FAQ: UK Phone Numbers | who-calls.me.uk

Understanding UK Phone Numbers

UK phone numbers follow specific patterns that can tell you a lot about who might be calling. Whether it's a mobile number, landline, business line, or international call, the number format provides valuable clues.

This guide answers common questions about UK phone numbers to help you better understand who's calling and identify potential scams before answering.

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UK Mobile Prefixes International Calls Number Spoofing TPS Service

UK Phone Number Formats

Type	Format	Example	Notes
UK Landline	01xxx / 02x	01632 960123	First part is geographic area code
UK Mobile	07xxx	07700 900123	Different ranges for different networks
UK Non-geographic	03xx	03069 990123	Cost same as landline, used by businesses
UK Freephone	0800 / 0808	0800 123 4567	Free to call from all phones
UK Premium Rate	09xx	0909 123 4567	Higher cost, often used for competitions
International	+[country code]	+1 555 123 4567	+ followed by country code (US is +1)

What do UK mobile prefixes mean?

UK mobile numbers always start with 07 followed by another digit that was originally assigned to specific network operators. While number portability means these associations are no longer fixed, they can still provide clues about the original provider.

Common UK Mobile Prefixes

074/075

Originally allocated to Vodafone

Examples: 07470 123456, 07555 123456

077/078

Originally allocated to BT Cellnet/O2

Examples: 07700 123456, 07890 123456

079

Originally allocated to Orange/EE

Examples: 07912 123456, 07989 123456

073

Originally allocated to EE/T-Mobile/Orange

Examples: 07305 123456, 07377 123456

Important Note About Number Portability

Since 1999, UK mobile customers have been able to keep their number when switching providers. This means the current network may not match what the prefix suggests. The prefix only indicates which network originally issued the number.

Special Mobile Number Ranges

070 numbers are not mobile numbers. They are "personal" numbers that can forward to other services and often have higher call costs.
076 numbers are typically used for pagers and some specialty services.
071, 072, and 073 ranges were introduced more recently as the original ranges became filled.

Spotting Suspicious Mobile Numbers:

Be wary of UK mobile numbers where:

All digits after '07' are the same (e.g., 07777 777777)
The number follows simple patterns (e.g., 07000 123456)
The number is from range 07000-07099 (rarely assigned to consumers)

How to tell if a call is from abroad?

International calls to UK phones are typically displayed with a country code prefix. However, scammers often use techniques to hide their true location. Here's how to identify international calls:

Standard International Format

Legitimate international calls usually appear on your phone as:

+[Country Code] [Number]

For example:

+1 555 123 4567 - United States or Canada
+33 1 23 45 67 89 - France
+49 123 4567890 - Germany
+91 98765 43210 - India

Common Signs of International Calls

The "+" Symbol

International calls typically display with a "+" symbol before the country code.

"International" Display

Some phones show "International" or the country name instead of the number.

Unusual Number Length

Numbers with more or fewer digits than standard UK number formats.

Unknown/No Caller ID

Many international scam calls appear as "Unknown" or "No Caller ID."

Warning: International Scam Tactics

Be especially wary of these common international scam patterns:

One-ring calls that hang up (trying to get you to call back premium international numbers)
Calls claiming to be from "Microsoft," "HMRC," or "Amazon" from foreign numbers
Calls with unusual background noise or call center sounds
Long delays before someone speaks after you answer

Popular International Scam Call Origins

These country codes are frequently associated with scam calls:

Country Code	Country	Common Scam Types
+1	USA/Canada	Tech support, IRS/tax scams
+44	UK (spoofed)	HMRC, banking scams
+234	Nigeria	Advance fee fraud, romance scams
+91	India	Tech support, refund scams
+63	Philippines	Romance scams, investment fraud

Safety Tips:

Don't answer calls from unknown international numbers
Never return missed calls to unfamiliar international numbers
Be suspicious of UK businesses supposedly calling from international numbers
Remember that government agencies like HMRC will never call from international numbers

Can scammers use local numbers?

