05604 corporate & VoIP numbers
Ofcom’s numbering data lists 100 number ranges starting 05604, allocated to 3 providers. The largest holder is Magrathea Telecommunications Limited, with 2% of them. 055 numbers are used for corporate networks; 056 numbers are location-independent numbers often used by internet (VoIP) phone services.
Who were 05604 ranges given to?
Providers Ofcom allocated these number ranges to.
- Not allocated to a provider96 ranges
- Magrathea Telecommunications Limited2 ranges
- Kalnet4U Ltd1 range
- Inet Telecoms Ltd (Voipfone)1 range
Range status
How Ofcom lists the ranges starting 05604.
Allocations by year
Explore by the next digit
Each block below starts 05604. Pick one to narrow it down.
What a 05604 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.
05604 numbers: common questions
Who owns 05604 numbers?
Ofcom allocated the ranges starting 05604 to Magrathea Telecommunications Limited, Kalnet4U Ltd, Inet Telecoms Ltd (Voipfone). 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 05604 number from abroad?
Replace the leading 0 with +44. For example, a number starting 05604 becomes +44 5604 followed by the rest of the number.
How much does it cost to call a 05604 number?
Costs vary by provider – check your tariff.
Is a call from a 05604 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 05604 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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