| PO Number | Town / Place name | Code |
|---|---|---|
| 500 | Kilchrennan Kilchrenan | |
| 501 | Kintore | |
| 502 | Renton | |
| 503 | Crainlarich | |
| 504 | Dalmeny | |
| 505 | Beattock | |
| 506 | Lochinver | |
| 507 | Isle of Whithorn | |
| 508 | Lilliesleaf | |
| 509 | Auchmill Bucksburn | |
| 510 | Palnure | |
| 511 | Oyne | |
| 512 | Balblair | |
| 513 | Kinlockbervie | |
| 514 | Cardross | |
| 515 | Castlebay | |
| 516 | Lochboisdale Pier | |
| 517 | Philipstown Philipstoun | |
| 518 | Inverie Knoydart | |
| 519 | Kinlochewe | |
| 520 | Friockheim | |
| 521 | Collieston | |
| 522 | Cove Aberdeen | |
| 523 | Lumphanan | |
| 524 | Broughton | |
| 525 | Old Deer | |
| 526 | Thankerston | |
| 527 | Galston | |
| 528 | Glenboig | |
| 529 | Tynehead | |
| 530 | Bishopton | |
| 531 | East Calder | |
| 532 | Lhanbryde | |
| 533 | Addiewell | |
| 534 | Ardeonaig | |
| 535 | Ardtelnaig | |
| 536 | Fernan | |
| 537 | Lawes | |
| 538 | Gullane | |
| 539 | Cardenan | |
| 540 | Archiestown | |
| 541 | Craignure | |
| 542 | Connel | |
| 543 | Lochbuie | |
| 544 | King Edward | |
| 545 | Onich | |
| 546 | Staffin | |
| 547 | Airth Rd. Station | |
| 548 | Skelmorlie | |
| 549 | Newmains | |
| 550 | Stenhousemuir | |
| 551 | Kilbirnie | |
| 552 | Lochearnhead Station Balquhidder | |
| 553 | Crookham | |
| 554 | New Mills, Fife | |
| 555 | Sauchie | |
| 556 | Bellshill | |
| 557 | Shiskine | |
| 558 | Law | |
| 559 | Caldercruix | |
| 560 | North Queensferry | |
| 561 | Auchterless Station | |
| 562 | Strone | |
| 563 | Kames | |
| 564 | Lonmay | |
| 565 | Eskbank, Dalkeith | |
| 566 | Avonbridge | |
| 567 | Skeabost Bridge | |
| 568 | Denino | |
| 569 | Tyndrum | |
| 570 | Cove, Helensburgh | |
| 571 | Kilcreggan | |
| 572 | Straun | |
| 573 | Hollandbush | |
| 574 | Collessie | |
| 575 | Aberfoyle | |
| 576 | Uphall Station | |
| 577 | Gateside | |
| 578 | Gartmore Station | |
| 579 | Claddich | |
| 580 | Lochwinnoch | |
| 581 | Archaracle | |
| 582 | Slamannan | |
| 583 | Methven | |
| 584 | Oxton | |
| 585 | Glendarual | |
| 586 | Urray | |
| 587 | Strathconan | |
| 588 | Abernethy | |
| 589 | Aberdour | |
| 590 | Thornton | |
| 591 | Tarbolton Station | |
| 592 | Row | |
| 593 | Garelochhead | |
| 594 | Glenfarg | |
| 595 | Shandon | |
| 596 | Hollybush | |
| 597 | Stravithie | |
| 598 | Reccarton, Kilmarnock | |
| 599 | Carsaig |