KA
30 districts, 11,786 postcodes
North Ayrshire, East Ayrshire, South Ayrshire
| District | Postcodes | Local authority |
|---|---|---|
| KA1 | 1,024 | East Ayrshire |
| KA10 | 433 | South Ayrshire |
| KA11 | 541 | North Ayrshire |
| KA12 | 588 | North Ayrshire |
| KA13 | 462 | North Ayrshire |
| KA14 | 37 | North Ayrshire |
| KA15 | 245 | North Ayrshire |
| KA16 | 111 | East Ayrshire |
| KA17 | 140 | East Ayrshire |
| KA18 | 738 | East Ayrshire |
| KA19 | 316 | South Ayrshire |
| KA2 | 227 | East Ayrshire |
| KA20 | 265 | North Ayrshire |
| KA21 | 373 | North Ayrshire |
| KA22 | 319 | North Ayrshire |
| KA23 | 190 | North Ayrshire |
| KA24 | 226 | North Ayrshire |
| KA25 | 225 | North Ayrshire |
| KA26 | 404 | South Ayrshire |
| KA27 | 205 | North Ayrshire |
| KA28 | 72 | North Ayrshire |
| KA29 | 66 | North Ayrshire |
| KA3 | 1,192 | East Ayrshire |
| KA30 | 361 | North Ayrshire |
| KA4 | 171 | East Ayrshire |
| KA5 | 422 | East Ayrshire |
| KA6 | 529 | East Ayrshire |
| KA7 | 918 | South Ayrshire |
| KA8 | 537 | South Ayrshire |
| KA9 | 449 | South Ayrshire |