Postcode CF3
Began +8 · Caerphilly, Wales
CF3 is the postcode of Began, Blacktown, Castleton and 6 other places in Caerphilly, Wales, United Kingdom. This list covers outward codes — the first half of a UK postcode, such as M9 or BN91 — not full postcodes.
- Postcode
- CF3
- County
- Caerphilly, Newport, Cardiff
- Country
- Wales
- Country
- United Kingdom
9 places with postcode CF3
| Place | County | Location |
|---|---|---|
| Began | Caerphilly | 51.524, -3.089 |
| Blacktown | Newport | 51.524, -3.089 |
| Castleton | Newport | 51.542, -3.076 |
| Llanrumney | Cardiff | 51.524, -3.089 |
| Marshfield | Newport | 51.534, -3.073 |
| Michaelston-y-Fedw | Newport | 51.524, -3.089 |
| Peterstone Wentlooge | Newport | 51.516, -3.056 |
| Rumney | Cardiff | 51.510, -3.124 |
| St Mellons | Cardiff | 51.517, -3.117 |
Near Cardiff
The nearest major city is Cardiff, about 8 km away.
Nearby postcodes
Frequently asked questions
Which places use postcode CF3?
Began, Blacktown, Castleton, Llanrumney, Marshfield, Michaelston-y-Fedw, Peterstone Wentlooge, Rumney, St Mellons.
Which county and country is CF3 in?
Caerphilly, Newport, Cardiff, Wales, United Kingdom.
What is the nearest major city to CF3?
Cardiff, about 8 km away.
Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.