The IP postcode area, also known as the Ipswich postcode area, is a group of 33 postcode districts in England, which are subdivisions of 15 post towns. These postcode districts cover most of Suffolk, including Ipswich, Bury St Edmunds, Aldeburgh, Brandon, Eye, Felixstowe, Halesworth, Leiston, Saxmundham, Southwold, Stowmarket and Woodbridge, plus southern Norfolk, including Thetford, Diss and Harleston.