CO postcode area
The CO postcode area, also known as the Colchester postcode area, is a group of sixteen postcode districts in the east of England, within nine post towns. These cover northeast Essex and a small part of south Suffolk.
The main sorting office was in Colchester but as at 2021 there was no Mail Centre in Colchester.
Coverage
The approximate coverage of the postcode districts:! CO1
! CO2
! CO3
! CO4
! CO5
! CO6
! CO7
! CO8
! CO9
! CO10
! CO11
! CO12
! CO13
! CO14
! CO15
! CO16