How to call the UK
From the US, dial 011, then the UK's country code 44, then the number without its leading 0. From a mobile, dial +44 and the number without the 0.
Calling the UK from the US- 011Exit code from the US or Canada
- 44The UK's country code
- 20Area code, London
- 7946 0123Local number
From a mobile: +44 20 7946 0123
Country code- +44
Dial from the US- 011 44 + number
Number length- 10 digits after the 0
Time zone- GMT, BST in summer (UTC+0/+1)
Paste a number, get the digits to dial
Copied a UK number from an email or a website? Paste it as it is. You'll get the exact digits to dial from where you are, whether it's a mobile or a landline, and where it rings.
Any format works: with or without the country code, spaces, dashes or brackets. It's read in your browser and never sent anywhere.
- From any mobile phone+44 20 7946 0123
- From a US or Canadian landline011 44 20 7946 0123
- From Europe and most other countries00 44 20 7946 0123
- From an Australian landline0011 44 20 7946 0123
- Inside the UK020 7946 0123
How to call the UK from the US, step by step
From the US, dial 011, then the UK's country code 44, then the number without its leading 0. From a mobile, dial +44 and the number without the 0.
01Dial 011
The exit code for calls leaving the US or Canada. On a mobile, press and hold 0 to type + instead, which works from any country.
02Dial 44
The UK's country code. Together with the exit code: 011 44 from a US landline, +44 from a mobile.
03Drop the leading 0
UK numbers are written with a 0 at the front (020 for London, 07 for mobiles). That 0 is only dialed inside the UK. From abroad, 020 becomes 20 and 07700 becomes 7700.
04Dial the rest of the number
Most UK numbers are 10 digits once the 0 is gone, like 20 7946 0123 for London or 7700 900123 for a mobile.
Dial formats for the UK, landline and mobile
The same two example numbers, written the way you dial them from each place. Swap in the number you need, or paste it into the formatter above.
Example numbers for illustration only.
Landline or mobile? How to tell in the UK
UK mobiles start with 07 (7 from abroad). Landlines start with 01 or 02, and the digits after tell you the town: 020 London, 0161 Manchester, 0121 Birmingham. Numbers starting with 03 are charged like landlines anywhere in the UK, and 0800 and 0808 are free to call from inside the UK only.
Main UK area codes
Best time to call a business in the UK
Lunch is short, usually around 12:30 pm to 1:30 pm, and most offices stay reachable. The UK is 5 hours ahead of New York and 8 ahead of Los Angeles for most of the year. Calling between 9 am and noon Eastern lands in the British afternoon.
Working days- Monday to Friday
- Typical office hours
- 9 am to 5:30 pm local time
- Time zone
- GMT, BST in summer (UTC+0/+1)
- From the US East Coast
- 9 am to noon ET
The time in the UK right now
Worked out from your own clock, daylight saving included.
- London, Manchester, Edinburgh --:--
How much does it cost to call the UK?
It depends on what you call from. A US mobile plan without an international add-on bills every minute abroad, often at a high rate. Calling apps are cheaper but show their own number. With Allo you call from the business number you already have, at a published per-minute rate, without buying a UK number.
Calling the UK with Allo- To landlines
- $0.20
- per minute
- To mobiles
- $0.02
- per minute
No UK number to buy and no prepaid credit. The call goes out from your Allo number, from the desktop or mobile app, and the rate is public before you dial.
Call the UK from your existing business number, no local number needed- Per-minute rates published for every destination, checked before you call
- From the Allo desktop and mobile apps, over Wi-Fi or data
- An AI summary and transcript after every call
- 7-day free trial
From a US Allo number. Averaged estimates published on rates.withallo.com, October 2026: the final rate can vary slightly with your number and the prefix dialed. Special and premium numbers are charged differently.
Can you call the UK for free?
WhatsApp is the default messaging app in the UK, and FaceTime Audio works between iPhones. It only works if the person you are calling has the same app and a data connection, and it cannot reach a landline, a switchboard or a business that only answers its phone line.
WhatsApp, FaceTime
Free over Wi-Fi or mobile data, as long as both people have the app installed and are online.
Not for landlines or businesses
An app call can't reach a landline, an office switchboard or anyone who isn't on the app. Most businesses still answer on their phone line.
A real call, at a fair rate
For everything else, call the number. With Allo, the UK landlines are from $0.20/min and mobiles from $0.02/min.
More calling guides
Calling the UK: your questions
The UK's country code is +44. From the US, dial 011 44 before the number. From a mobile anywhere, +44 does the same job.
From a US or Canadian landline, dial 011 (the exit code), 44 (the country code), then the number: 011 44 20 7946 0123. From most other countries, the exit code is 00 instead of 011.
Press and hold 0 to type +, then 44 and the number: +44 20 7946 0123. The + works from any country, so it's the safest way to save a UK number in your contacts.
UK mobiles start with 07 (7 from abroad). A landline written 020 7946 0123 at home is dialed 011 44 20 7946 0123 from the US, or +44 20 7946 0123 from a mobile.
A mobile written 07700 900123 is dialed 011 44 7700 900123 from a US landline, or +44 7700 900123 from a mobile. Paste any number into the formatter to see which kind it is.
Offices are typically open Monday to Friday, 9 am to 5:30 pm local time. Lunch is short, usually around 12:30 pm to 1:30 pm, and most offices stay reachable. The UK is 5 hours ahead of New York and 8 ahead of Los Angeles for most of the year. Calling between 9 am and noon Eastern lands in the British afternoon.
It depends on what you call from. A US carrier without an international add-on can charge a high per-minute rate. With Allo, calls to the UK landlines are from $0.20/min and mobiles from $0.02/min from a US business number, and every rate is published before you call.
Yes, with an app: WhatsApp is the default messaging app in the UK, and FaceTime Audio works between iPhones. It only works if the person you are calling has the same app and a data connection, and it cannot reach a landline, a switchboard or a business that only answers its phone line. To reach anyone else, place a regular call.
Often not. 0800 and 0808 numbers are free from inside the UK, but many are not reachable from abroad, or are charged at an international rate. Look for a regular 020, 01 or 03 number on the company's site instead.