BN postcode district map, Brighton and Hove
Supplier statuses last checked .
The BN postcode area covers 37 districts and 22,567 live postcodes, from BN1 to BN99. It is centred on Brighton and Hove and also covers Worthing, Eastbourne, Littlehampton, Lewes and Shoreham-by-Sea.
Districts here average 610 postcodes.
Where the BN districts sit
15 districts are plotted without a label where labels would overlap; every one is in the table below.
Where BN sits
It falls across East Sussex, West Sussex and The City of Brighton and Hove.
Water supply across BN
All 37 BN districts are supplied by Southern 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.
No hosepipe ban currently applies anywhere in BN.
The shape of the BN area
The districts are wildly uneven: BN2 holds 1,608 postcodes around Brighton and Hove and BN95 holds 1, a ratio of about 1608 to one. They divide into 130 sectors.
The numbering is not continuous. BN runs up to 99 but has only 37 districts, so 62 numbers are unused:.
Several districts share a settlement, which is a common source of confusion when a form rejects an address: BN1, BN2, BN3, BN50, BN52 and BN88 all point at Brighton and Hove, BN11, BN12, BN13, BN14, BN95 and BN99 all point at Worthing and BN20, BN21, BN22 and BN23 all point at Eastbourne.
BN91 is a non-geographic district: it carries no coordinates because it is used for PO boxes and large users rather than for streets. It appears in the table below but cannot be placed on the map.
What borders BN
BN sits next to RH (Redhill) to the north, TN (Royal Tunbridge Wells) to the north east, CR (Warlingham) to the north, SM (Ewell) to the north and GU (Guildford) to the north west.
BN districts, settlements and water supply
| District | Principal settlement | Water company | Hosepipe ban status |
|---|---|---|---|
| BN1 | Brighton and Hove | Southern Water / South East Water | Depends on your supplier |
| BN2 | Brighton and Hove | Southern Water / South East Water | Depends on your supplier |
| BN3 | Brighton and Hove | Southern Water / South East Water | Depends on your supplier |
| BN5 | Steyning | Southern Water / South East Water | Depends on your supplier |
| BN6 | Burgess Hill | Southern Water / South East Water | Depends on your supplier |
| BN7 | Lewes | Southern Water / South East Water | Depends on your supplier |
| BN8 | Lewes | Southern Water / South East Water | Depends on your supplier |
| BN9 | Newhaven | Southern Water / South East Water | Depends on your supplier |
| BN10 | Peacehaven | Southern Water / South East Water | Depends on your supplier |
| BN11 | Worthing | Southern Water / South East Water | Depends on your supplier |
| BN12 | Worthing | Southern Water / South East Water | Depends on your supplier |
| BN13 | Worthing | Southern Water / South East Water | Depends on your supplier |
| BN14 | Worthing | Southern Water / South East Water | Depends on your supplier |
| BN15 | Shoreham-by-Sea | Southern Water / South East Water | Depends on your supplier |
| BN16 | Littlehampton | Southern Water / South East Water | Depends on your supplier |
| BN17 | Littlehampton | Southern Water / South East Water | Depends on your supplier |
| BN18 | Arundel | Southern Water / South East Water | Depends on your supplier |
| BN20 | Eastbourne | Southern Water / South East Water | Depends on your supplier |
| BN21 | Eastbourne | Southern Water / South East Water | Depends on your supplier |
| BN22 | Eastbourne | Southern Water / South East Water | Depends on your supplier |
| BN23 | Eastbourne | Southern Water / South East Water | Depends on your supplier |
| BN24 | Polegate | Southern Water / South East Water | Depends on your supplier |
| BN25 | Seaford | Southern Water / South East Water | Depends on your supplier |
| BN26 | Polegate | Southern Water / South East Water | Depends on your supplier |
| BN27 | Hailsham | Southern Water / South East Water | Depends on your supplier |
| BN41 | Southwick | Southern Water / South East Water | Depends on your supplier |
| BN42 | Southwick | Southern Water / South East Water | Depends on your supplier |
| BN43 | Shoreham-by-Sea | Southern Water / South East Water | Depends on your supplier |
| BN44 | Steyning | Southern Water / South East Water | Depends on your supplier |
| BN45 | Southwick | Southern Water / South East Water | Depends on your supplier |
| BN50 | Brighton and Hove | Southern Water / South East Water | Depends on your supplier |
| BN51 | Peacehaven | Southern Water / South East Water | Depends on your supplier |
