Technical and integrations

No, 0800 and 0900 are special UK national numbers that the international gateways do not route, which is why callers outside the UK hear a “number not in service” message when they try. Companies that need to be reachable from abroad pair the UK number with a local number in the destination country, which our international shop covers in over 70 markets.

Ofcom is the regulator that manages and supervises the national numbering plan, which means every CallFactory number is registered under your company name with Ofcom regardless of who delivers the service. The number stays your property, so you can port to another provider later without losing the brand recognition you built around it.