Cambridge falls within the CB postal code area, which covers most of Cambridgeshire and some adjoining parts of Suffolk and Essex. The city of Cambridge itself falls within the CB1 to CB5 postcodes.
The CB1 postcode accounts for central and south Cambridge; it also extends outside Cambridge to encompass parts of the village of Teversham, which is less than a kilometer from Cambridge. CB2 accounts for western Cambridge, while CB3 covers northwest Cambridge and also takes in the nearby village of Girton. The CB4 postcode applies to northern Cambridge, and finally CB5 accounts for the eastern portion of the city.