United Kingdom+44Tip: If the number starts with {prefix}, we'll remove it automatically for international dialing.
Check with your provider for international rates. Standard carrier charges may apply.
Dialing formula from United States to United Kingdom
To call United Kingdom from United States, dial: 011 + 44 + area code + local number
Example: 011 44 XX XXXX XXXX (where XX is the area code)
Current time and best calling window between United States and United Kingdom
Step-by-step calling United Kingdom from United States
- 1
Dial the United States Exit Code: 011
- 2
Enter the United Kingdom Country Code: +44
- 3
Input local United Kingdom area code and local number
- 4
Check the time zone and best time to call: UTC+0
The special relationship, one call at a time
Americans and Britons share more than a common language—they share family ties, business partnerships, and cultural exchanges that keep the phone lines busy. From Wall Street traders coordinating with the City of London to families split by the Atlantic, this corridor sees constant traffic. The relatively manageable 5-8 hour time difference makes real-time conversations possible, whether it's a morning call from New York catching London before dinner or a late afternoon chat that bridges the gap.
Everything you need to know about calling United Kingdom from United States
Connecting with friends, family, or business partners in United Kingdom from United States is straightforward when you understand the correct international dialing protocols. Whether you are calling a landline in London or a mobile phone in a remote province, this guide ensures your call connects on the first attempt.
The dialing sequence explained
To place your call, you must first signal to your local carrier that you are making an international call by dialing the Exit Code (IDD). For United States, this code is 011.
Once you have exited the local network, you must enter the Country Code (ISD) for United Kingdom, which is +44. This tells the global switching system to route your call specifically to United Kingdom's infrastructure.
Important rule on the trunk prefix
A common point of confusion is the 'Trunk Prefix'—usually a 0. In domestic calls within United Kingdom, this digit is used to signal a long-distance call. However, when calling internationally, this prefix must be omitted. If the local number you have is 012345678, you would only dial 12345678 after the country code.
Check the local time zone and scheduling considerations
Before you dial, consider the significant time difference. United Kingdom is currently 5 hours ahead of United States. While it might be mid-afternoon for you in New York City, it could be the middle of the night in London.
Our live tracker shows that it is currently 22:33 in United Kingdom. Based on standard business hours (09:00 to 17:00), we categorize this time as Night Hours. Calling during 'Social Hours' (07:00–09:00 or 17:00–21:00) is generally acceptable for personal calls, but we recommend avoiding 'Night Hours' (21:00–07:00) unless it is an emergency.
Cost-saving tips
International carrier rates can be high. For longer conversations, consider using data-based platforms or checking with your provider for international calling bundles specifically for the United States to United Kingdom corridor. Finally, save contacts in the '+' format to avoid manual dialing in the future.
