MK3 postcode district

Postcodes and sectors

660 of the district's 891 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 51.99312, -0.75217, which locates the district, not a building.

Companies registered in MK3

Companies House lists 1,317 companies with a registered office in MK3; 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 MK3

• South East
• Bletchley
• Milton Keynes
• Buckinghamshire

Roads filed under MK3

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.

• Aberdeen Close
• Ainsdale Close
• Aintree Close
• Alderney Avenue
• Alford Place
• Andoco Grove
• Anglesey View
• Angus Drive
• Annet Place
• Antigua Way
• Arbroath Close
• Archers Wells
• Arran Way
• Arthur Cox Crescent
• Aruba Close
• Arundel Grove
• Ascension Gardens
• Ascot Place
• Ashburnham Close
• Ashridge Close
• Avon Grove
• Aydon Court
• Ayr Way
• Banburies Close
• Barbados Row
• Beaverbrook Court
• Beechcroft Road
• Berwick Drive
• Birkdale Close
• Birnbeck Avenue
• Blaydon Close
• Bolton Close
• Bonaire Grange
• Bosworth Close
• Bramber Close
• Brooke Close
• Browning Crescent
• Buckfast Avenue
• Buckingham Road
• Bunkers Crescent
• Burgh Drive
• Burns Road
• Bushy Close
• Bute Brae
• Byron Close
• Caernarvon Crescent
• Caithness Court
• Calder Vale
• Calluna Drive
• Camber Close
• Cam Court
• Canvey Way
• Cardigan Close
• Carnoustie Grove
• Cartmel Close
• Cathay Close
• Cayman Walk
• Chapel Rise
• Chaucer Road
• Cheltenham Gardens

Check an address in MK3

Check an address in MK3

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=MK3" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about MK3

What does an MK3 postcode tell you?

That the address lies in the MK3 district of the MK (Milton Keynes) postcode area, and the place OS Open Names most often lists first for its postcodes is Bletchley. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 660 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 MK3

• MK21.9 km
• MK12.3 km
• MK42.6 km
• MK53.8 km
• MK174.0 km
• MK64.1 km
• MK75.1 km
• MK95.3 km
• MK85.9 km
• MK106.6 km
• MK137.0 km
• MK157.3 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids