What is the USA country code?
Everything you need to dial a USA number correctly from a UK phone.
+1
The USA country code is +1. Dialling from the UK? Use 001 instead of the + — they do exactly the same thing.
How to dial a USA number from the UK
The US uses 10-digit numbers — a 3-digit area code plus a 7-digit local number. There is no leading zero to drop.
Example: New York: 001 212 + 7-digit number. Mobiles follow the same 10-digit format as landlines.
00 or +? Either works
Typing +1 (hold the 0 key on most phone keypads to get a +) is the international standard and works automatically wherever you're calling from. 001 is the UK's own way of dialling out internationally — both reach exactly the same number.
Looking for the cheapest way to call USA?
We compare WhatsApp, Rebtel and eSIM options honestly — not just the dialling code.
See calling options →Common questions
What is the USA country code?
The USA country code is +1. When dialling from a UK phone, replace the + with 001 instead.
Do I dial 00 or + to call USA from the UK?
Either works on most modern phones — typing "+" (hold 0 on most keypads) and the country code is the international standard and works automatically. The 00 prefix is the UK-specific way of dialling out internationally and does exactly the same thing.
Does this work for mobiles as well as landlines?
The US uses 10-digit numbers — a 3-digit area code plus a 7-digit local number. There is no leading zero to drop.
Is there a free way to call USA that doesn't need a dialling code at all?
Yes — WhatsApp, FaceTime and similar apps call over data instead of the phone network, so there's no country code to dial at all. They're free if the person you're calling also has internet, but aren't a substitute for reaching a landline or someone without a smartphone.
