How much does it cost to call a 0333 number?

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

Is a call from a 0333 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 0333 number for my business?

Yes - 0333 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.

0333 Numbers – Cost, Who Uses Them & Range Holders

Prefix: 0333
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: 234
Range holders: 137

What are 0333 numbers?

Numbers starting 0333 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 0333, of which 234 are allocated to 137 providers.

Who uses 0333 numbers?

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

Who holds 0333 number ranges?

Range holder (allocated by Ofcom)	Number blocks	Example range
Gamma Telecom Holdings Limited	20	`0333 004 XXXX`
Colt Technology Services	16	`0333 070 XXXX`
GCI Network Solutions Limited	13	`0333 111 XXXX`
TalkTalk Communications Limited	9	`0333 001 XXXX`
Glide Student and Residential Limited	8	`0333 380 XXXX`
Windsor Telecom Limited	6	`0333 121 XXXX`
Vodafone Ltd (C&W)	5	`0333 009 XXXX`
Numbers Telecom Limited	4	`0333 402 XXXX`
BT	3	`0333 207 XXXX`
Barritel Limited	3	`0333 044 XXXX`
Magrathea Telecommunications Limited	3	`0333 042 XXXX`
Redcentric Solutions Limited	3	`0333 010 XXXX`

…and 125 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

0333 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 0333 caller ID is not proof you’re talking to a government body or bank.

Check a specific 0333 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 0303 0306 0330 0331 0343 0344 0345 0370 0371 0372

03 numbers guide › · All UK number ranges ›

0333 numbers – cost & who uses them