01559 Area Code
The dialling code for Llandysul: what 01559 numbers are, who holds them, and what to do about a call you don't recognise.
What Is the 01559 Area Code?
Llandysul landline number. 01559 is the dialling code for Llandysul. Numbers starting 01559 are landline numbers for that area. Internet phone services can use them too, so a caller is not necessarily in Llandysul.
Who was the range allocated to?
Ofcom has allocated 01559 numbers to 79 providers. The largest holders are BT, Gamma Telecom Holdings Limited 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 01559 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 01559 Range
| Number type | Llandysul landline number |
|---|---|
| Area | Llandysul |
| Number format | 01559 XXXXXX |
| Allocated by Ofcom | 35% of the range, to 79 providers |
| First allocation on record | 15 July 1994 |
| Most recent allocation | 26 January 2026 |
Largest holders of 01559 numbers
| Provider (as allocated by Ofcom) | Share of range | First allocated |
|---|---|---|
| BT | 4% | 15 July 1994 |
| Gamma Telecom Holdings Limited | 2% | 24 May 2005 |
| Digital Space Group Limited | 1% | 14 May 2008 |
| GCI Network Solutions Limited | 1% | 2 May 2017 |
| (Aq) Limited | 1% | 11 September 2012 |
| AQL Wholesale Ltd | 1% | 3 January 2008 |
73 more providers hold smaller blocks.
Allocation data: Ofcom numbering data, as published 28 October 2026.
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Common Questions About 01559 Numbers
Where is the 01559 area code?
01559 is the dialling code for Llandysul. Numbers starting 01559 are landline numbers for that area. Internet phone services can use them too, so a caller is not necessarily in Llandysul.
Is 01559 a mobile number?
No. 01559 is a landline (geographic) area code for Llandysul. UK mobile numbers start with 07.
Who does the 01559 range belong to?
Ofcom has allocated 01559 numbers to 79 providers. The largest holders are BT, Gamma Telecom Holdings Limited 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 01559 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 01559 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.