| Postcode | Coverage Area |
| CB10 | Ashdon, Church End, Great Chesterford, Great Sampford, Hempstead, Hinxton, Howlett End, Ickleton, Little Chesterford, Little Sampford, Little Walden, Radwinter, Red Oaks Hill, Saffron Walden, Sewards |
| CB11 | Arkesden, Audley End, Clavering, Debden, Debden Green, Duddenhoe End, Elmdon, Langley, Littlebury, Littlebury Green, Newport, Pond Street, Quendon, Rickling, Rickling Green, Shortgrove, Starlings Gree |
| CB21 | Fulbourn, Great And Little Wilbraham, West Wratting, Weston Colville, Teversham (Parts Of), Abington (Incl. Little), Hildersham, Bartlow, Hadstock, Horseheath, Shudy Camps, West Wickham, Castle Camps, |
| CM1 | Chelmsford,Writtle |
| CM3 | Hatfield Peverel,South Woodham Ferrers,North Fambridge,Cold Norton,Boreham,Maylandsea |
| CM6 | Great Dunmow,Felsted |
| CM7 | Braintree,Finchingfield,Great Bardfield |
| CM17 | Harlow,Old Harlow,Matching,Matching Tye,Matching Green,Church Langley |
| CM22 | Bishops Stortford,Sheering |
| CM23 | Bishops Stortford,Thorley,Manuden |
| CM24 | Stansted Mountfitchet,Stansted Airport |
| CM77 | Braintree,Great Notley,Rayne |
| SG8 | Royston,Abington Pigotts,Arrington,Barkway,Barley,Bassingbourn,Chrishall,Croydon,Fowlmere,Great Chishill,Guilden Morden,Heydon,Kelshall,Kneesworth,Litlington,Little Chishill,Melbourn,Meldreth,New Wimp |