UK’s Top Spam & Scam Numbers This Week

AI-verified from real consumer reports — updated every Wednesday.

Updated 21 May 2026

Rank	Number	Reported as	Type
#1	020 7946 0958	Naby Ltd Naby Ltd is a registered company located at 131 Finsbury Pavement, London, EC2A 1NT.	Verified
#2	08007613372	Sky Scam Users report receiving unsolicited calls from this number claiming to be from Sky, offering fake deals or attempting to gather personal information.	Scam
#3	07700 900 123	Investment Scam involving WhatsApp groups Users report receiving unsolicited messages or calls promoting fraudulent investment schemes via WhatsApp.	Scam
#4	08004970623	Domestic & General Users report calls from this number offering appliance insurance, with some expressing concerns about its legitimacy.	Telemarketing
#5	07364 165 789	Margaret Robinson Reported as a cost trap call from someone named Margaret Robinson.	Scam
#6	033 3344 3400	Utility Bill Scam Users report receiving harassing calls claiming to be from utility companies, often offering false services or demanding payment.	Scam
#7	011 3322 1050	Curve Credit Limited Curve Credit Limited is a financial services company based in London.	Verified
#8	07441 955 492	Investment Scam Caller Users report receiving unsolicited calls from this number, often involving fraudulent investment schemes.	Scam
#9	07394 513 075	Job Agency Scam Users report receiving unsolicited job offers via text or WhatsApp from this number.	Scam
#10	07441 933 356	Investment Scam Caller Users report this number is associated with investment scams involving WhatsApp groups.	Scam
#11	07379 885 796	Tax Scam Users report receiving scam calls from this number claiming to be from HMRC or other organizations.	Scam
#12	019 1380 0888	Neptune Property Developments Europe Limited Users report calls from this number as legitimate business communications.	Verified
#13	07922 331 048	Evri Text message claiming parcel was taken back.	Spam
#14	033 3092 9126	Freedom Logistics U.K. Limited Users report receiving calls from Freedom Logistics U.K. Limited, a legitimate business.	Verified

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Use this free UK phone number checker to validate any UK telephone number, see the correct formatting, identify the number type (01, 02, 03, 05, 07, 08, 09, 070 and 118), get call-cost guidance, detect the geographic area, and look up the original range holder using live Ofcom numbering data — refreshed weekly. It doubles as a UK phone number lookup, a UK telephone number validator and a UK reverse phone lookup — all in one place.

Whether you’re trying to figure out whose number is this, who called me from a UK number, or you need to validate a customer’s contact details for your CRM, this tool gives you everything Ofcom publishes — for free, with no signup. Use it as a quick UK phone number identifier when you need to identify a UK caller, run a free UK reverse phone lookup, or check if a number is genuine before you call back.

UK Telephone Number Types Explained

UK phone numbers are divided into number ranges, each with different pricing and purpose. Tap any card below for the key facts on each range.

“Who Called Me?” — using the checker for unknown UK numbers

If you’ve had a call from a UK number you don’t recognise — whether it’s a missed call from an unknown UK number, a withheld international caller, or a one-ring “wangiri” callback attempt — drop the digits into the checker above for an instant answer. A handful of prefixes drive most of the “who called me?” lookups we see every week:

• London overlays — who called me from 0203, who called me from 0204, who called me from 0207 and who called me from 0208 are all valid London (020) numbers from successive Ofcom overlay ranges.
• UK business non-geographic — who called me from 0330 and who called me from 0333 are usually UK businesses on a non-geographic plan, charged at standard 01/02 rate.
• Paid-service ranges — calls from 0843, 0844 and 0871 carry a service charge to the caller; always check the number before you call back.

If you’re stuck on a “what UK number called me?” question for a missed call you can’t place — or you just want a free way to identify a UK caller before you ring back — the lookup tells you in seconds.

The most useful information our checker gives you is:

Is this number a scam? UK spam call check, in three quick steps

Roughly a third of unwanted calls in the UK are spoofed — meaning the displayed Caller ID isn’t the real originator. Our tool effectively works as a free UK spam call check and a spoofed UK number check: if the digits you’ve been called from don’t match a real Ofcom-allocated block, that’s an instant red flag. To work out whether a UK number is a scam:

• Run the lookup above. A “not allocated” or “invalid” result almost always means the number was spoofed — a hallmark of fraud.
• Check the number type. Personal-numbering 070, premium-rate 09 and unfamiliar 084/087 ranges are common in callback scams. Treat unsolicited calls from these as untrusted by default.
• Cross-check the range holder. If the displayed company doesn’t match the Ofcom range holder we show, the call is probably impersonating a brand.

To block UK spam calls, add the number to your handset’s blocklist (iOS: Recents → ⓘ → Block this Caller; Android: Recents → long-press → Block) and consider registering with the Telephone Preference Service. To report a UK spam number or run a formal UK nuisance call check, forward suspect texts to 7726 (free, works on all UK networks) and report nuisance call patterns to the ICO. There is no single official “UK scam phone number list” — fraudsters cycle through spoofed numbers in minutes — so a live Ofcom-data lookup like this one is the only reliable per-number test.

