🇬🇧 United Kingdom (+44)

UK Phone Number Validator & Carrier Lookup

Validate UK mobile and landline numbers against Ofcom's numbering plan data and return the originally allocated network (EE, O2, Vodafone, Three, plus MVNOs) with line type. Static-dataset lookups: sub-20ms, fractions of a cent per call, and dramatically cheaper than live HLR.

Try it — UK numbers

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+44
Dial code
10
Digits after +44
4+
Networks & MVNOs
< 20ms
Lookup latency

Carrier lookup for UK mobile numbers

Veriphone validates UK numbers against Ofcom's national numbering plan and returns the originally allocated network and line type from static numbering-plan data. No live HLR query is performed — which is exactly why this costs fractions of a cent per call and returns in under 20 milliseconds, instead of the per-call pricing and round-trip latency that a live HLR service requires.

For every +44 number, the response includes validity, originally allocated carrier name, line type (mobile, fixed-line, or non-geographic), and E.164 formatting. Ofcom's porting rules generally keep numbers within their original line type (mobile↔mobile, landline↔landline), so line-type classification is durable for most UK numbers — but VoIP hosting and edge cases mean it's not universally guaranteed.

Caveat on portability. UK mobile portability has been standard since 2003. Veriphone returns the original allocated network — if a subscriber has ported (for example, from O2 to EE), the current operator will differ. If your workflow specifically depends on the live operator (real-time SMS routing, some fraud-scoring models), layer a live HLR service on top of Veriphone for the critical subset of numbers. For most validation, compliance, and list-cleaning use cases, original-allocation data is what you need.

UK phone number format

UK numbers are 10 digits long after the +44 country code. The domestic trunk prefix 0 is dropped in international format. UK mobile numbers always begin with 7 (domestic 07xxx xxxxxx), while geographic landlines use area codes like 20 for London or 161 for Manchester.

Mobile — E.164 format
+44 7911 123456
Domestic form: 07911 123456 — the leading 0 is dropped for international format.
Landline — E.164 format (London)
+44 20 7946 0958
Common area codes: 20 (London), 121 (Birmingham), 161 (Manchester), 131 (Edinburgh), 141 (Glasgow).

Major UK mobile networks

Four mobile network operators (MNOs) own the UK infrastructure, and dozens of MVNOs resell on top of them. Veriphone identifies the network the number was originally allocated to in Ofcom's numbering plan data — usually the host MNO for MVNO-issued numbers.

EE (BT Group)
Largest UK operator; merger of Orange and T-Mobile UK.
O2 (Virgin Media O2)
Hosts Giffgaff, Tesco Mobile, Sky Mobile as MVNOs.
Vodafone UK
Hosts VOXI, Asda Mobile, Lebara as MVNOs.
Three (H3G)
Hosts SMARTY, iD Mobile, Honest Mobile as MVNOs.

Note: in 2024, Vodafone UK and Three announced a merger that would create the largest UK operator. Veriphone's data updates automatically as consolidation completes.

Who uses Veriphone for UK numbers

  • Marketing teams cleaning contact lists before SMS campaigns — filters disconnected numbers to protect sender reputation and cut wasted spend on Ofcom-registered TPS numbers.
  • Fintech and challenger banks validating customer numbers during onboarding to catch VoIP or virtual numbers commonly used in UK fraud.
  • Deliveroo-style logistics platforms verifying courier and customer numbers are reachable before dispatch.
  • SaaS and e-commerce with UK customers replacing naive regex with full validation at signup, recovering lost conversions from genuine users who typo their number.

Questions about UK number validation

Does Veriphone resolve ported UK numbers to the current network?

No. Veriphone uses static numbering-plan data from Ofcom and returns the originally allocated operator. UK mobile porting has been standard since 2003, so for ported numbers the current network may differ. If you specifically need the live operator, layer a live HLR service on top of Veriphone — using Veriphone's static data for the bulk of validation and calling HLR only on the subset that requires it is typically 10–100× cheaper than running live HLR on every number.

Can it distinguish mobile from landline?

Yes. The response includes a line_type field: mobile, fixed_line, or non_geographic (e.g. 0800, 0845) based on Ofcom's original range allocation. Ofcom generally keeps ported numbers within their original line type, so this is reliable for most SMS-routing decisions — VoIP hosting on 07xxx ranges is an edge case worth noting.

What about MVNOs like Giffgaff or Tesco Mobile?

Veriphone returns the underlying MNO (the network operator the MVNO runs on). For most purposes — SMS routing, fraud scoring — the MNO is what you need. If you require MVNO-level data, contact us about enterprise options.

Is the service GDPR-compliant for UK data?

Yes. Veriphone is registered as a data processor, does not store phone numbers after validation, and complies with both UK-GDPR and EU-GDPR. See our GDPR page for details.

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