IP11 3 postcode sector in the IP11 district

IP11 3 is a sector of the IP11 district: every postcode that starts IP11 3. It has 48 postcodes in use, 7 of them large-user postcodes. A large-user postcode is one Royal Mail gives to a single address that gets a lot of mail.

Not sure what a sector is? UK postcode format explained.

Every postcode in the IP11 3 sector, by flood risk

Map of every postcode in the IP11 3 sector, by flood risk Of the 48 postcodes in the IP11 3 sector that ONS places, 1 have a home or business at high risk, 26 are at low risk at worst, 5 are at very low risk only and 16 are not on the Environment Agency's at-risk list. One postcode lies beyond the edge and is listed under the map. Places named: Western Felixstowe, Eastern Felixstowe. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A14A154 IP11 3AQ: not on the flood risk listIP11 3BW: not on the flood risk listIP11 3EB: not on the flood risk listIP11 3QE: not on the flood risk listIP11 3QL: not on the flood risk listIP11 3QQ: not on the flood risk listIP11 3QR: not on the flood risk listIP11 3QT: not on the flood risk listIP11 3QU: not on the flood risk listIP11 3QX: not on the flood risk listIP11 3SW: not on the flood risk listIP11 3YR: not on the flood risk listIP11 3BL: very low flood risk onlyIP11 3HE: very low flood risk onlyIP11 3HG: very low flood risk onlyIP11 3HZ: very low flood risk onlyIP11 3TY: very low flood risk onlyIP11 3AL: low flood risk at worstIP11 3BQ: low flood risk at worstIP11 3GA: low flood risk at worstIP11 3HH: low flood risk at worstIP11 3JB: low flood risk at worstIP11 3QW: low flood risk at worstIP11 3RF: low flood risk at worstIP11 3RX: low flood risk at worstIP11 3SA: low flood risk at worstIP11 3SD: low flood risk at worstIP11 3SE: low flood risk at worstIP11 3SF: low flood risk at worstIP11 3SH: low flood risk at worstIP11 3SN: low flood risk at worstIP11 3SS: low flood risk at worstIP11 3ST: low flood risk at worstIP11 3SU: low flood risk at worstIP11 3SY: low flood risk at worstIP11 3TG: low flood risk at worstIP11 3TX: low flood risk at worstIP11 3TZ: low flood risk at worstIP11 3UT: low flood risk at worstIP11 3UU: low flood risk at worstIP11 3TW: high flood risk Western FelixstoweEastern Felixstowe Map of every postcode in the IP11 3 sector, by flood risk Of the 48 postcodes in the IP11 3 sector that ONS places, 1 have a home or business at high risk, 26 are at low risk at worst, 5 are at very low risk only and 16 are not on the Environment Agency's at-risk list. One postcode lies beyond the edge and is listed under the map. Places named: Western Felixstowe, Eastern Felixstowe. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A14 Western FelixstoweEastern Felixstowe
  • A home or business at high risk: 1
  • At medium risk at worst: 0
  • At low risk at worst: 26
  • At very low risk only: 5
  • Not on the at-risk list: 16

Of the 48 postcodes in the IP11 3 sector that ONS places, 1 have a home or business at high risk, 26 are at low risk at worst, 5 are at very low risk only and 16 are not on the Environment Agency's at-risk list.

Each mark is a postcode's centre point as ONS gives it, not a building. Press one to see its postcode and open its page. No boundary is drawn. Where marks overlap, the one first in the key is drawn; the counts include every postcode. Names in italics are council wards: we hold no town or village names here.

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026, the centre point of each postcode; flood risk: Environment Agency, published 6 July 2026; roads, rivers and built-up areas: Contains OS data © Crown copyright and database right 2026. Drawn by us. Street map: Ordnance Survey, OS Open Zoomstack, Open Government Licence v3.0, drawn with MapLibre. How we use them

The postcodes at high risk

Beside each: how many of its homes and businesses the Environment Agency puts at that risk.

IP11 3TW7 at high risk

Further out, not drawn

This postcode lies well apart from the rest, so the map is drawn without it to show the rest closer; it is in every count.

IP11 3EQ

Postcodes in IP11 3

Pick a postcode to see its council and MP, broadband, flood risk, what homes sell for, council tax, the nearest schools and stations, and crime around it.

IP11 3ALIP11 3AQIP11 3BLIP11 3BQIP11 3BWIP11 3EBIP11 3EQIP11 3GAIP11 3GBIP11 3GEIP11 3GFIP11 3GGIP11 3HEIP11 3HGIP11 3HHIP11 3HZIP11 3JBIP11 3QEIP11 3QLIP11 3QNIP11 3QPIP11 3QQIP11 3QRIP11 3QTIP11 3QUIP11 3QWIP11 3QXIP11 3RFIP11 3RXIP11 3SAIP11 3SDIP11 3SEIP11 3SFIP11 3SHIP11 3SNIP11 3SSIP11 3STIP11 3SUIP11 3SWIP11 3SYIP11 3TGIP11 3TWIP11 3TXIP11 3TYIP11 3TZIP11 3UTIP11 3UUIP11 3YR

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026. Postcodes that have ended are not listed. See all our data sources

What council am I in? The council, borough or local authority for a postcode, and the county council where there is one. What ward am I in? The ward for a postcode, with its council, constituency and parish.

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