Got a text instead of a call? Check who texted you

The checker works for text messages exactly as it does for calls. If you’ve received an SMS from a UK number you don’t recognise — a delivery alert, a “your account has been locked” warning, or just an unexplained message — type the number into the checker above to see the number type, the Ofcom range holder, the risk level, and whether other people have reported texts from it.

Three rules keep you safe with texts from unknown numbers:

• Never tap a link in an unexpected text — banks, HMRC, Royal Mail and delivery firms will never ask you to “verify” details via a text link. If in doubt, go to the organisation’s website or app directly.
• Check our guides:how to spot and report scam texts and what to do about texts from unknown numbers.
• Forward suspicious texts to 7726 — it’s free on every UK network (it spells “SPAM” on a keypad) and reports the sender straight to your mobile provider.
• Look the number up before replying — replying (even “STOP”) to a scam text confirms your number is live. Check it here first; if it’s been reported for smishing, just delete and block.

Had a text from a short 5-digit number (like 60011 or 86444)? Those are SMS short codes used by banks, networks and delivery firms — they can’t be called back and aren’t covered by the standard checker. Look the code up in our UK SMS short-code directory to see who uses it and whether replies cost anything.

UK Phone Number Formats — get it right every time

Whether you’re entering numbers into a CRM, configuring a VoIP system, or sending an SMS via an API, the format matters. Use the tool above as a quick UK phone number format checker to validate any UK mobile number, check if a UK number is valid before you save it to a contact, or convert a number to the UK phone number E164 format required by most VoIP and SMS providers. It also works as an international phone number checker for UK numbers — paste a +44 number from outside the UK and you’ll see all four standard representations:

Mobile numbers follow the same rules: a UK mobile dialled internationally is +44 7XXX XXX XXX — drop the leading 0.

UK Area Codes — most-searched lookups

Not sure where a UK landline call originated? The checker decodes every 01 and 02 number using Ofcom’s geographic area-code data. Here are the most-asked-about UK area codes by city:

Ofcom periodically opens new “overlay” codes (like additional ranges in 0203 for London) as the original blocks fill up. The checker uses the latest allocation file, so even brand-new ranges are recognised within a week.

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Deep-dive guides for every UK number range

Used the checker and want the full story behind a specific UK area code or number type? Each of the 21 guides below covers the Ofcom allocation history, who uses the range, what calls cost, common scam patterns and (where relevant) how to get one for your own business.

Guides by UK area code

020

London 020 area code

Overlay ranges (0203, 0207, 0208, 0204), allocation history, and what 020 numbers cost.

Read the full guide0121

Birmingham 0121 area code

Range allocation, who calls from 0121, and how to get a Birmingham landline.

Read the full guide0161

Manchester 0161 area code

Range holders, scam-call patterns, and Manchester business landlines.

Read the full guide0151

Liverpool / Merseyside 0151 area code

Liverpool 0151 ranges, providers, and how to spot a fake 0151 number.

Read the full guide0131

Edinburgh 0131 area code

Edinburgh landline ranges, allocation history, and call costs.

Read the full guide0141

Glasgow 0141 area code

Glasgow 0141 number blocks, providers, and reverse-lookup tips.

Read the full guide0113

Leeds 0113 area code

Leeds landline allocation, range holders, and how to verify a 0113 caller.

Read the full guide0114

Sheffield 0114 area code

Sheffield landline ranges, providers, and 0114 call costs.

Read the full guide0115

Nottingham 0115 area code

Nottingham 0115 number blocks, history, and reverse-lookup guidance.

Read the full guide0116

Leicester 0116 area code

Leicester 0116 ranges, providers, and how to spot a spoofed Leicester number.

Read the full guide0117

Bristol 0117 area code

Bristol landline ranges, allocation history, and 0117 call costs.

Read the full guide0118

Reading & Berkshire 0118 area code

Reading and Berkshire landline ranges, providers, and call costs.

Read the full guide0191

Newcastle / Tyneside 0191 area code

0191 covers Newcastle, Sunderland and Durham — full range allocation guide.

Read the full guide01224

Aberdeen 01224 area code

Aberdeen landline ranges, providers, and 01224 reverse-lookup tips.

Read the full guide01273

Brighton & Hove 01273 area code

Brighton and Hove landline ranges, allocation history, and call costs.

Read the full guide

Guides by UK number type

03 numbers

UK 03 numbers — complete guide

Cost, rules and use cases for 0300, 0330, 0333, 0345 and 0370 — full Ofcom 03-range overview.

Read the full guide0300

UK 0300 numbers (NHS, gov, charities)

Who can have a 0300 number, what they cost to call, and why they're not free from a mobile.

Read the full guide0333

UK 0333 numbers — what they cost

Who uses 0333 numbers, what they cost to call, and how they differ from 0330 / 0345 / 0370.

Read the full guide0345

UK 0345 numbers — local-rate business

How 0345 differs from 0345-equivalent ranges, who uses them, and what they cost.

