0300 numbers UK — is 0300 free, who uses them?

0300 is the UK non-geographic number range reserved for public bodies and not-for-profit organisations — NHS trusts, local councils, government helplines, registered charities. Calls cost the same as a 01 or 02 landline call and are normally included in inclusive mobile minute bundles. If 0300 has called you, the prefix is a strong (but not infallible) signal you are speaking to a genuine UK public service.

#Is 0300 free to call?

Strictly, no — but effectively yes for most UK consumers in 2026. 0300 calls are charged at the same per-minute rate as a 01/02 landline call. On every major UK mobile network (EE, O2, Vodafone, Three, plus the MVNOs) 0300 is included in inclusive minute bundles. On a UK landline the per-minute rate is typically 5p out-of-bundle, or free on most bundled call plans.

#Who can have a 0300 number?

Unlike 0345 or 0333 (open to any UK business), 0300 has strict eligibility criteria set by Ofcom. To hold a 0300 number you must be one of the following:

• Public bodies — central government departments, executive agencies, NHS organisations, local authorities, devolved governments.
• Registered charities — registered with the Charity Commission for England and Wales, OSCR (Scotland), or CCNI (Northern Ireland).
• Not-for-profit organisations — community-interest companies (CICs), industrial and provident societies, registered social landlords.

This eligibility check is the reason 0300 reads as 'official' to UK consumers. It is significantly harder for a scam call-centre to obtain a genuine 0300 number than a 0345 or 0333 — though, as ever, the displayed CLI on an incoming call can be spoofed regardless.

#Common UK 0300 numbers

#Are 0300 calls included in my mobile bundle?

Yes — every major UK mobile network includes 0300 calls in inclusive minute bundles by default in 2026. The 03 family (0303, 0330, 0333, 0343, 0344, 0345, 0300) is treated the same as 01 / 02 landline calls for billing purposes. This is the rule that makes 0300 effectively free for almost all consumers.

#Who called me from a 0300 number?

1. 1

   Look it up here

   Paste the full 11-digit number into the lookup form at the top of the homepage. You will see the Range Holder (the wholesale provider that routes calls for the organisation) and a live AI internet check.

2. 2

   Search the brand name with the number

   Genuine 0300 numbers are usually published prominently on the organisation's own website. "0300 200 3310" hmrc should put the official HMRC contact page near the top of Google.

3. 3

   Cross-check against the NHS / gov.uk directory

   If the call claims to be NHS or HMRC, verify the number against nhs.uk or gov.uk directly — never the link in a text message you received.

#0300 vs 0303 vs 0330 vs 0345

All four are part of the 03 non-geographic UK-rate family and cost the same to call. The differences are in who is allowed to hold them:

#Bottom line

0300 is the public-body / not-for-profit prefix in the UK 03 family. Standard UK rate to call, included in mobile bundles, and only available to organisations that meet Ofcom's eligibility test. If a 0300 number has called you and you want to verify it, look it up on this site and cross-check against the organisation's own website before discussing anything sensitive.