B postcode district map, Birmingham
Supplier statuses last checked .
The B postcode area covers 78 districts and 41,844 live postcodes, from B1 to B99. It is centred on Birmingham and also covers Royal Sutton Coldfield, Solihull, Coleshill, Smethwick and Halesowen.
Districts here average 536 postcodes.
Where the B districts sit
48 districts are plotted without a label where labels would overlap; every one is in the table below.
Where B sits
It is administratively fragmented, reaching into Birmingham, Worcestershire, Warwickshire and Sandwell and 4 other authorities.
Water supply across B
All 78 B districts are supplied by Severn Trent, which is notable at this size: an area with this many districts usually crosses at least one supply boundary, and this one does not.
We are re-checking Severn Trent's status. It was last confirmed on 18 August 2026 as voluntary appeal, and until it is confirmed again this page does not assert a current position for it.
The shape of the B area
B31 is the largest district with 1,164 postcodes around Halesowen, and B40 the smallest with 14. The area divides into 262 postcode sectors.
No single district dominates: the largest holds only about 3 per cent of the area's postcodes.
The numbering is not continuous. B runs up to 99 but has only 78 districts, so 21 numbers are unused:.
Several districts share a settlement, which is a common source of confusion when a form rejects an address: B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, B11, B12, B13, B14, B15, B16, B18, B19, B20, B25, B29, B30, B38 and B99 all point at Birmingham, B23, B24, B35, B44, B72, B73, B74, B75 and B76 all point at Royal Sutton Coldfield and B26, B27, B28, B47, B90, B91, B92 and B93 all point at Solihull.
What borders B
B sits next to DY (Dudley) to the west, CV (Coventry) to the east, WS (Walsall) to the north, WV (Wolverhampton) to the north west and WR (Worcester) to the south west.
Its neighbours run in 5 different directions, so B is landlocked by other postcode areas on most sides.
B districts, settlements and water supply
| District | Principal settlement | Water company | Hosepipe ban status |
|---|---|---|---|
| B1 | Birmingham | Severn Trent / South Staffs Water | Check with your supplier |
| B2 | Birmingham | Severn Trent / South Staffs Water | Check with your supplier |
| B3 | Birmingham | Severn Trent / South Staffs Water | Check with your supplier |
| B4 | Birmingham | Severn Trent / South Staffs Water | Check with your supplier |
| B5 | Birmingham | Severn Trent / South Staffs Water | Check with your supplier |
| B6 | Birmingham | Severn Trent / South Staffs Water | Check with your supplier |
| B7 | Birmingham | Severn Trent / South Staffs Water | Check with your supplier |
| B8 | Birmingham | Severn Trent / South Staffs Water | Check with your supplier |
| B9 | Birmingham | Severn Trent / South Staffs Water | Check with your supplier |
| B10 | Birmingham | Severn Trent / South Staffs Water | Check with your supplier |
| B11 | Birmingham | Severn Trent / South Staffs Water | Check with your supplier |
| B12 | Birmingham | Severn Trent / South Staffs Water | Check with your supplier |
| B13 | Birmingham | Severn Trent / South Staffs Water | Check with your supplier |
| B14 | Birmingham | Severn Trent / South Staffs Water | Check with your supplier |
| B15 | Birmingham | Severn Trent / South Staffs Water | Check with your supplier |
| B16 | Birmingham | Severn Trent / South Staffs Water | Check with your supplier |
| B17 | Smethwick | Severn Trent / South Staffs Water | Check with your supplier |
| B18 | Birmingham | Severn Trent / South Staffs Water | Check with your supplier |
| B19 | Birmingham | Severn Trent / South Staffs Water | Check with your supplier |
| B20 | Birmingham | Severn Trent / South Staffs Water | Check with your supplier |
| B21 | Smethwick | Severn Trent / South Staffs Water | Check with your supplier |
| B23 | Royal Sutton Coldfield | Severn Trent / South Staffs Water | Check with your supplier |