Read the full guide0800 / 0808

UK 0800 freephone numbers

When 0800 / 0808 are free (since July 2015), how to get one for your business, and rules around routing.

Read the full guide0845

UK 0845 numbers — costs & rules

0845 service-charge rules, why they're mostly being retired, and what 0345 replacement options look like.

Read the full guide

How Our Checker Works (and why it’s better than the free alternatives)

Most “free phone number lookup” tools online are either lead-generation forms in disguise, populated with low-quality scraped data, or limited to US numbers. Ours is different — it’s a true telephone number checker UK users can rely on, doubles as a free UK phone number provider lookup when you need to look up a UK phone provider or work out what network is this UK number, and acts as the closest free public equivalent of an Ofcom range holder lookup when you want to know who owns a UK phone number block:

Need this as an API? UK phone number validation for developers

Our UK phone number checker is free to use as a web tool — but if you’re building software that needs to validate UK telephone numbers programmatically, classify them by type (mobile, geographic, premium, freephone), look up the Ofcom range holder behind a number, or estimate the per-minute call cost from mobile or landline, the same data is available as a commercial REST API.

What the UK phone number lookup API returns

• Validation & format — checks the number is a real UK allocation, returns it in national format (020 7946 0958) and E.164 (+442079460958).
• Number type — mobile, geographic landline (01/02), non-geographic (03), freephone (0800/0808), premium-rate (09), personal numbering (070), corporate (0500), pager (076), VOIP, etc.
• Ofcom range holder — the licensed operator who owns the number block (e.g. EE, BT, O2, Sky, Vodafone, Three, Gamma, TalkTalk Business, Virgin Media O2, plus 200+ smaller licensed range holders).
• Geographic area — for 01/02 numbers, the dialling code area (e.g. 0207 → Inner London, 0161 → Manchester).
• Call-cost guidance — typical per-minute cost from mobile vs landline, including any service charge / access charge breakdown for 084/087/09 numbers.
• Risk flag — heuristic indicator for high-risk numbers (premium-rate ranges, allocations historically associated with scam call patterns reported to Ofcom).

Common use-cases for a UK phone number validation API

• CRM & lead form validation — reject obviously invalid numbers at form submit, normalise the format on the way into your CRM, validate UK mobile numbers programmatically as customers type, and tag mobile vs landline for routing. Several customers use the API for one-off UK number cleansing for CRM migrations — running a CSV of contacts through the batch endpoint to dedupe, normalise to E.164 and drop dead numbers before importing into HubSpot, Salesforce or Dynamics.
• Call-cost calculators & billing systems — VOIP and PBX vendors who need to surface the indicative cost of an outbound destination before a call connects.
• Fraud / KYC enrichment — flag numbers in high-risk ranges, identify VOIP / freephone numbers used as account-recovery shortcuts.
• Number-portability checks — pair the range-holder lookup with an HLR query to determine the live network a mobile number is currently on (versus the original range holder).
• Compliance & FCA-regulated firms — maintain an audit trail of every customer-supplied number, validation status and classification.
• Form / signup defence — combine the validator with a regex pre-filter (the API is much more accurate than a UK telephone number regex on its own, but a regex makes a sensible first-pass on the client) to bounce obvious junk before it hits your backend.

How it works under the hood

The same engine that powers this page parses against the official Ofcom National Telephone Numbering Plan, refreshed regularly so range allocations stay current as Ofcom assigns and reassigns blocks. It’s UK-specific (no general international library) which means we get the edge cases right — corporate ranges, the rebanded 03 series, Channel Islands & Isle of Man allocations, and the 084/087/09 access-charge / service-charge split that confuses most international validators.

Pricing & access

The browser-based version on this page is free for personal and casual use with rate limits to keep it fair. Commercial API access is volume-priced and includes a higher rate limit, SLA-backed uptime, batch endpoints (CSV upload), and direct support from a UK-based engineer. Most customers move from the free tool to the API once they hit a few hundred lookups a day or need it embedded in a product they ship.

Talk to us about commercial UK phone number validation API access — typical onboarding takes 1 working day. Contact our team → or call 0333 015 2615.

Use the UK phone number checker as an app on your phone

This page is built as an installable web app (PWA) so you can use it as a free UK phone number checker app straight from your home screen — no App Store, no signup, no permissions to wade through. Hit “Add to Home Screen” in iOS Safari, or “Install app” from the address-bar menu in Android Chrome, and the checker becomes a one-tap icon you can use offline for cached lookups. It’s the simplest phone validator app for UK numbers we know of, and unlike most “free UK number checker app” listings on the stores, there’s no ad-supported wrapper around it — just the same Ofcom-backed lookup you get on the web.

Need a UK Business Phone Number?

If you’re a UK business that needs new phone numbers — a memorable 0330 / 0333 non-geographic, a free-to-callers 0800, a local 0207 / 0161 / 0121 area code for credibility — Connection Technologies’ Hypercloud Hosted VoIP platform can have you live with new DDIs (direct dial-in numbers), call routing, an IVR menu, voicemail-to-email and softphone apps for your team in days, not weeks.

Quick Answers