Range holder
British Telecommunications PLC
British Telecommunications PLC is listed by Ofcom as the originally-allocated communications provider for 9 UK number ranges. Numbers within these blocks may have since been ported to a different carrier — see the FAQ below.
About British Telecommunications PLC as an Ofcom Range Holder
A Range Holder is the UK communications provider that Ofcom originally allocated a block of numbers to under the National Telephone Numbering Plan. British Telecommunications PLC appears in Ofcom’s weekly Numbering Data feed against the 9 ranges listed below — meaning every UK number that falls inside one of those blocks was, at allocation time, handed to British Telecommunications PLC for use by their wholesale or retail customers.
Once a number is in service, the underlying customer can port it to a different provider while keeping the same digits. Ofcom does not publish a live current-carrier feed for the UK, so the Range Holder shown here is the best public signal for which provider operated a given block at allocation. If you are trying to identify the network on a specific British Telecommunications PLC-allocated number today, use the per-number lookup on the homepage — it combines this Range Holder data with a live AI internet check for the actual caller.
To learn how UK numbers are allocated, see How Ofcom allocates UK phone numbers. For the difference between an Ofcom-allocated Range Holder and the current carrier shown on caller ID, see Range Holder vs current provider.
Allocated ranges
| Prefix | Status |
|---|---|
| +44 121200 | Allocated |
| +44 131200 | Allocated |
| +44 161200 | Allocated |
| +44 203 | Allocated |
| +44 207946 | Allocated |
| +44 345 | Allocated |
| +44 800 | Allocated |
| +44 8001 | Allocated |
| +44 843 | Allocated |
Related lookups
Frequently asked questions
What does it mean that British Telecommunications PLC is the Range Holder?
A Range Holder is the communications provider Ofcom originally allocated a block of UK numbers to. British Telecommunications PLC therefore holds the registered allocation for the prefixes listed above. Once a number is in service, the customer can port it to another network — Ofcom does not publish current carrier data.
Does British Telecommunications PLC make calls to me?
Not necessarily. The Range Holder is the wholesale allocation; calls to or from these numbers can be made by retail customers (consumers and businesses) using the network. Use the per-number lookup to see if a specific call has any public reputation reports.