. |
| Turkey | 00 + carrier code | BTK assigns four-digit carrier-selection codes in the 10XY range. A code like this selects the carrier for one call and is not part of the destination number. |
| Mexico | 00 | Use + where supported; the digits-only prefix is an origin routing instruction. |
| Malaysia | 00 + carrier code | MCMC carrier-selection codes use the 18YXX format and are dialled before an area code or country code to choose a long-distance carrier for one call. They are not part of the destination number. |
| Indonesia | 00 + carrier code | Indonesian international prefixes take the form 00X, where the digit after 00 selects the international network operator; 001 is commonly used and is listed for Indonesia in the ITU list of dialling procedures. Domestic long-distance calls can use an 01X operator prefix in place of the plain 0. These prefixes route the call and are not part of the destination number. |
| Ukraine | 00 | Use + where supported; the digits-only prefix is an origin routing instruction. |
Which regional exceptions matter most?
Shared numbering plans
+1 covers the United States, Canada, and multiple Caribbean/Atlantic jurisdictions; the next digits resolve the destination.
Significant leading zero
Italian geographic numbers retain 0 after +39, unlike the removable trunk zero used by many countries.
Carrier-selection prefixes
Brazilian routing strings may contain a carrier code that must not be saved as part of the +55 destination number.
Overseas territories
A territory may share a parent code or use another code, so political association alone does not determine the dial string.
Handle the exceptions
Shared top-level codes, toll-free ranges and travel networks need more than a country-code substitution.
Numbering-plan sources
- ITU-T E.164: The international public telecommunication numbering planInternational Telecommunication Union. Verified 2026-07-19.
- ITU-T E.123: Notation for national and international telephone numbersInternational Telecommunication Union. Verified 2026-07-19.
- National numbering plan: United StatesInternational Telecommunication Union. Verified 2026-07-19.
- The National Telephone Numbering PlanOfcom. Verified 2026-07-19.
- National numbering plan: United KingdomInternational Telecommunication Union. Verified 2026-07-19.
- National numbering plan: GermanyInternational Telecommunication Union. Verified 2026-07-19.
- Décision n° 2025-2215 modifiant la décision établissant le plan national de numérotation et ses règles de gestion (Plan national de numérotation – version du 1er janvier 2026)Arcep. Verified 2026-09-27.
- La numérotationArcep. Verified 2026-09-27.
- National numbering plan: FranceInternational Telecommunication Union. Verified 2026-09-27.
- Annex to ITU Operational Bulletin No. 994: Dialling procedures (international prefix, national (trunk) prefix and national (significant) number)International Telecommunication Union. Verified 2026-09-27.
- National numbering plan: IndiaInternational Telecommunication Union. Verified 2026-07-19.
- National numbering plan: ChinaInternational Telecommunication Union. Verified 2026-07-19.
- National numbering plan: JapanInternational Telecommunication Union. Verified 2026-07-19.
- National numbering plan: AustraliaInternational Telecommunication Union. Verified 2026-07-19.
- Resolução Anatel nº 749, de 15 de março de 2022 (Regulamento Geral de Numeração)Anatel. Verified 2026-09-27.
- Código de Seleção de Prestadora (CSP)Anatel. Verified 2026-09-27.
- National numbering plan: BrazilInternational Telecommunication Union. Verified 2026-09-27.
- National numbering plan: South AfricaInternational Telecommunication Union. Verified 2026-07-19.
- National numbering plan: SingaporeInternational Telecommunication Union. Verified 2026-07-19.
- National numbering plan: United Arab EmiratesInternational Telecommunication Union. Verified 2026-07-19.
- Piano di numerazioneAGCOM. Verified 2026-07-19.
- National numbering plan: ItalyInternational Telecommunication Union. Verified 2026-07-19.
- The Numbering Plan for Telecommunications Services in Hong Kong (SAR), ChinaOffice of the Communications Authority (OFCA). Verified 2026-09-27.
- Code of Practice Relating to the Use of Numbers and Codes in the Hong Kong Numbering PlanCommunications Authority. Verified 2026-09-27.
- Descripción del Plan de Numeración TelefónicaMinisterio para la Transformación Digital y de la Función Pública. Verified 2026-09-27.
- Presentation of the E.164 national numbering plan: country code 34 – SpainMinisterio para la Transformación Digital y de la Función Pública. Verified 2026-09-27.
- National numbering plan: SpainInternational Telecommunication Union. Verified 2026-09-27.
- National numbering plan: TürkiyeInternational Telecommunication Union. Verified 2026-09-27.
- Ulusal Numaralandırma PlanıBilgi Teknolojileri ve İletişim Kurumu (BTK). Verified 2026-09-27.
- Taşıyıcı Seçim Kodu (10XY) registerBilgi Teknolojileri ve İletişim Kurumu (BTK). Verified 2026-09-27.
- National numbering plan: MexicoInternational Telecommunication Union. Verified 2026-09-27.
- A partir del 3 de agosto, México tendrá una nueva forma de marcación telefónica (Comunicado 34/2019)Instituto Federal de Telecomunicaciones (now Comisión Reguladora de Telecomunicaciones). Verified 2026-09-27.
- Plan Técnico Fundamental de Numeración (consolidated text, last amended DOF 3 December 2024)Instituto Federal de Telecomunicaciones (now Comisión Reguladora de Telecomunicaciones). Verified 2026-09-27.
- Numbering and Electronic Addressing PlanMalaysian Communications and Multimedia Commission (MCMC). Verified 2026-09-27.
- National numbering plan: MalaysiaInternational Telecommunication Union. Verified 2026-09-27.
- Peraturan Menteri Komunikasi dan Informatika Nomor 14 Tahun 2018 tentang Rencana Dasar Teknis (Fundamental Technical Plan) Telekomunikasi NasionalKementerian Komunikasi dan Digital (formerly Kominfo). Verified 2026-09-27.
- National numbering plan: UkraineInternational Telecommunication Union. Verified 2026-10-19.
- Order No. 1200 of 29.09.2008: Plan for transition to the advanced numbering system of the public telephone network of UkraineVerkhovna Rada of Ukraine (official legislation portal). Verified 2026-10-19.
See our editorial and sourcing methodology.