The postal area IP (Ipswich) comprises of the following post towns; these towns should be written in capital letters when used in addresses.

Country	Post Town	Postal District
England	Ipswich	IP1 IP2 IP3 IP4 IP5 IP6 IP7 IP8 IP9 IP10
	Felixstowe	IP11
	Woodbridge	IP12 IP13
	Stowmarket	IP14
	Aldeburgh	IP15
	Leiston	IP16
	Saxmundham	IP17
	Southwold	IP18
	Halesworth	IP19
	Harleston	IP20
	Diss	IP21 IP22
	Eye	IP23
	Thetford	IP24 IP25 IP26
	Brandon	IP27
	Bury St. Edmunds	IP28 IP29 IP30 IP31 IP32 IP33

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