| B24 | Royal Sutton Coldfield | Severn Trent / South Staffs Water | Check with your supplier |
| B25 | Birmingham | Severn Trent / South Staffs Water | Check with your supplier |
| B26 | Solihull | Severn Trent / South Staffs Water | Check with your supplier |
| B27 | Solihull | Severn Trent / South Staffs Water | Check with your supplier |
| B28 | Solihull | Severn Trent / South Staffs Water | Check with your supplier |
| B29 | Birmingham | Severn Trent / South Staffs Water | Check with your supplier |
| B30 | Birmingham | Severn Trent / South Staffs Water | Check with your supplier |
| B31 | Halesowen | Severn Trent / South Staffs Water | Check with your supplier |
| B32 | Blackheath | Severn Trent / South Staffs Water | Check with your supplier |
| B33 | Coleshill | Severn Trent / South Staffs Water | Check with your supplier |
| B34 | Coleshill | Severn Trent / South Staffs Water | Check with your supplier |
| B35 | Royal Sutton Coldfield | Severn Trent / South Staffs Water | Check with your supplier |
| B36 | Coleshill | Severn Trent / South Staffs Water | Check with your supplier |
| B37 | Coleshill | Severn Trent / South Staffs Water | Check with your supplier |
| B38 | Birmingham | Severn Trent / South Staffs Water | Check with your supplier |
| B40 | Coleshill | Severn Trent / South Staffs Water | Check with your supplier |
| B42 | West Bromwich | Severn Trent / South Staffs Water | Check with your supplier |
| B43 | Walsall | Severn Trent / South Staffs Water | Check with your supplier |
| B44 | Royal Sutton Coldfield | Severn Trent / South Staffs Water | Check with your supplier |
| B45 | Bromsgrove | Severn Trent / South Staffs Water | Check with your supplier |
| B46 | Coleshill | Severn Trent / South Staffs Water | Check with your supplier |
| B47 | Solihull | Severn Trent / South Staffs Water | Check with your supplier |
| B48 | Redditch | Severn Trent / South Staffs Water | Check with your supplier |
| B49 | Alcester | Severn Trent / South Staffs Water | Check with your supplier |
| B50 | Alcester | Severn Trent / South Staffs Water | Check with your supplier |
| B60 | Bromsgrove | Severn Trent / South Staffs Water | Check with your supplier |
| B61 | Bromsgrove | Severn Trent / South Staffs Water | Check with your supplier |
| B62 | Halesowen | Severn Trent / South Staffs Water | Check with your supplier |
| B63 | Halesowen | Severn Trent / South Staffs Water | Check with your supplier |
| B64 | Blackheath | Severn Trent / South Staffs Water | Check with your supplier |
| B65 | Rowley Regis | Severn Trent / South Staffs Water | Check with your supplier |
| B66 | Smethwick | Severn Trent / South Staffs Water | Check with your supplier |
| B67 | Smethwick | Severn Trent / South Staffs Water | Check with your supplier |
| B68 | Smethwick | Severn Trent / South Staffs Water | Check with your supplier |
| B69 | Oldbury | Severn Trent / South Staffs Water | Check with your supplier |
| B70 | West Bromwich | Severn Trent / South Staffs Water | Check with your supplier |
| B71 | West Bromwich | Severn Trent / South Staffs Water | Check with your supplier |
| B72 | Royal Sutton Coldfield | Severn Trent / South Staffs Water | Check with your supplier |
| B73 | Royal Sutton Coldfield | Severn Trent / South Staffs Water | Check with your supplier |
| B74 | Royal Sutton Coldfield | Severn Trent / South Staffs Water | Check with your supplier |
| B75 | Royal Sutton Coldfield | Severn Trent / South Staffs Water | Check with your supplier |
| B76 | Royal Sutton Coldfield | Severn Trent / South Staffs Water | Check with your supplier |
| B77 | Fazeley | Severn Trent / South Staffs Water | Check with your supplier |
| B78 | Fazeley | Severn Trent / South Staffs Water | Check with your supplier |
| B79 | Tamworth | Severn Trent / South Staffs Water | Check with your supplier |
| B80 | Redditch | Severn Trent / South Staffs Water | Check with your supplier |
