The CH postcode area, also known as the Chester postcode area, is a group of postcode districts near the England/Wales border. Having previously roughly covered the former Chester district and present-day Flintshire county, postcodes for the Wirral Peninsula (CH41-CH66) were transferred to it in 1999 from the L postcode area. It includes Birkenhead, Chester, Ellesmere Port, Neston, Prenton and Wallasey in England and Bagillt, Buckley, Connah's Quay, Flint, Holywell and Mold in Wales.