| Code | Name | Region |
|---|---|---|
| GBCTE | Chester-le-street | DUR |
| GBCER | Chesterton | STS |
| GBCVY | Cheveley | CAM |
| GBCVG | Chevington | SFK |
| GBCST | Chichester | WSX |
| GBCKR | Chickerell | DOR |
| GBCMC | Chartham Hatch | KEN |
| GBCHS | Chasetown | STS |
| GBCTM | Chatham | KEN |
| GBCTI | Chathill | NBL |
| GBCCS | Chatteris | CAM |
| GBCHA | Cheadle | SKP |
| GBCDL | Cheadle | STS |
| GBCEH | Cheadle Heath | MAN |
| GBCDH | Cheadle Hulme | SKP |
| GBCME | Cheam | SRY |
| GBCHC | Checkendon | OXF |
| GBXDB | Chedburgh | SFK |
| GBCDA | Cheddar | SOM |
| GBCDX | Cheddington | BKM |
| GBCTW | Cheddleton | STS |
| GBCH6 | Chedworth | GLS |
| GBCEE | Cheetham Hill | MAN |
| GBCHZ | Chelford | CHE |
| GBCHX | Chellaston/derby | DBY |
| GBCFD | Chelmsford | ESS |
| GBAFR | Chalford | GLS |
| GBCGV | Chalgrove | OXF |
| GBCTQ | Chalton | BDF |
| GBCFO | Chandlers Ford | HAM |
| GBCPP | Chapel Allerton | SOM |
| GBCPL | Chapel En Le Frith | DBY |
| GBCPD | Chapel Saint Leonards | LIN |
| GBCPW | Chapeltown | SHF |
| GBCZT | Chard | SOM |
| GBCHG | Charing | KEN |
| GBCEO | Charlecote | WAR |
| GBCHD | Charleston | ANS |
| GBCHF | Charlestown | CON |
| GBCWN | Charlestown | FIF |
| GBZWN | Charlestown Of Aberlour | MRY |
| GBCHN | Charlton | BST |
| GBCAW | Charlwood | SRY |
| GBCHJ | Charmouth | DOR |
| GBCNR | Charnock Richard | LAN |
| GBCHM | Chartham | KEN |
| GBCWS | Cawston | NFK |
| GBAWH | Cawthorne | BNS |
| GBCTP | Caythorpe | LIN |
| GBCAG | Ceann A Gharaidh, Eriskay | ELS |