0551 corporate & VoIP numbers
Ofcom’s numbering data lists 200 number ranges starting 0551, allocated to 4 providers. The largest holder is BT, with 5% of them. 055 numbers are used for corporate networks; 056 numbers are location-independent numbers often used by internet (VoIP) phone services.
Who were 0551 ranges given to?
Providers Ofcom allocated these number ranges to.
- Not allocated to a provider187 ranges
- BT10 ranges
- Pulsant (Scotland) Limited1 range
- 24 Seven Communications Limited1 range
- CFL Communications Ltd1 range
Range status
How Ofcom lists the ranges starting 0551.
Allocations by year
Explore by the next digit
Each block below starts 0551. Pick one to narrow it down.
What a 0551 number tells you
What it is
055 numbers are used for corporate networks; 056 numbers are location-independent numbers often used by internet (VoIP) phone services.
What it costs
Costs vary by provider – check your tariff.
Watch out for
Because they are not tied to a place, these numbers say little about where a caller really is.
0551 numbers: common questions
Who owns 0551 numbers?
Ofcom allocated the ranges starting 0551 to BT, Pulsant (Scotland) Limited, 24 Seven Communications Limited and others. Numbers can be moved between providers, so this shows who the range was originally given to – not who is using a particular number today.
How do I call a 0551 number from abroad?
Replace the leading 0 with +44. For example, a number starting 0551 becomes +44 551 followed by the rest of the number.
How much does it cost to call a 0551 number?
Costs vary by provider – check your tariff.
Is a call from a 0551 number a scam?
Because they are not tied to a place, these numbers say little about where a caller really is. Check the full number on Who’s Calling to see if it belongs to a verified business and what other people have reported.
Did a 0551 number call you?
Check the full number to see if it belongs to a verified UK business and what other people have reported.
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