CH99 Chester Postcode district CH99: 2 named streets and 17 live postcodes, in Cheshire West and Chester. Streets Lakeside, Chester Station Road, Chester Postcodes CH99 9AA CH99 9AB CH99 9DB CH99 9DS CH99 9FB CH99 9FS CH99 9LP CH99 9LS CH99 9NA CH99 9NB CH99 9NL CH99 9PL CH99 9QG CH99 9QW CH99 9ST CH99 9WB CH99 9YZ Source: ONS Postcode Directory (live postcodes only) and OS Open Linked Identifiers for the streets.