Who Called Me from 0300? UK non-geographic numbers
0300 is the UK Non-geographic (public sector) dialling code across 240 Ofcom-allocated number blocks. Look up who called from a 0300 number, identify the network operator, check against known scam patterns and report unwanted calls.
0300 is part of the UK non-geographic / corporate number range. Numbers here are not tied to a city; they're typically used by national businesses, public-sector helplines or VoIP services. Calls to 03 numbers are charged at the same rate as a standard UK landline call, including out of inclusive minutes packages.
You'll often see 03 numbers used by banks (e.g. Barclays' 0345 lines), public services (NHS 111, HMRC) and large UK SMEs that want a non-regional UK contact number without the higher cost of an 084x/087x line.
Ofcom-allocated blocks for 0300
These are the 240 currently-active number blocks Ofcom has allocated within the 0300 range, in order. Click any block to see the carrier, allocation date and recently-reported call patterns.
