PE21 1 postcode sector in the PE21 district

PE21 1 is a sector of the PE21 district: every postcode that starts PE21 1. It has 33 postcodes in use, 15 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 PE21 1 sector, and which are new since 2020

Map of every postcode in the PE21 1 sector, by new since 2020 Of the 33 postcodes in the PE21 1 sector that ONS places, 10 are new since 2020 and 23 were in use before 2020. One group of new postcodes is outlined: 10 new postcodes since 2020. Places named: Boston. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A16A52 PE21 1SA: before 2020PE21 1ZZ: before 2020PE21 1GA: new since 2020 Boston 10 new postcodes since 2020, outlined: this goes to PE21 1HA, the newest of them10 new postcodes since 2020 Map of every postcode in the PE21 1 sector, by new since 2020 Of the 33 postcodes in the PE21 1 sector that ONS places, 10 are new since 2020 and 23 were in use before 2020. One group of new postcodes is outlined: 10 new postcodes since 2020. Places named: Boston. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A16 Boston
  • New since 2020: 10
  • In use before 2020: 23
  • Outline: where 5 or more new postcodes since 2020 lie together

Of the 33 postcodes in the PE21 1 sector that ONS places, 10 are new since 2020 and 23 were in use before 2020.

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. New since 2020 means it came into use in January 2020 or later. A dashed outline shows where 5 or more lie within 600 metres of each other. It is not a boundary, and no boundary is drawn. Where marks overlap, the one first in the key is drawn; the counts include every postcode.

Sources: ONS Postcode Directory, August 2026, loaded 20 October 2026; roads, rivers and built-up areas: Ordnance Survey open maps. 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.

The 5 newest postcodes

PE21 1HAJuly 2026PE21 1HBJuly 2026PE21 1GZJune 2026PE21 1GYMay 2026PE21 1GXApril 2026

Where the new postcodes lie together

  • 10 new postcodes since 2020, outlined on the map. PE21 1HA, is the newest of them.

Postcodes in PE21 1

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.

PE21 1BZPE21 1EUPE21 1FLPE21 1GAPE21 1GBPE21 1GSPE21 1GTPE21 1GWPE21 1GXPE21 1GYPE21 1GZPE21 1HAPE21 1HBPE21 1SAPE21 1SBPE21 1SDPE21 1SEPE21 1SFPE21 1SGPE21 1SHPE21 1SJPE21 1SLPE21 1SNPE21 1SPPE21 1SQPE21 1SRPE21 1SSPE21 1STPE21 1SUPE21 1SWPE21 1SYPE21 1SZPE21 1ZZ

Source: ONS Postcode Directory, August 2026, loaded 20 October 2026. Postcodes that have ended are not listed.

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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Where the facts on this page come from

Licence: Open Government Licence v3.0.

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