| Area/District | Active Postcodes |
| OX1 | 1,707 |
| OX10 | 1,447 |
| OX11 | 1,494 |
| OX12 | 1,248 |
| OX13 | 594 |
| OX14 | 1,964 |
| OX15 | 1,014 |
| OX16 | 2,611 |
| OX17 | 865 |
| OX18 | 1,127 |
| OX2 | 1,650 |
| OX20 | 347 |
| OX25 | 560 |
| OX26 | 1,274 |
| OX27 | 408 |
| OX28 | 1,147 |
| OX29 | 1,200 |
| OX3 | 1,386 |
| OX33 | 375 |
| OX39 | 315 |
| OX4 | 2,491 |
| OX44 | 436 |
| OX49 | 297 |
| OX5 | 1,283 |
| OX6 | 1,654 |
| OX7 | 1,819 |
| OX8 | 2,342 |
| OX9 | 2,296 |