CF46 postcode district: Treharris and around
CF46 is a postcode district in Wales, with 349 postcodes in use in 2 sectors. It has postcodes in Treharris, Nelson, Caerphilly and Trelewis. It is split between 2 councils: Merthyr Tydfil (253 postcodes) and Caerphilly (96).
- Postcodes in use
- 349
- Sectors
- 2
- Councils
- 2 councils
- Places
- 3 places
Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026. See all our data sources
Every postcode in CF46, and which are new since 2020
- New since 2020: 4
- In use before 2020: 345
Of the 349 postcodes in CF46 that ONS places, 4 are new since 2020 and 345 were in use before 2020.
Each mark is a postcode's centre point as ONS gives it, not a building. Press one to see its postcode and open its page. New since 2020 means it came into use in January 2020 or later. No boundary is drawn. Where marks overlap, the one first in the key is drawn; the counts include every postcode.
The middle of its postcodes: latitude 51.6647, longitude -3.3006. Open this area on OpenStreetMap
Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026, the centre point of each postcode; when each came into use: the same directory; roads, rivers and built-up areas: Contains OS data © Crown copyright and database right 2026. Drawn by us. Street map: Ordnance Survey, OS Open Zoomstack, Open Government Licence v3.0, drawn with MapLibre. How we use them
The 4 newest postcodes
What broadband can you get in CF46?
Ofcom reports on 347 of the 349 postcodes in CF46. At 121 of them every home and business can get gigabit broadband.
Ofcom gives each postcode's share of homes and businesses, not how many there are, so these count postcodes. Each postcode page has its own figures. A provider's checker answers for one address.
Check one address on Ofcom's checkerSource: Ofcom, Connected Nations, Spring 2026, data for January 2026, Open Government Licence v3.0. How we use it
What do homes sell for in CF46?
Homes in CF46 sold for a typical £165,000 in the 12 months to August 2026, across 142 sales, up 5.1% on the 12 months before, HM Land Registry's figures show.
- Detached £347,500 18 sales
- Semi-detached £210,000 49 sales
- Terraced £135,000 75 sales
Each bar is that kind's typical price, against the most expensive kind here.
Standard sales of homes at market value. A typical price is the median, the middle sale. Sales take weeks to be registered, so the last month or two are incomplete. Each postcode page gives the figure for its own postcode sector.
Source: HM Land Registry Price Paid Data, files dated 28 September 2026. Contains HM Land Registry data © Crown copyright and database right 2021. This data is licensed under the Open Government Licence v3.0. How we use it
Postcodes in CF46
Pick a sector, then a postcode. A sector is the district plus the next digit.
UK postcode format explainedPlaces in CF46
Towns and villages with postcodes in CF46, and how many each has here.
Who covers CF46
How many of the district's postcodes in use fall under each council, constituency and police force area.
Councils
What council am I in?Constituencies
- Merthyr Tydfil and Aberdare253
- Caerphilly96
Police force areas
- South Wales253
- Gwent96
Next to CF46
"Next to" is by number: the districts before and after CF46 in the CF area.
Check a postcode
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