How to Call the United Kingdom from the US [+ Area Codes]

To call the UK from the US, dial 011 + 44 + the local number (drop the leading 0). Whether you’re calling England, Scotland, Wales, or London specifically, the country code is always 44.

International phone calls can quickly get expensive, so it pays to get the sequence right on your first attempt. While online apps like WhatsApp, Skype, or Nextiva provide strong voice over IP choices over a data connection, physically dialing a traditional UK number from an American phone line requires a specific international sequence.

This guide outlines exactly how to dial the UK, separates city area codes from mobile network prefixes, and breaks down the current per-minute international costs you should expect.

How to Call the United Kingdom From the United States

Standard landline dialing format

Placing a call to a standard UK landline involves three key inputs:

• The US exit code (011): Signals your local US carrier that the call is routing outside of North America.
• The UK country code (44): Directs the call straight to the United Kingdom’s national telecom network.
• The local number (minus the leading zero): Domestic UK numbers always feature a leading 0 zero when dialed within the country (e.g., 01632 960345). When dialing internationally, you must drop this leading zero.

USA Country Code When Calling the UK

When coordinates are reversed, technical confusion arises regarding the USA country code.

• When you’re placing an outbound call from the United States to London or anywhere else in England, you don’t use the USA country code. You strictly use the US international exit code, 011.
• However, if your contacts inside the United Kingdom need to call your American phone line back, the USA country code is 1.

For a UK caller to reach you in America, their outbound sequence mirrors yours in reverse: they dial the UK international exit code (00), follow it with the USA country code (1), and then enter your standard 10-digit American phone number (e.g., 00 + 1 + Area Code + Local Number).

UK Area Codes by City (London, Manchester, Edinburgh, etc.)

Just like the North American Numbering Plan uses area codes, counties and cities across the UK feature distinct geographic area codes. The vast majority of standard UK phone numbers contain 11 total digits (including the domestic leading zero), while a handful of legacy regions utilize 10 digits.

When calling from the US, dial the exit code (011), the country code (44), and then enter the city area code directly followed by the local number. Remember to omit the leading zero of the area code. For example, London’s domestic area code is 020. When calling from the US, you dial 20 immediately after 44.

Dialing Mobile, Toll-Free, and Non-Geographic Numbers

Calling UK mobile phones from the US

The core structural sequence for calling a UK mobile phone mirrors the landline path, but with a different set of digits. Mobile phones in the UK don’t use geographic area codes. Instead, they use non-geographic routing prefixes tied to cellular networks (such as Vodafone, O2, or EE), typically starting with a 7 once the leading zero is dropped.

• International dialing sequence: 011 + 44 + 7700 900077
• Domestic mobile example: 07700 900077

Calling UK toll-free and non-geographic numbers from the US

Toll-free numbers within the UK natively utilize 0800 or 0808 prefixes.

Important cost warning: Calling a UK toll-free number from an American phone line is not free. Your US carrier will still apply standard international per-minute long-distance charges to route the call across the Atlantic trunk.

Other prefixes like 03xx or 08xx represent non-geographic commercial business lines, such as corporate call centers or premium utility lines, which carry variable underlying connection costs.

International non-geographic sequence: 011 + 44 + 3069990000

Timing Your Call: Time Zones and Crossover Anomalies

The entire United Kingdom operates within a single unified time zone across England, Scotland, Wales, and Northern Ireland. However, because the US and the UK transition to Daylight Saving Time on completely different dates, a brief crossover anomaly occurs twice a year.

Standard US time zone deviations from Greenwich Mean Time (GMT)

When the UK sits on standard time (late autumn to early spring), the baseline hour additions are highly consistent:

The daylight saving time crossover pitfall

In the UK, clocks spring forward one hour on the last Sunday in March to enter British Summer Time (BST) and fall back on the last Sunday in October.

In the US, clocks shift on the second Sunday in March and return to standard time on the first Sunday in November.

During these mismatched spring and autumn gaps, the normal time difference shrinks by exactly one hour. If you manage daily communication between the US and UK teams, use synchronization tools like World Time Buddy during crossover windows to prevent missing scheduled corporate meetings.

UK National Public Bank Holidays (2026 – 2027)

Except for organizations with dedicated, 24/7 automated support queues, most standard UK operations close or reduce their active business hours during national bank holidays. Ensure your call scheduling accounts for these upcoming closures:

Scotland observes an additional statutory holiday on January 2nd. They also celebrate St. Andrew’s Day on November 30th (or the following Monday if it falls on a weekend).

Northern Ireland observes the Battle of the Boyne (Orangemen’s Day) annually on July 12th (or the following Monday if it lands on a weekend).

How Much Does It Cost to Call the UK From the US?

International calling expenses vary based on your carrier platform and whether you are dialing a landline or a mobile network terminal.

The baseline rates outlined below represent standard international entries from Nextiva’s corporate rate index when placing calls over a secure, cloud-hosted business VoIP phone system:

☎️ More Info: Compare International Calling Rates from Nextiva ↗

How to Make Business Phone Calls to the UK Using Nextiva

To ensure total corporate account security and eliminate accidental fraud charges, international outbound dialing is deactivated by default across new Nextiva deployments. Authorized system administrators can enable international calls by connecting briefly with account support.

Once international trunks are provisioned, placing a high-definition voice call to London, Manchester, or anywhere else in the UK is a simple, plug-and-play process.

• Enter the exit path: Dial 011 on your Nextiva softphone application or IP desk hardware to point the voice channel outside the US grid.
• Input the country target: Dial 44 to lock onto the United Kingdom national routing path.
• Enter the city area code or mobile prefix: Provide the specific regional dial code, making sure to completely omit the leading domestic zero.
• Enter the phone number: Input the remaining digits of the phone identity cleanly without adding manual dashes, spaces, or plus signs.

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International Dialing FAQs