What does an SL0 postcode tell you?

That the address lies in the SL0 district of the SL (Slough) postcode area, and the place OS Open Names most often lists first for its postcodes is Iver Heath. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 345 live postcodes.

SL0 postcode district

SL0, in the SL (Slough) postcode area, has 345 live and 194 terminated postcodes in the ONS Postcode Directory of August 2026, and OS Open Names files 127 roads under it.

postcode area	SL (Slough)
live postcodes	345
terminated postcodes	194
sectors	3
roads listed	127
companies registered	1,434
centroid	51.52603, -0.51696
directory release	2026-08

Postcodes and sectors

345 of the district's 539 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 51.52603, -0.51696, which locates the district, not a building.

sector	live	terminated
SL0 0	190	88
SL0 1	2	11
SL0 9	153	95

Companies registered in SL0

Companies House lists 1,434 companies with a registered office in SL0; 210 of them at addresses 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 SL0

South East
Buckinghamshire
Iver Heath
Iver
Richings Park
Shreding Green
Thorney
London
Slough

Roads filed under SL0

Named roads first, then numbered ones. A road is filed under one district even where it runs through several, so a street missing here may be listed under a neighbouring district — which is why the address lookup never calls a British street absent. Great Britain has no open register of buildings, so a listed road never means a building on it exists.

Addison Close
Alderbourne Lane
Alder Road
Anslow Gardens
Apsley Walk
Ashford Road
Bangors Close
Bangors Road North
Bangors Road South
Barnes Way
Barnfield
Bathurst Close
Bathurst Walk
Bellswood Lane
Billet Lane
Birch Close
Blythe Close
Bond Close
Cecil Road
Cedar Close
Chequers Orchard
Cherry Close
Cherrytree Lane
Church Road
Colborne Close
Colne Orchard
Coopers Row
Coppins Lane
Copse Wood
Court Lane
Delaford Close
Denham Road
Dutton Way
Evreham Road
Firs Close
Ford Lane
Foxcroft
Gilliatt Close
Glaisyer Way
Grange Way
Grosvenor Close
Hardings Close
Hardings Row
Hawthorn Close
Heatherden Green
Heath Way
High Street
Hollow Hill Lane
Hollybush Lane
Holmsdale Close
Honeysuckle Close
Iverdale Close
Iver Lane
Iver Lodge
Keensacre
Kings Way
Langley Park Road
Laurels Road
Leacroft Road
Leas Drive

all 127 roads

Linden Close
Longstone Road
Lossie Drive
Love Green Lane
Love Lane
Lower Mead
Main Drive
Mansion Lane
Marina Way
Martindale
Norfolk Close
North Park
Northumberland Walk
Norwood Lane
Oak End Drive
Old Orchard
Old Slade Lane
Palmer's Moor Lane
Pinewood Close
Pinewood Green
Pinewood Road
Post Meadow
Potters Cross
Reed Close
Richings Place
Richings Way
Ridge Way
Rostrevor Gardens
Rowan Gardens
Sevenhills Road
Slough Road
Somerset Way
St David's Close
St James Walk
St Leonards Walk
St Margaret's Close
St Margaret's Gate
Stonecroft Avenue
Swallowdale
Swallow Fields
Swallow Street
Swan Road
Syke Cluan
Syke Ings
The Close
The Parkway
The Poynings
The Ridings
The Starlings
Thornbridge Road
Thorney Lane North
Thorney Lane South
Thorney Mill Road
Trewarden Avenue
Uxbridge Road
Victoria Crescent
Ward Close
Warren Field
Wellesley Avenue
West Square
Whitehouse Way
Widecroft Road
Woodcock Way
Woodland Grange
Wood Lane
Wood Lane Close
A4007

Check an address in SL0

The same road list through the API, from the outward code alone:

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=SL0" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about SL0

What does an SL0 postcode tell you?: That the address lies in the SL0 district of the SL (Slough) postcode area, and the place OS Open Names most often lists first for its postcodes is Iver Heath. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 345 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 SL0

UB83.2 km
SL33.9 km
UB74.1 km
UB115.1 km
UB105.2 km
SL26.2 km
UB36.8 km
UB96.9 km
SL17.3 km
UB47.5 km
TW67.8 km
TW198.1 km
Every district
How a British address is written
Check any address

distance between the districts' centroids

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