How much does it cost to call a 0300 number?

Same as 01/02 calls; included in inclusive minutes. Ofcom rules guarantee this.

Is a call from a 0300 number a scam?

It can be. Caller IDs can be spoofed and scammers favour official-looking prefixes, so treat unexpected calls with caution: never share personal, banking or one-time-code details, and verify the organisation on a number you find independently.

Can I get a 0300 number for my business?

Yes - 0300 numbers can be set up on a hosted phone system and pointed at any line or device. Use The Geeks can provision one (or port an existing number) as part of a hosted telephony setup.

0300 Numbers – Cost, Who Uses Them & Range Holders

Prefix: 0300
Number type: UK-wide non-geographic
Cost to call: Same as 01/02 calls; included in inclusive minutes
Geographic: No – UK-wide
Ofcom blocks in range: 1,009
Blocks in service: 240
Range holders: 88

What are 0300 numbers?

Numbers starting 0300 are UK uk-wide non-geographic numbers in Ofcom’s 03 numbers range. They are not tied to any town or city. Ofcom currently lists 1,009 number blocks under 0300, of which 240 are allocated to 88 providers.

Who uses 0300 numbers?

Public bodies, charities and national businesses that want one number for the whole UK without tying it to a town.

Who holds 0300 number ranges?

Range holder (allocated by Ofcom)	Number blocks	Example range
Gamma Telecom Holdings Limited	52	`0300 006 XXXX`
BT	27	`0300 013 XXXX`
Lumen Technologies UK Limited	21	`0300 060 XXXX`
Colt Technology Services	15	`0300 025 XXXX`
TalkTalk Communications Limited	12	`0300 004 XXXX`
Vodafone Ltd (C&W)	10	`0300 010 XXXX`
Virgin Media Limited	7	`0300 029 XXXX`
GCI Network Solutions Limited	6	`0300 122 XXXX`
CINOS LIMITED	5	`0300 424 XXXX`
Windsor Telecom Limited	4	`0300 012 XXXX`
Six Degrees Technology Group Limited	2	`0300 045 XXXX`
Syntec Limited	2	`0300 482 XXXX`

…and 76 more providers hold smaller allocations in this range.

Ofcom’s data shows the provider each number range was originally allocated to — not who holds an individual number today. Numbers are frequently moved (ported) between providers, and no public database reveals the person or business behind a specific number, so treat any service that claims to with suspicion.

Scam & cost warnings

0300 numbers are low-risk for callers because Ofcom caps their cost at the 01/02 rate — but scammers still use and spoof them precisely because they look official. An 0300 caller ID is not proof you’re talking to a government body or bank.

Check a specific 0300 number

Paste the full number into the checker above to see its range holder and allocation status from this week’s Ofcom data — free, no sign-up.

Run mobiles for a business? See our business mobile network comparison or get a quote.

Related 03 prefixes

0303 0306 0330 0331 0333 0343 0344 0345 0370 0371 0372

03 numbers guide › · All UK number ranges ›

0300 numbers – cost & who uses them