| B90 | Solihull | Severn Trent / South Staffs Water | Check with your supplier |
| B91 | Solihull | Severn Trent / South Staffs Water | Check with your supplier |
| B92 | Solihull | Severn Trent / South Staffs Water | Check with your supplier |
| B93 | Solihull | Severn Trent / South Staffs Water | Check with your supplier |
| B94 | Henley-in-Arden | Severn Trent / South Staffs Water | Check with your supplier |
| B95 | Henley-in-Arden | Severn Trent / South Staffs Water | Check with your supplier |
| B96 | Redditch | Severn Trent / South Staffs Water | Check with your supplier |
| B97 | Redditch | Severn Trent / South Staffs Water | Check with your supplier |
| B98 | Redditch | Severn Trent / South Staffs Water | Check with your supplier |
| B99 | Birmingham | Severn Trent / South Staffs Water | Check with 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 B
No water company covering B 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 |
|---|---|---|---|---|
| B1 | Not published by Severn Trent. Check with your supplier. | |||
| B2 | Not published by Severn Trent. Check with your supplier. | |||
| B3 | Not published by Severn Trent. Check with your supplier. | |||
| B4 | Not published by Severn Trent. Check with your supplier. | |||
| B5 | Not published by Severn Trent. Check with your supplier. | |||
| B6 | Not published by Severn Trent. Check with your supplier. | |||
| B7 | Not published by Severn Trent. Check with your supplier. | |||
| B8 | Not published by Severn Trent. Check with your supplier. | |||
| B9 | Not published by Severn Trent. Check with your supplier. | |||
| B10 | Not published by Severn Trent. Check with your supplier. | |||
| B11 | Not published by Severn Trent. Check with your supplier. | |||
| B12 | Not published by Severn Trent. Check with your supplier. | |||
| B13 | Not published by Severn Trent. Check with your supplier. | |||
| B14 | Not published by Severn Trent. Check with your supplier. | |||
| B15 | Not published by Severn Trent. Check with your supplier. | |||
| B16 | Not published by Severn Trent. Check with your supplier. | |||
| B17 | Not published by Severn Trent. Check with your supplier. | |||
| B18 | Not published by Severn Trent. Check with your supplier. | |||
| B19 | Not published by Severn Trent. Check with your supplier. | |||
| B20 | Not published by Severn Trent. Check with your supplier. | |||
| B21 | Not published by Severn Trent. Check with your supplier. | |||
| B23 | Not published by Severn Trent. Check with your supplier. | |||
| B24 | Not published by Severn Trent. Check with your supplier. | |||
| B25 | Not published by Severn Trent. Check with your supplier. | |||
| B26 | Not published by Severn Trent. Check with your supplier. | |||
| B27 | Not published by Severn Trent. Check with your supplier. | |||
| B28 | Not published by Severn Trent. Check with your supplier. | |||
| B29 | Not published by Severn Trent. Check with your supplier. | |||
| B30 | Not published by Severn Trent. Check with your supplier. | |||
| B31 | Not published by Severn Trent. Check with your supplier. | |||
| B32 | Not published by Severn Trent. Check with your supplier. | |||
| B33 | Not published by Severn Trent. Check with your supplier. | |||
| B34 | Not published by Severn Trent. Check with your supplier. | |||
| B35 | Not published by Severn Trent. Check with your supplier. | |||
| B36 | Not published by Severn Trent. Check with your supplier. | |||
| B37 | Not published by Severn Trent. Check with your supplier. | |||
| B38 | Not published by Severn Trent. Check with your supplier. | |||
| B40 | Not published by Severn Trent. Check with your supplier. | |||
| B42 | Not published by Severn Trent. Check with your supplier. | |||
| B43 | Not published by Severn Trent. Check with your supplier. | |||
| B44 | Not published by Severn Trent. Check with your supplier. | |||
| B45 | Not published by Severn Trent. Check with your supplier. | |||