Yes, scammers commonly use a technique called "caller ID spoofing" to make their calls appear to come from local UK numbers, even when they're actually calling from abroad. This deceptive practice makes it harder to identify and avoid scam calls.

What is Caller ID Spoofing?

Caller ID spoofing is the practice of deliberately falsifying the information transmitted to your caller ID display to disguise the true origin of the call. Scammers can make it appear as if they're calling from:

A local number with your area code
A trusted organization like your bank or HMRC
A legitimate business number
A number very similar to your own (known as "neighbor spoofing")
Government agencies or police departments

Common Number Spoofing Scams in the UK

Bank Fraud

Scammers spoof your bank's customer service number and claim to detect suspicious transactions.

HMRC Tax Refunds

Calls appearing to come from HMRC claiming you're due a tax refund or owe unpaid taxes.

Police/Action Fraud

Callers pretending to be police officers investigating fraud on your accounts.

Tech Support

Calls appearing to come from BT, Microsoft, or Apple claiming your computer has issues.

How to Spot Spoofed Numbers

Suspicious Timing

Calls from banks or government agencies outside normal business hours.

Urgency and Pressure

Callers creating urgency or threatening consequences if you don't act immediately.

Request for Details

Asking for personal information, passwords, or requesting money transfers.

Poor Call Quality

Background noise, delays, or poor connections despite appearing as a local number.

How to Protect Yourself from Number Spoofing:

Never trust the caller ID display as proof of who's calling
Don't answer unknown numbers - legitimate callers will leave a message
Hang up and call back using the official number from their website or your statement
Use call blocking apps that can help identify potential spoofed calls
Report suspicious calls to Action Fraud and your phone provider

What is TPS and does it work?

The Telephone Preference Service (TPS) is the UK's official opt-out register for unsolicited sales and marketing calls. While it's an important tool for reducing unwanted calls, it has limitations in today's complex telecommunications landscape.

How TPS Works

Registration

TPS registration is free and permanent. You can register your landline or mobile number through the official website at tpsonline.org.uk or by calling 0345 070 0707.

Legal Requirements

Once registered, organizations are legally required to stop calling you for marketing purposes within 28 days. This is enforced under the Privacy and Electronic Communications Regulations (PECR).

The TPS doesn't block calls directly - it's a register that legitimate companies must check against before making marketing calls. Companies that ignore the TPS registration can face fines of up to £500,000 from the Information Commissioner's Office (ICO).

When TPS Works Well

TPS is most effective against:

Legitimate UK-based marketing companies
Larger organizations with robust compliance processes
Companies concerned about regulatory fines and reputation
Organizations that purchase marketing data from reputable sources

Limitations of TPS

TPS Cannot Stop:

Overseas callers - Companies based outside the UK are not bound by TPS regulations
Fraudulent callers/scammers - Organizations deliberately breaking the law
Recorded/automated messages - These require specific consent regardless of TPS
Companies you have a relationship with - If you've given them permission
Market research calls - These are exempt from TPS restrictions

Is TPS Registration Worth It?

Yes, despite its limitations, TPS registration is generally worthwhile because:

It's completely free and only takes a few minutes
It does reduce unwanted calls from legitimate UK businesses
It strengthens your case if you need to make a complaint
It provides an additional layer of protection alongside other measures

Beyond TPS: Additional Protection

For comprehensive protection, combine TPS registration with these additional measures:

Call Blocking Technology

Use smartphones' built-in call blocking or landline call blockers like BT Call Protect or TalkTalk CallSafe.

Third-Party Apps

Apps like Truecaller, Hiya, or Should I Answer? can identify and block nuisance callers.

Report Unwanted Calls

Report persistent calls to the ICO, Action Fraud, and your telephone provider.

Privacy Audit

Regularly check where your number is visible online and restrict sharing your number.

How to Register with TPS

Online:

Visit www.tpsonline.org.uk
Click on "Register Now"
Enter your phone number and details
Complete verification process

By Phone:

Call 0345 070 0707
Have your phone number ready
Follow the voice prompts
Registration takes effect within 28 days

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FAQs About UK Phone Numbers