NN12 9 postcode sector in the NN12 district

NN12 9 is a sector of the NN12 district: every postcode that starts NN12 9. It has 43 postcodes in use, 12 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 NN12 9 sector, and which are new since 2020

Map of every postcode in the NN12 9 sector, by new since 2020 Of the 43 postcodes in the NN12 9 sector that ONS places, 7 are new since 2020 and 36 were in use before 2020. One group of new postcodes is outlined: 7 new postcodes since 2020. One postcode lies beyond the edge and is listed under the map. Places named: Towcester. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. NN12 9SA: before 2020NN12 9ZZ: before 2020NN12 9BU: new since 2020 Towcester 7 new postcodes since 2020, outlined: this goes to NN12 9DT, the newest of them7 new postcodes since 2020 Map of every postcode in the NN12 9 sector, by new since 2020 Of the 43 postcodes in the NN12 9 sector that ONS places, 7 are new since 2020 and 36 were in use before 2020. One group of new postcodes is outlined: 7 new postcodes since 2020. One postcode lies beyond the edge and is listed under the map. Places named: Towcester. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. Towcester 7 new postcodes since 2020, outlined: this goes to NN12 9DT, the newest of them7 new postcodes since 2020
  • New since 2020: 7
  • In use before 2020: 36
  • Outline: where 5 or more new postcodes since 2020 lie together

Of the 43 postcodes in the NN12 9 sector that ONS places, 7 are new since 2020 and 36 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 150 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. 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; when each came into use: the same directory; 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 5 newest postcodes

NN12 9DTMay 2026NN12 9BZMarch 2024NN12 9DPOctober 2023NN12 9DJApril 2022NN12 9DEAugust 2021

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.

NN12 9TN

Where the new postcodes lie together

  • 7 new postcodes since 2020, outlined on the map. NN12 9DT, is the newest of them.

Postcodes in NN12 9

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.

NN12 9BTNN12 9BUNN12 9BXNN12 9BZNN12 9DANN12 9DENN12 9DJNN12 9DPNN12 9DTNN12 9SANN12 9SBNN12 9SDNN12 9SENN12 9SFNN12 9SGNN12 9SHNN12 9SJNN12 9SLNN12 9SNNN12 9SPNN12 9SQNN12 9SRNN12 9SSNN12 9STNN12 9SUNN12 9SWNN12 9SXNN12 9SYNN12 9SZNN12 9TANN12 9TBNN12 9TDNN12 9TENN12 9TFNN12 9TGNN12 9THNN12 9TJNN12 9TLNN12 9TNNN12 9TPNN12 9TQNN12 9TRNN12 9ZZ

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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