NR postcode district map, Norwich
Supplier statuses last checked .
The NR postcode area covers 36 districts and 24,304 live postcodes, from NR1 to NR99. It is centred on Norwich and also covers Loddon, Lowestoft, Dereham, Gorleston-on-Sea and Attleborough.
Districts here average 675 postcodes.
Where the NR districts sit
7 districts are plotted without a label where labels would overlap; every one is in the table below.
Where NR sits
It falls across Norfolk and Suffolk.
Water supply across NR
All 36 NR districts are supplied by Anglian Water, which is notable at this size: an area with this many districts usually crosses at least one supply boundary, and this one does not.
Anglian Water has a hosepipe ban in force from 11 July 2026, covering the whole of NR.
The shape of the NR area
The districts are wildly uneven: NR31 holds 1,193 postcodes around Gorleston-on-Sea and NR99 holds 7, a ratio of about 170 to one. They divide into 115 sectors.
No single district dominates: the largest holds only about 5 per cent of the area's postcodes.
The numbering is not continuous. NR runs up to 99 but has only 36 districts, so 63 numbers are unused:.
Several districts share a settlement, which is a common source of confusion when a form rejects an address: NR1, NR2, NR3, NR4, NR5, NR6, NR7, NR8 and NR99 all point at Norwich, NR13 and NR14 all point at Loddon and NR16 and NR17 all point at Attleborough.
What borders NR
NR sits next to IP (Ipswich) to the south, PE (Peterborough) to the west, CO (Colchester) to the south, CB (Cambridge) to the south west and CM (Chelmsford) to the south west.
NR districts, settlements and water supply
Principal settlement is the town or city each district sits in or nearest to, derived from OS Open Names. It is not the Royal Mail post town, which is licensed data and not published openly. Status is resolved live from each company’s own notice.
Water hardness in NR
No water company covering NR publishes hardness figures as open data. The gap is named per district below so you know who to ask.
| District | Hardness | As published | Supply zone | Published by |
|---|---|---|---|---|
| NR1 | Not published by Anglian Water. Check with your supplier. | |||
| NR2 | Not published by Anglian Water. Check with your supplier. | |||
| NR3 | Not published by Anglian Water. Check with your supplier. | |||
| NR4 | Not published by Anglian Water. Check with your supplier. | |||
| NR5 | Not published by Anglian Water. Check with your supplier. | |||
| NR6 | Not published by Anglian Water. Check with your supplier. | |||
| NR7 | Not published by Anglian Water. Check with your supplier. | |||
| NR8 | Not published by Anglian Water. Check with your supplier. | |||
| NR9 | Not published by Anglian Water. Check with your supplier. | |||
| NR10 | Not published by Anglian Water. Check with your supplier. | |||
| NR11 | Not published by Anglian Water. Check with your supplier. | |||
| NR12 | Not published by Anglian Water. Check with your supplier. | |||
| NR13 | Not published by Anglian Water. Check with your supplier. | |||
| NR14 | Not published by Anglian Water. Check with your supplier. | |||
| NR15 | Not published by Anglian Water. Check with your supplier. | |||
| NR16 | Not published by Anglian Water. Check with your supplier. | |||
| NR17 | Not published by Anglian Water. Check with your supplier. | |||
| NR18 | Not published by Anglian Water. Check with your supplier. | |||
| NR19 | Not published by Anglian Water. Check with your supplier. | |||
| NR20 | Not published by Anglian Water. Check with your supplier. | |||
| NR21 | Not published by Anglian Water. Check with your supplier. | |||
| NR22 | Not published by Anglian Water. Check with your supplier. | |||
| NR23 | Not published by Anglian Water. Check with your supplier. | |||
| NR24 | Not published by Anglian Water. Check with your supplier. | |||
| NR25 | Not published by Anglian Water. Check with your supplier. | |||
| NR26 | Not published by Anglian Water. Check with your supplier. | |||
| NR27 | Not published by Anglian Water. Check with your supplier. | |||
| NR28 | Not published by Anglian Water. Check with your supplier. | |||
| NR29 | Not published by Anglian Water. Check with your supplier. | |||
| NR30 | Not published by Anglian Water. Check with your supplier. | |||
| NR31 | Not published by Anglian Water. Check with your supplier. | |||
| NR32 | Not published by Anglian Water. Check with your supplier. | |||
| NR33 | Not published by Anglian Water. Check with your supplier. | |||
| NR34 | Not published by Anglian Water. Check with your supplier. | |||
| NR35 | Not published by Anglian Water. Check with your supplier. | |||
| NR99 | Not published by Anglian Water. Check with your supplier. | |||
Hardness is published per census area, not per postcode, so these figures characterise a district rather than measuring one address. They are a scale and taste matter, not a safety one. Hardness data version wessex-water@2022-2025+yorkshire-water@2026.
Download the NR data
No signup, no email wall. GeoJSON carries the district points, the supplier and the live status, so it can be dropped straight into a map.
District positions are averaged postcode centroids from OS Code-Point Open. They show roughly where a district sits, not where its boundary runs, and are not legal boundaries.
Frequently asked questions
How many postcode districts are in the NR area?
There are 36 NR postcode districts, running from NR1 to NR99, and they contain 24,304 live postcodes across 115 sectors.
What towns does the NR postcode area cover?
NR covers Norwich, Loddon, Lowestoft, Dereham, Gorleston-on-Sea and Attleborough. The area takes its name from Norwich, and each district is listed with its settlement in the table on this page.
Which water company supplies NR postcodes?
Anglian Water supplies all 36 NR districts. Supply boundaries follow the pipe network rather than postcode geography, so confirm against your water bill if you are near the edge of the area.
Why do NR1 and NR2 both say Norwich?
NR1, NR2, NR3, NR4, NR5, NR6, NR7, NR8 and NR99 all serve Norwich, covering different parts of it. A single town routinely needs more than one postcode district once it passes a few thousand delivery points, so this is normal rather than an error in an address.
Can I download a free NR postcode map?
Yes. This page offers the NR districts as GeoJSON, CSV and SVG, free and with no signup or email address required. The GeoJSON carries each district's position, its water company and its current restriction status, so it can be dropped straight into a mapping tool.
Why is the NR area called Norwich when it covers Gorleston-on-Sea?
NR takes its letters from Norwich, where the sorting office that served the area was based when the code was allocated. Gorleston-on-Sea is the largest settlement in the area today, in NR31, but the area code follows the historic sorting geography rather than current population.
Which councils cover the NR postcode area?
NR reaches into Norfolk and Suffolk. A postcode area is not a council area: they were drawn for different purposes and a single district can sit across a council boundary, so your postcode does not tell you which authority you pay.