| BN52 | Brighton and Hove | Southern Water / South East Water | Depends on your supplier |
| BN88 | Brighton and Hove | Southern Water / South East Water | Depends on your supplier |
| BN91 | — | Southern Water / South East Water | Depends on your supplier |
| BN95 | Worthing | Southern Water / South East Water | Depends on your supplier |
| BN99 | Worthing | Southern Water / South East Water | Depends on your supplier |
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 BN
No water company covering BN 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 |
|---|---|---|---|---|
| BN1 | Not published by Southern Water. Check with your supplier. | |||
| BN2 | Not published by Southern Water. Check with your supplier. | |||
| BN3 | Not published by Southern Water. Check with your supplier. | |||
| BN5 | Not published by Southern Water. Check with your supplier. | |||
| BN6 | Not published by Southern Water. Check with your supplier. | |||
| BN7 | Not published by Southern Water. Check with your supplier. | |||
| BN8 | Not published by Southern Water. Check with your supplier. | |||
| BN9 | Not published by Southern Water. Check with your supplier. | |||
| BN10 | Not published by Southern Water. Check with your supplier. | |||
| BN11 | Not published by Southern Water. Check with your supplier. | |||
| BN12 | Not published by Southern Water. Check with your supplier. | |||
| BN13 | Not published by Southern Water. Check with your supplier. | |||
| BN14 | Not published by Southern Water. Check with your supplier. | |||
| BN15 | Not published by Southern Water. Check with your supplier. | |||
| BN16 | Not published by Southern Water. Check with your supplier. | |||
| BN17 | Not published by Southern Water. Check with your supplier. | |||
| BN18 | Not published by Southern Water. Check with your supplier. | |||
| BN20 | Not published by Southern Water. Check with your supplier. | |||
| BN21 | Not published by Southern Water. Check with your supplier. | |||
| BN22 | Not published by Southern Water. Check with your supplier. | |||
| BN23 | Not published by Southern Water. Check with your supplier. | |||
| BN24 | Not published by Southern Water. Check with your supplier. | |||
| BN25 | Not published by Southern Water. Check with your supplier. | |||
| BN26 | Not published by Southern Water. Check with your supplier. | |||
| BN27 | Not published by Southern Water. Check with your supplier. | |||
| BN41 | Not published by Southern Water. Check with your supplier. | |||
| BN42 | Not published by Southern Water. Check with your supplier. | |||
| BN43 | Not published by Southern Water. Check with your supplier. | |||
| BN44 | Not published by Southern Water. Check with your supplier. | |||
| BN45 | Not published by Southern Water. Check with your supplier. | |||
| BN50 | Not published by Southern Water. Check with your supplier. | |||
| BN51 | Not published by Southern Water. Check with your supplier. | |||
| BN52 | Not published by Southern Water. Check with your supplier. | |||
| BN88 | Not published by Southern Water. Check with your supplier. | |||
| BN91 | Not published by Southern Water. Check with your supplier. | |||
| BN95 | Not published by Southern Water. Check with your supplier. | |||
| BN99 | Not published by Southern 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 BN 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 BN area?
There are 37 BN postcode districts, running from BN1 to BN99, and they contain 22,567 live postcodes across 130 sectors.
What towns does the BN postcode area cover?
BN covers Brighton and Hove, Worthing, Eastbourne, Littlehampton, Lewes and Shoreham-by-Sea. The area takes its name from Brighton and Hove, and each district is listed with its settlement in the table on this page.
Which water company supplies BN postcodes?
Southern Water supplies all 37 BN 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 BN1 and BN2 both say Brighton and Hove?
BN1, BN2, BN3, BN50, BN52 and BN88 all serve Brighton and Hove, 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.
What is BN91 used for?
BN91 is a non-geographic postcode district. It is used for PO boxes and large users such as banks and government departments that receive enough mail to need their own code, so it has no streets and no position on a map.
Can I download a free BN postcode map?
Yes. This page offers the BN 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.
Which councils cover the BN postcode area?
BN reaches into East Sussex, West Sussex and The City of Brighton and Hove. 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.