| Area/District | Active Postcodes |
| B1 | 717 |
| B10 | 457 |
| B11 | 1,029 |
| B12 | 749 |
| B13 | 1,111 |
| B14 | 1,034 |
| B15 | 841 |
| B16 | 1,156 |
| B17 | 797 |
| B18 | 914 |
| B19 | 682 |
| B2 | 860 |
| B20 | 751 |
| B21 | 779 |
| B22 | 10 |
| B23 | 1,241 |
| B24 | 762 |
| B25 | 515 |
| B26 | 746 |
| B27 | 543 |
| B28 | 838 |
| B29 | 1,106 |
| B3 | 706 |
| B30 | 888 |
| B31 | 1,461 |
| B32 | 1,107 |
| B33 | 926 |
| B34 | 384 |
| B35 | 442 |
| B36 | 717 |
| B37 | 925 |
| B38 | 592 |
| B4 | 467 |
| B40 | 26 |
| B42 | 757 |
| B43 | 669 |
| B44 | 795 |
| B45 | 918 |
| B46 | 666 |
| B47 | 294 |
| B48 | 244 |
| B49 | 515 |
| B5 | 891 |
| B50 | 226 |
| B6 | 872 |
| B60 | 1,178 |
| B61 | 856 |
| B62 | 927 |
| B63 | 1,019 |
| B64 | 632 |
| B65 | 641 |
| B66 | 950 |
| B67 | 762 |
| B68 | 690 |
| B69 | 1,086 |
| B7 | 437 |
| B70 | 1,373 |
| B71 | 791 |
| B72 | 374 |
| B73 | 1,023 |
| B74 | 972 |
| B75 | 836 |
| B76 | 1,072 |
| B77 | 1,434 |
| B78 | 725 |
| B79 | 857 |
| B8 | 778 |
| B80 | 254 |
| B9 | 779 |
| B90 | 1,508 |
| B91 | 1,410 |
| B92 | 906 |
| B93 | 861 |
| B94 | 422 |
| B95 | 412 |
| B96 | 237 |
| B97 | 1,284 |
| B98 | 1,128 |
| B99 | 59 |