| B46 | Not published by Severn Trent. Check with your supplier. | |||
| B47 | Not published by Severn Trent. Check with your supplier. | |||
| B48 | Not published by Severn Trent. Check with your supplier. | |||
| B49 | Not published by Severn Trent. Check with your supplier. | |||
| B50 | Not published by Severn Trent. Check with your supplier. | |||
| B60 | Not published by Severn Trent. Check with your supplier. | |||
| B61 | Not published by Severn Trent. Check with your supplier. | |||
| B62 | Not published by Severn Trent. Check with your supplier. | |||
| B63 | Not published by Severn Trent. Check with your supplier. | |||
| B64 | Not published by Severn Trent. Check with your supplier. | |||
| B65 | Not published by Severn Trent. Check with your supplier. | |||
| B66 | Not published by Severn Trent. Check with your supplier. | |||
| B67 | Not published by Severn Trent. Check with your supplier. | |||
| B68 | Not published by Severn Trent. Check with your supplier. | |||
| B69 | Not published by Severn Trent. Check with your supplier. | |||
| B70 | Not published by Severn Trent. Check with your supplier. | |||
| B71 | Not published by Severn Trent. Check with your supplier. | |||
| B72 | Not published by Severn Trent. Check with your supplier. | |||
| B73 | Not published by Severn Trent. Check with your supplier. | |||
| B74 | Not published by Severn Trent. Check with your supplier. | |||
| B75 | Not published by Severn Trent. Check with your supplier. | |||
| B76 | Not published by Severn Trent. Check with your supplier. | |||
| B77 | Not published by Severn Trent. Check with your supplier. | |||
| B78 | Not published by Severn Trent. Check with your supplier. | |||
| B79 | Not published by Severn Trent. Check with your supplier. | |||
| B80 | Not published by Severn Trent. Check with your supplier. | |||
| B90 | Not published by Severn Trent. Check with your supplier. | |||
| B91 | Not published by Severn Trent. Check with your supplier. | |||
| B92 | Not published by Severn Trent. Check with your supplier. | |||
| B93 | Not published by Severn Trent. Check with your supplier. | |||
| B94 | Not published by Severn Trent. Check with your supplier. | |||
| B95 | Not published by Severn Trent. Check with your supplier. | |||
| B96 | Not published by Severn Trent. Check with your supplier. | |||
| B97 | Not published by Severn Trent. Check with your supplier. | |||
| B98 | Not published by Severn Trent. Check with your supplier. | |||
| B99 | Not published by Severn Trent. 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 B 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 B area?
There are 78 B postcode districts, running from B1 to B99, and they contain 41,844 live postcodes across 262 sectors.
What towns does the B postcode area cover?
B covers Birmingham, Royal Sutton Coldfield, Solihull, Coleshill, Smethwick and Halesowen. The area takes its name from Birmingham, and each district is listed with its settlement in the table on this page.
Which water company supplies B postcodes?
Severn Trent supplies all 78 B 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 B1 and B2 both say Birmingham?
B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, B11, B12, B13, B14, B15, B16, B18, B19, B20, B25, B29, B30, B38 and B99 all serve Birmingham, 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 B postcode map?
Yes. This page offers the B 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 B area called Birmingham when it covers Halesowen?
B takes its letters from Birmingham, where the sorting office that served the area was based when the code was allocated. Halesowen is the largest settlement in the area today, in B31, but the area code follows the historic sorting geography rather than current population.
Which councils cover the B postcode area?
B reaches into Birmingham, Worcestershire, Warwickshire, Sandwell, Solihull, Staffordshire, Dudley and Walsall. 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.