All postcodes in IP11 1
| Postcode | Place | Type |
|---|---|---|
| IP11 1AY | Felixstowe | large user |
| IP11 1BS | Felixstowe | large user |
| IP11 1DA | Felixstowe | large user |
| IP11 1DG | Felixstowe | large user |
Postcodes in sector IP11 1
Sector IP11 1 is part of the IP11 district in Felixstowe. All 4 of its live postcodes are listed below.