What does a BN99 postcode tell you?

That the address lies in the BN99 district of the BN (Brighton) postcode area, and the place OS Open Names most often lists first for its postcodes is Lancing. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 492 live postcodes.

BN99 postcode district

BN99, in the BN (Brighton) postcode area, has 492 live and 92 terminated postcodes in the ONS Postcode Directory of August 2026, and OS Open Names files no road under it.

postcode area	BN (Brighton)
live postcodes	492
terminated postcodes	92
sectors	5
roads listed	0
companies registered	145
centroid	50.82366, -0.35600
directory release	2026-08

Postcodes and sectors

492 of the district's 584 postcodes are live in the ONS Postcode Directory of August 2026. A postcode directory says whether a code is in use, never who is there. The live postcodes centre on 50.82366, -0.35600, which locates the district, not a building.

sector	live	terminated
BN99 3	6	18
BN99 4	59	3
BN99 6	86	34
BN99 8	225	18
BN99 9	116	19

Companies registered in BN99

Companies House lists 145 companies with a registered office in BN99; none of them at an address shared by 25 or more companies (1 October 2026 snapshot). 25 is the count at which the address lookup reports a company cluster.

Places OS Open Names lists for BN99

West Sussex
South East
Lancing
Adur
Worthing

Roads filed under BN99

OS Open Names files no road under BN99, so a street here cannot be confirmed from the register and the lookup answers about the postcode alone.

Check an address in BN99

Common questions about BN99

What does a BN99 postcode tell you?: That the address lies in the BN99 district of the BN (Brighton) postcode area, and the place OS Open Names most often lists first for its postcodes is Lancing. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 492 live postcodes.

Where the counts come from

ons-postcode-directory · version 2026-08 · Contains ONS, OS and Royal Mail data © Crown copyright and database right 2026, Open Government Licence v3.0. Northern Ireland postcodes are excluded: their reuse needs a Land & Property Services licence.
os-open-names · version 2026-11-01 · Contains OS data © Crown copyright and database right 2026, Open Government Licence v3.0.
uk-companies-house · version 2026-10-01 · Companies House free company data product, Open Government Licence v3.0

What each figure means, and what a district page never says, is set out in Reading a British postcode district page; the glossary defines a postcode district, a postcode area, a postcode directory and a street register.

Data synced on 2026-11-01: the newest version among the datasets listed above.

Districts nearest BN99

BN111.9 km
BN142.2 km
BN152.3 km
BN134.0 km
BN125.3 km
BN436.4 km
BN447.8 km
BN428.7 km
BN169.8 km
BN419.9 km
BN312.6 km
BN1713.0 km
Every district
How a British address is written
Check any address

distance between the districts' centroids

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