SCOTLAND
Clyde islands
| CL-01 | Arran |
| CL-02 | Bute |
| CL-03 | Great Cumbrae |
| CL-04 | Little Cumbrae |
| CL-05 | Ailsa Craig |
| CL-06 | Holy |
| CL-07 | Pladda |
| CL-08 | Sanda |
| CL-09 | Davaar |
| CL-10 | Inchmarnock |
| CL-11 | Lady Isle |
| CL-12 | Horse |
| CL-13 | Burnt (Burse) |
Firth of Forth islands
| FF-01 | Isle of May |
| FF-02 | Bass Rock |
| FF-03 | Craigleith |
| FF-04 | Fidra |
| FF-05 | Inchkeith |
| FF-06 | Inchcolm |
| FF-07 | Inchmickery |
| FF-08 | Lamb |
Firth of Lornes islands
| FL-01 | Lismore |
| FL-02 | Kerrera |
| FL-03 | Seil |
| FL-04 | Luing |
| FL-05 | Scarba |
| FL-06 | Garvellachs |
| FL-07 | Lunga |
| FL-08 | Shuna (E of Luing) |
| FL-09 | Eilean Macaskin |
| FL-10 | Eilean Righ |
| FL-11 | Eilan Mhic-Crion |
| FL-12 | Shuna (NW of Appin) |
Inner Hebrides islands
| NH-01 | Canna |
| NH-02 | Rhum |
| NH-03 | Eigg |
| NH-04 | Tiree |
| NH-05 | Coll |
| NH-06 | Muck |
| NH-07 | Skye |
| NH-08 | Ascribe Islands |
| NH-09 | Rona |
| NH-10 | Raasay |
| NH-11 | Pabay |
| NH-12 | Crowlin Islands |
| NH-13 | Longay |
| NH-14 | Wiay |
| NH-15 | Mull |
| NH-16 | Iona |
| NH-17 | Treshnish Islands |
| NH-18 | Ulva |
| NH-19 | Colonsay |
| NH-20 | Oronsay |
| NH-21 | Jura |
| NH-22 | Islay |
| NH-23 | Texa |
| NH-24 | Gigha |
| NH-25 | Cara |
| NH-26 | Soay |
| NH-27 | Little Colonsay |
| NH-28 | Gometra |
| NH-29 | Staffa |
| NH-30 | Scalpay (Skye) |
| NH-31 | Isay |
| NH-32 | Eorsa (Mull) |
| NH-33 | Mingay (Skye) |
| NH-34 | Isay |
| NH-35 | Eorsa (Mull) |
| NH-36 | Calve (Mull) |
| NH-37 | Inch Kenneth |
Outer Hebrides islands
| OH-01 | Lewis & Harris |
| OH-02 | North Uist |
| OH-03 | South Uist |
| OH-04 | Benbecula |
| OH-05 | Berneray |
| OH-06 | Monach Islands |
| OH-07 | Vatersay |
| OH-08 | Mingulay |
| OH-09 | Eriskay |
| OH-10 | Sandray |
| OH-11 | Barra |
| OH-12 | Great Bernera |
| OH-13 | Scarp |
| OH-14 | Tarnansay |
| OH-15 | Pabbay |
| OH-16 | South Berneray |
| OH-17 | South Pabbay |
| OH-18 | Shiant Islands |
| OH-19 | Boreray |
| OH-20 | Killegray |
| OH-21 | Ensay |
| OH-22 | Eilean Iubhard |
| OH-23 | Seaforth |
| OH-24 | Mealista |
| OH-25 | Scalpay (Harris) |
| OH-26 | Baleshare |
| OH-27 | Grimsay |
| OH-28 | Vallay (NW of N Uist) |
| OH-29 | Kirkibost |
| OH-30 | Ronay |
| OH-31 | Wiay (NE of N Uist) |
Outliers islands
| OL-01 | Flannan |
| OL-02 | St.Kilda |
| OL-03 | North Rona |
| OL-04 | Sula Sgeir |
| OL-05 | Rockall |
Orkney islands
| OR-01 | Mainland |
| OR-02 | Westray |
| OR-03 | Papa Westray |
| OR-04 | North Ronaldsay |
| OR-05 | South Ronaldsay |
| OR-06 | Hoy |
| OR-07 | Shapinsay |
| OR-08 | Stronsay |
| OR-09 | Rousay |
| OR-10 | Sanday |
| OR-11 | Eday |
| OR-12 | Egilsay |
| OR-13 | Flotta |
| OR-14 | Burray |
| OR-15 | Swona |
| OR-16 | Switha |
| OR-17 | Fara |
| OR-18 | Cava |
| OR-19 | Copinsay |
| OR-20 | Graemsay |
| OR-21 | Gairsay |
| OR-22 | Wyre |
| OR-23 | Faray |
| OR-24 | Eynhallow |
| OR-25 | Auskerry |
| OR-26 | Lamb Holm |
| OR-27 | Glim Holm |
| OR-28 | Hunda |
Coastrals islands
| SC-01 | Pentland Skerries |
| SC-02 | Stroma |
| SC-03 | Neave |
| SC-04 | Eilean Nan Ron |
| SC-05 | Rabbit Islands |
| SC-06 | Eilean Hoan |
| SC-07 | Handa |
| SC-08 | Oldany |
| SC-09 | Gruinard |
| SC-10 | Summer Isle |
| SC-11 | Isle of Ewe |
| SC-12 | Eilean Horrisdale |
| SC-13 | Longa |
| SC-14 | Trodday |
| SC-15 | Fladda |
| SC-16 | Mingay |
| SC-17 | Isay |
Solway of Firth islands
| SF-01 | Hestan |
| SF-02 | Little Ross |
| SF-03 | Islands of Fleet |
| SF-04 | Scares |
Shetlands islands
| SH-01 | Mainland |
| SH-02 | Unst |
| SH-03 | Yell |
| SH-04 | Fetlar |
| SH-05 | Whalsay |
| SH-06 | Bressay |
| SH-07 | Foula |
| SH-08 | Outer Skerries |
| SH-09 | Fair Isle |
| SH-10 | Mousa |
| SH-11 | Noss |
| SH-12 | Vaila |
| SH-13 | Vementry |
| SH-14 | Papa Stour |
| SH-15 | Hascosay |
| SH-16 | Hildasay |
| SH-17 | Papa Little |