United Kingdom Calling Code
United Kingdom of Great Britain and Northern Ireland
- Last reviewed
- Last reviewed:
- Reviewed by
- Reviewed by countrycalling.codes editorial team
Popular routes
Key Facts
- International Calling Code
- +44
- Country Name
- United Kingdom
- Official Name
- United Kingdom of Great Britain and Northern Ireland
- Capital City
- London
- Region
- Europe
- Subregion
- Northern Europe
- ISO 3166-1 Alpha-2
- GB
- ISO 3166-1 Alpha-3
- GBR
- Trunk Prefix
- 0
- International Exit Prefix
- 00
United Kingdom Calling Code FAQ
- What is the country calling code for the United Kingdom?
- +44. From abroad, dial your network’s exit code (or +), then 44, then the UK number with the leading 0 removed.
- Is it +44 or 44?
- Same code. +44 is the portable form for contacts and mobiles; 44 is what follows an origin exit prefix (for example 011 44… from the US). UK outbound exit is commonly 00 when digits are required instead of +.
- Do I drop the leading 0?
- Yes for UK numbers after +44. Domestic 020… → +44 20…; domestic 07… → +44 7…. Do not store +44 (0)… or +44 020….
- How do I dial a UK mobile from abroad?
- From 07700 900XXX, drop the first 0, then dial or save +44 7700 900XXX (or exit code + 44 7700 900XXX).
- Is +44 the same as GB? What about 070 numbers?
- +44 is the ITU calling code; GB / GBR are ISO country codes — not what you dial. Treat 070 personal numbers as their own range, not ordinary mobiles.
How to Dial United Kingdom
Saving the number in contacts
Start with +44, then use the reviewed national significant number. Remove the national prefix 0 before adding +44. The 0 is not part of the national significant number in international format.
Calling from abroad
On a mobile, use the + form. If a network requires digits instead, replace + with that origin network's international prefix. United Kingdom's own standard exit prefix for outbound calls is 00.
Trunk prefix 0 is dropped when dialing internationally.
Calling a United Kingdom mobile
Remove the first 0 from 07700, then add +44.
- Domestic display
- 07700 900XXX
- International display
- +44 7700 900XXX
- +44Country code: United Kingdom
- 7700Mobile range: Example mobile prefix without the trunk 0
- 900XXXSubscriber digits: Placeholder digits
Calling a United Kingdom landline
Remove the first 0 from 020, then add +44.
- Domestic display
- 020 7946 XXXX
- International display
- +44 20 7946 XXXX
- +44Country code: United Kingdom
- 20Area code: London code without the trunk 0
- 7946 XXXXSubscriber number: Placeholder digits
Exceptions and Routing Notes
Common United Kingdom Formatting Mistakes
- Keeping the domestic 0 and producing +44 020… instead of +44 20…
- Dialling 00 44 and also retaining the plus sign.
- Treating 070 personal numbers as ordinary mobile numbers.
Number Portability and Carrier Data
Mobile number portability means a prefix may not identify the current carrier. Treat carrier data as a timestamped lookup result, not a permanent property of the number.
Step-by-Step Calling Routes
These reviewed routes combine this country's numbering rules with the international-access rules used by the named origin.
Primary sources
- The National Telephone Numbering PlanOfcom. Verified 2026-07-19.
- National numbering plan: United KingdomInternational Telecommunication Union. Verified 2026-07-19.
- ITU-T E.164: The international public telecommunication numbering planInternational Telecommunication Union. Verified 2026-07-19.
See our editorial and sourcing methodology.
