How much does it cost to call a 0303 number?

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

Is a call from a 0303 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 0303 number for my business?

Yes - 0303 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.

0303 Numbers – Cost, Who Uses Them & Range Holders

Prefix: 0303
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: 1,000
Blocks in service: 62
Range holders: 28

What are 0303 numbers?

Numbers starting 0303 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 1,000 number blocks under 0303, of which 62 are allocated to 28 providers.

Who uses 0303 numbers?

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

Who holds 0303 number ranges?

Range holder (allocated by Ofcom)	Number blocks	Example range
BT	25	`0303 001 XXXX`
Colt Technology Services	5	`0303 080 XXXX`
Gamma Telecom Holdings Limited	4	`0303 003 XXXX`
GCI Network Solutions Limited	2	`0303 366 XXXX`
Telecoms World Direct Limited	2	`0303 222 XXXX`
Windsor Telecom Limited	2	`0303 303 XXXX`
Accounts Centre Limited	1	`0303 060 XXXX`
Atomstream Limited	1	`0303 141 XXXX`
Business Broadcast Communications Limited	1	`0303 232 XXXX`
CINOS LIMITED	1	`0303 070 XXXX`
Content Guru Limited	1	`0303 770 XXXX`
Digital Space Group Limited	1	`0303 030 XXXX`

…and 16 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

0303 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 0303 caller ID is not proof you’re talking to a government body or bank.

Check a specific 0303 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

0300 0306 0330 0331 0333 0343 0344 0345 0370 0371 0372

03 numbers guide › · All UK number ranges ›

0303 numbers – cost & who uses them