The 01883 area code: Caterham
01883 is the UK dialling code for Caterham. It is a geographic landline code, so calling it costs the same as any other UK landline number and is usually included in call allowances.
Built from Ofcom numbering data, last refreshed 2026-07-24.
01883 at a glance
- Area
- Caterham
- Number format
- (01883) XXX XXX, usually 6-digit local numbers
- Calling from abroad
- +44 1883 then the local number, dropping the first 0
- Call cost
- Standard UK landline rate, usually included in call allowances
Getting calls from a 01883 number?
01883 is a legitimate geographic code, so most calls from it are ordinary: local businesses, surgeries, schools, councils and households in the Caterham area. Two things are worth knowing before you call back.
First, caller display can be faked. Scammers spoof real UK area codes to look local, so a 01883 number on your screen is not proof the call came from Caterham. Second, the safe habit is simple: if a caller you were not expecting asks for personal or payment details, hang up and ring the organisation back on a number you found independently.
Checking a full number rather than just the code? Try our free UK phone number checker, which identifies the area and original provider of any UK number from Ofcom data.
Who issues 01883 numbers?
Ofcom allocates 01883 numbers to communications providers in blocks. These providers currently hold the most number blocks in the Caterham area:
- Vodafone Ltd (C&W) - 19 number blocks
- BT - 11 number blocks
- Barritel Limited - 9 number blocks
- Gamma Telecom Holdings Limited - 8 number blocks
- Magrathea Telecommunications Limited - 7 number blocks
163 blocks allocated in total. The provider a number was first issued to is not necessarily who serves it today, because numbers move between providers when ported.
Get a 01883 number for your business
A Caterham number makes your business local to the people searching for it, wherever you actually answer the phone. ONSIM supplies 01883 numbers two ways: a virtual number that diverts to any phone from £5 a month, or on a Landline SIM from £10 a month so your mobile rings and dials as the 01883 number, with call recording available for regulated trades.
Already have a 01883 number? You can bring it with you. Porting in is included on Landline SIM plans, or a one-off £20 + VAT on Virtual Landline.
Not sure which number type fits? Two minutes with the business number chooser will tell you.
01883 area code questions
Where is the 01883 area code?
01883 is the dialling code for Caterham. The code and the areas it serves are set by Ofcom, the UK communications regulator.
How much does it cost to call a 01883 number?
01883 numbers are standard UK geographic landline numbers, charged at the same rate as any other 01 or 02 number. Most mobile and landline tariffs include them in inclusive minutes, so the call usually costs nothing extra. From abroad, dial +44 1883 followed by the local number, charged at your provider's international rate to the UK.
Why am I getting calls from a 01883 number?
Most calls from 01883 numbers are exactly what they look like: a business, GP surgery, school or household in the Caterham area. But caller display can be faked, a practice called spoofing, so an unexpected call showing 01883 is not proof the caller is really local. If a caller asks for personal or payment details, hang up and call the organisation back on a number you found yourself, for example from its website or a bill.
Can I get a 01883 number for my business?
Yes. You do not need an office in Caterham or a phone line from the dominant local provider. ONSIM can supply a 01883 number that diverts to any phone from £5 a month, or put it on a business SIM so your mobile makes and receives calls as the 01883 number. Existing 01883 numbers can be ported in: porting is included on Landline SIM plans, or a one-off £20 + VAT on Virtual Landline.