Normalize formats
Convert 07xxx local input to +44 7xxx E.164 before the check, especially when the list mixes UK and international records.
UK Carrier Lookup
Look up the current carrier, line type, and network context behind any +44 number (one at a time or across a whole CSV) before SMS routing, CRM enrichment, or compliance screening.
Built for business list cleaning, enrichment, routing, and review workflows. Use it with owned, consented, or otherwise lawful datasets.
UK number context
What a UK carrier lookup returns
Ofcom allocates UK number ranges, and the prefix still tells you the service type a number was issued as. A UK carrier lookup turns that prefix-level guess into a current record: the network or brand the number sits on today, the line type (mobile, landline, VoIP), and the normalized +44 E.164 format.
The two fields answer different questions. The carrier field matters for SMS routing and delivery. The line-type field matters for consent decisions, because UK marketing rules treat live calls and texts to subscribers differently depending on the service and how the number is used.
Read carrier and line type
Carrier drives routing; line type drives consent screening. Each answers a different question about the same number.
Export clean rows
Send mobile, landline, VoIP, and invalid records to separate files for routing, enrichment, or removal.
UK number ranges, decoded
The UK numbering plan is more informative at prefix level than the North American one, but it still has traps that catch list owners every week. The range tells you what the number was issued as, not necessarily how it is used today.
| Range | Issued as | What to watch for |
|---|---|---|
| 01 / 02 | Geographic landline | Fixed-line service tied to an area; common for residences and offices. |
| 03 | UK-wide non-geographic | Charged like 01/02; popular with organisations that want one national number. |
| 07 | Mobile | Consumer mobiles; the range most consent-sensitive marketing touches. |
| 070 | Personal numbering | Not mobiles. Often misread as mobiles because the prefix looks similar — flag these for review instead of blasting them. |
| 0800 / 0808 | Freephone | Free to call from UK landlines and mobiles; usually business-side numbers. |
| 09 | Premium rate | Screen these out of marketing lists entirely unless premium is the business model. |
The big four networks and porting churn
Four mobile networks operate the UK's radio infrastructure: EE (part of BT), O2 (merged with Virgin Media), Vodafone, and Three. A familiar crowd of MVNO brands rides on top (giffgaff on O2, VOXI on Vodafone, Tesco Mobile on O2), so the carrier field can name either the network or the brand, and both answers route the same way.
Since text-to-switch launched in July 2019, moving between networks takes a PAC code and hours rather than days. Churn is constant, which is why the prefix no longer predicts today's network and why the number portability guide matters for anyone holding UK lists long-term. Where the number sits today is a lookup question, not a prefix question.
PECR, TPS, and the line-type field
UK electronic marketing runs under PECR, and the two do-not-call registers (TPS for consumers, CTPS for corporates) are the first screen for live marketing calls. Line type sharpens that screen: numbers that read as mobile usually need explicit consent for marketing texts, while corporate landline segments belong in a CTPS check before any live call work.
The 070 trap is worth repeating: personal numbering looks like mobile at a glance, behaves differently in cost and consent terms, and reliably survives naive prefix filters. If your workflow screens UK lists for outbound marketing, the compliance scrubbing guide shows where the line-type check fits, and the SMS routing guide covers the deliverability side.
FAQ
UK Carrier Lookup FAQ
What do UK number prefixes tell you?
Ofcom ranges indicate service type: 01/02 geographic landline, 03 UK-wide non-geographic, 07 mobile, 0800/0808 freephone, 09 premium rate. The range shows what the number was issued as, not which network it sits on today.
Is a 070 number a mobile number?
No. 070 is personal numbering, a different service with different costs and rules. It is commonly misread as mobile because the prefix looks similar, so treat it as a review flag rather than a mobile segment.
Which network does a +44 7xxx number belong to?
There is no way to tell from the prefix. Since text-to-switch launched in 2019, porting between EE, O2, Vodafone, and Three takes hours, so today's network is a lookup question, not a prefix question.
How does a UK carrier lookup help with marketing compliance?
Line type sharpens PECR and TPS/CTPS screening: mobile segments usually need explicit consent for marketing texts, and corporate landline segments belong in a CTPS check before live call work.
Can ZelNum process UK carrier lookups in bulk?
Yes. Upload a CSV or TXT, normalize the phone format, and export per-row carrier, line type, and country fields for routing, enrichment, or cleanup.
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