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Check who owns a UK phone number. Enter any number and see which operator it is registered to — instantly, free, and without creating an account.
Useful for verifying unknown callers, checking shared service lines, or identifying the business behind a number before you call back.
- Business and operator data only — no personal information
- Search by number or company name
- Covers 0800, 0808, 0845, 0870, and local 01/02 numbers
Whois number lookup
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What you get
A fast, free way to check any UK phone number — no registration, no cost.
Instant results
Enter a number and see the registered operator immediately. No account needed, no waiting — just type and search.
Privacy safe
We only show the registered operator and, where available, the business name. Personal data is never displayed. Fully compliant with UK privacy regulations.
All major number types
Works with freephone (0800, 0808), shared cost (0845, 0870), local geographical (01, 02), and mobile numbers.
How it works
Enter a UK phone number in the search bar above. We check it against the public number database maintained by the telecom regulator and UK telecom operators, and show you which operator the number is registered to — and, where the data is available, which business or organization uses it.
This is especially useful for shared service numbers like 0800 and 0808, where the operator name alone can tell you whether a number belongs to a bank, a government service, or a scam.
What you can find out
For most numbers, we show the telecom operator the number is assigned to. For freephone and shared cost numbers (0800, 0808, 0845, 0870), the registered business name is often visible as well — because these numbers are allocated directly to organizations rather than individuals.
For local geographical numbers (01 and 02), we show the operator and the area the number is registered in. For mobile numbers, we show the network operator.
What you cannot find out
We do not display personal data — names, addresses, or any information about individuals. If a number is used by a private person, only the network operator is shown. This is by design: UK privacy regulations prevent the public disclosure of personal subscriber data.
If a caller has withheld their number, there is no way to identify it through a lookup tool. The number is blocked at the network level and is not available to any public database.
Please do not phone us for more information about a number. The results shown on this page are all the information we have. We do not hold any additional data about number owners or subscribers, and our team cannot look up anything beyond what this tool already provides.
Checking numbers before you call back
Missed a call from an unfamiliar number? Before calling back, check it here. If the number belongs to a known business or government service, you can call back with confidence. If the operator is unfamiliar or the number does not appear in the database, it may be worth ignoring — especially if the caller left no voicemail.
This is particularly useful for avoiding callback scams, where a missed call from a premium rate number is designed to make you call back at a high per-minute charge.
Useful for businesses too
If you run a business, the lookup tool helps you verify numbers before adding them to your contacts or returning calls. It is also useful for checking competitor numbers, verifying supplier contact details, or confirming that a number ported to your account is correctly registered.
CallFactory customers can use this tool alongside our call insights to cross-reference incoming call data with operator information.
Whois number lookup FAQ
Common questions about the number lookup tool and what it can do.
Yes. Enter any business number and we show the registered operator. For freephone and shared cost numbers, the business name is often visible as well.
No. We only display the registered operator and, where available, the business or organization name. Personal subscriber data is never shown — this complies with UK privacy regulations.
No. A withheld number is blocked at the network level. No public lookup tool can identify it. If you are being harassed by withheld calls, contact your phone provider — they can block them for you.
The tool covers freephone (0800, 0808), shared cost (0845, 0870), local geographical (01, 02), and mobile numbers. For international numbers, contact our team.
The database is updated regularly using official sources including telecom regulator number allocation data and operator registrations.
We show the network operator (e.g. EE, Vodafone, Three, O2) but not the individual subscriber. Personal data for mobile numbers is protected by privacy legislation and is not publicly available.
Yes, completely free. No account, no login, no limits.
Yes. If you receive a missed call from an unfamiliar number, check it here before calling back. If the number belongs to a premium rate operator or does not appear in the database, it is safer to ignore it.
No. The results shown on this page are all the information we have. We do not hold any additional data about number owners or subscribers beyond what this tool displays. Our team cannot look up anything more than what you see here.
