Postcode district boundaries:
The CH postcode area, also known as the Chester postcode area, is a group of 37 postcode districts in north-west England and north-east Wales, which are subdivisions of thirteen post towns. These districts cover west Cheshire (including Chester, Neston and Ellesmere Port), south-west Merseyside (including Birkenhead, Prenton, Wallasey and Wirral) and east Flintshire (including Deeside, Flint, Buckley, Bagillt, Holywell and Mold).
|Postcode area name|
|Statistics as at May 2020|
The postcodes for the Wirral Peninsula were originally covered by the L postcode area, until they were transferred to the CH postcode area in 1999. The postcode numbers were unchanged, so L41 became CH41 and so on.
The approximate coverage of the postcode districts:
- "ONS Postcode Directory Version Notes" (ZIP). National Statistics Postcode Products. Office for National Statistics. May 2020. Table 2. Retrieved 19 June 2020. Coordinates from mean of unit postcode points, "Code-Point Open". OS OpenData. Ordnance Survey. February 2012. Retrieved 21 April 2012.
- Royal Mail, Address Management Guide, (2004)
- "Why we are changing postcodes – Royal Mail". Wirral Globe website. Newsquest Media Group. 18 March 1999. Archived from the original on 7 December 2008. Retrieved 29 May 2009.
- "RM non-geographical postcode list" (PDF).[permanent dead link]