01433 Area Code
The dialling code for Hathersage: what 01433 numbers are, who holds them, and what to do about a call you don't recognise.
What Is the 01433 Area Code?
Hathersage landline number. 01433 is the dialling code for Hathersage. Numbers starting 01433 are landline numbers for that area. Internet phone services can use them too, so a caller is not necessarily in Hathersage.
Who was the range allocated to?
Ofcom has allocated 01433 numbers to 78 providers. The largest holders are BT, Vodafone Ltd (C&W) and Digital Space Group Limited.
Numbers can be moved (ported) between networks, so the network a caller uses today may not be the one Ofcom allocated the block to. The allocation does not identify the person or business using a number.
Had a call from a 01433 number you don't recognise?
We can't tell you who called: an area code only shows the type of number and the provider Ofcom allocated the range to.
- Don't call back in a hurry, even if a message says it's urgent. Never give bank details or security codes on a call you didn't expect.
- Block the number from your phone's recent calls list.
- Forward scam texts free to 7726. Report unwanted marketing calls to the ICO, and see Ofcom's advice on scam calls.
- Register your number with the Telephone Preference Service to opt out of sales calls.
About the 01433 Range
| Number type | Hathersage landline number |
|---|---|
| Area | Hathersage |
| Number format | 01433 XXXXXX |
| Allocated by Ofcom | 38% of the range, to 78 providers |
| First allocation on record | 15 July 1994 |
| Most recent allocation | 29 June 2026 |
Largest holders of 01433 numbers
| Provider (as allocated by Ofcom) | Share of range | First allocated |
|---|---|---|
| BT | 4% | 15 July 1994 |
| Vodafone Ltd (C&W) | 2% | 2 September 2013 |
| Digital Space Group Limited | 1% | 30 November 2007 |
| GCI Network Solutions Limited | 1% | 20 December 2023 |
| Simwood eSMS Limited | 1% | 14 February 2012 |
| (Aq) Limited | 1% | 11 September 2012 |
72 more providers hold smaller blocks.
Allocation data: Ofcom numbering data, as published 28 October 2026.
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Common Questions About 01433 Numbers
Where is the 01433 area code?
01433 is the dialling code for Hathersage. Numbers starting 01433 are landline numbers for that area. Internet phone services can use them too, so a caller is not necessarily in Hathersage.
Is 01433 a mobile number?
No. 01433 is a landline (geographic) area code for Hathersage. UK mobile numbers start with 07.
Who does the 01433 range belong to?
Ofcom has allocated 01433 numbers to 78 providers. The largest holders are BT, Vodafone Ltd (C&W) and Digital Space Group Limited. Numbers can be moved (ported) between networks, so the network a caller uses today may not be the one Ofcom allocated the block to. The allocation does not identify the person or business using a number.
Who called me from a 01433 number?
We can't tell you who called. An area code only shows the type of number and which provider Ofcom allocated the range to. If you don't recognise a 01433 number, don't call back in a hurry, and never give out bank details or security codes on a call you didn't expect.
Block the number from your phone's recent calls list. Forward scam texts free to 7726, report unwanted marketing calls to the ICO, and see Ofcom's advice on scam calls.