UK Mobile Guide

UK Mobile
Number Format

Confused by 07 numbers? Learn how to dial UK mobiles from abroad, identify networks, and avoid expensive premium numbers.

Calling UK MobileLine Active

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How to Dial UK Mobiles

The most common mistake is keeping the leading zero. Here is the correct format.

International Format

Domestic (Inside UK)

07700 900123

International (Outside UK)

+44 7700 900123

Drop the leading zero. Add +44.

Step 1: Exit Code

Dial your country's exit code (e.g., 011 for US, 00 for Europe) or just hold '0' to get the '+' sign on mobile.

Step 2: Country Code

Dial 44. This is the country code for the United Kingdom.

Step 3: Mobile Number

Dial the mobile number without the first '0'. UK mobile numbers are 10 digits long (excluding the 0).

Common Mobile Prefixes

While number portability means you can't be 100% sure of the network, these were the original allocations:

077

O2 / Vodafone

078

Vodafone / O2

079

EE (Orange/T-Mobile)

074

Three / MVNOs

075

Three / O2

073

EE / Three

The 070 Warning

Not all 07 numbers are mobiles. Numbers starting with 070 are "Personal Numbers". Scammers often use these because they look like mobiles but cost significantly more to call.

077, 078, 079...Real Mobile

070...Premium / Personal

Always check the second digit. If it is a 0 (e.g., 070), be careful.

Call UK Mobiles for Less

Avoid expensive carrier roaming rates. Use VoIP to call UK mobiles.

Country deep dive

Calling United Kingdom

Practical reference covering the destination country's dial code, time zone, mobile carriers, city area codes, business etiquette, and any regulatory rules that affect inbound calls. The information below is specific to this route — different country pairs surface different operational details.

Calling United Kingdom (+44)

United Kingdom sits in GMT (UTC+0) / BST (UTC+1, last Sunday of March to last Sunday of October).. The country dial code is +44 and the official language for business is English. Local business hours run roughly 9:00–17:30 typical. Pub-and-lunch culture clusters meetings 10:00–12:30 and 14:00–16:30..

Major cities & area codes

Edinburgh · 0131
Glasgow · 0141
Liverpool · 0151
Belfast · 028

Mobile carriers in United Kingdom

O2 (Virgin Media O2) · 07800-07899 ranges typical
Vodafone UK · 07700-07799 ranges typical
Three UK · 07800-07899 ranges typical

What to know when calling United Kingdom

•International calls to UK landlines should drop the leading 0 after +44; mobiles likewise (e.g. UK mobile 07700 900000 dials as +44 7700 900000).
•070 numbers look like UK mobiles but are 'personal numbers' that can cost the caller £0.50/minute or more — they're not real mobile lines.
•0800/0808 are freephone from UK landlines and (since 2015) from UK mobiles too. 03 numbers cost the same as 01/02 calls — used by NHS, banks, government.

Regulation & compliance (United Kingdom)

•Ofcom CLI Guidance requires presented caller ID to be a number the called party can call back; non-conforming traffic gets blocked or labelled.
•TPS (Telephone Preference Service) registration is enforced by ICO with fines up to £500k.

Calling United Kingdom from anywhere

StartACall routes calls to United Kingdom over Tier-1 carriers, supporting both landlines and mobile termination on every network listed above. Per-minute pricing is shown on the dialer once you sign up — no contract or subscription is required. From browser to +44 takes under five seconds on a stable connection.

Operational facts above are sourced from regulator publications and carrier disclosures; specific rates and routing are confirmed in the live dialer.

Nearby dialing codes

Other country and area codes

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