| A | Australia |
| AN | New South Wales |
| AV | Victoria |
| AQ | Queensland |
| AS | South Australia |
| AW | Western Australia |
| AT | Tasmania |
| ANt | Northern Territory |
| AA | Australian Capital Territory |
|
|
| J | Papua New Guinea / Pacific |
|
|
| K | New Zealand |
|
|
| L | International |
| LJ | Jewish genealogy |
|
|
| M | Great Britain |
| N | England |
| NAv | Avon |
| NBe | Bedfordshire |
| NBer | Berkshire |
| NBu | Buckinghamshire |
| NCa | Cambridgeshire (incl. Huntingdonshire) |
| NCi | Channel Islands |
| NCh | Cheshire |
| NCl | Cleveland |
| NCo | Cornwall |
| NCu | Cumbria (incl. Cumberland, Westmorland) |
| NDe | Derbyshire |
| NDev | Devonshire |
| NDo | Dorsetshire |
| NDu | Durham |
| NEs | Essex |
| NGl | Gloucestershire |
| NHa | Hampshire |
| NHe | Hereford and Worcester |
| NHer | Hertfordshire |
| NHu | Humberside |
| NIm | Isle of Man |
| NIw | Isle of Wight |
| NKe | Kent |
| NLa | Lancashire |
| NLe | Leicestershire |
| NLi | Lincolnshire |
| NLo | London, incl. Middlesex |
| NMa | Manchester, Greater |
| NMe | Merseyside |
| NNo | Norfolk |
| NNoh | Northamptonshire, incl. Rutland |
| NNor | Northumberland |
| NNot | Nottinghamshire |
| NOx | Oxfordshire |
| NSh | Shropshire |
| NSo | Somersetshire |
| NSt | Staffordshire |
| NSu | Suffolk |
| NSur | Surrey |
| NSus | Sussex, incl. East & West |
| NTy | Tyne and Wear |
| NWa | Warwickshire |
| NWe | West Midlands |
| NWi | Wiltshire |
| NYo | Yorkshire (all areas and Ridings) |
|
|
| P | Scotland |
| PBo | Borders, incl. Berwickshire, Peeblesshire, Roxburghshire, Selkirkshire |
| PCe | Central, incl. Clackmannanshire, Dumbartonshire,, Stirlingshire |
PDu | Dumfries and Galloway, incl. Dumfriesshire, Wigtownshire, Kirkcudbrightshire |
| PFi | Fife |
| PGr | Grampian, incl. Aberdeenshire, Banffshire, Kincardineshire, Morayshire |
| PHi | Highlands, incl. Caithness-shire, Inner Hebrides, Invernesshire, Nairnshire, Ross and Cromarty, Skye, Sutherland |
| PLo | Lothian, incl. East Lothian,/Haddington, Mid Lothian, West Lothian/Linlithgow |
| POr | Orkney Isles |
| PSh | Shetland Isles |
| PSt | Strathclyde, incl. Argyllshire, Ayrshire, Buteshire, Lanarkshire, Renfrewshire |
| PTa | Tayside, incl. Angus (Forfarshire), Kinrosshire, Perthshire |
| PWe | Western Isles, incl. Outer Hebrides |
|
|
| Q | Wales |
| QCl | clwyd, incl. Denbigshire, Flintshire |
| QDy | Dyfed, incl. Cardiganshire, Carmarthenshire, Pembrokeshire |
| QGl | Glamorgan, incl. Mid, South & East Glamorgan (formerly Glamorganshire) |
| QGw | Gwent, incl. Monmouthshire |
| QGwy | Gwynedd, incl. Anglesey, Caernarvonshire, Merionethshire |
| QPo | Powys, incl. Breconshire, Montgomery, Radnorshire |
|
|
| R | Ireland |
| RCo | Connaught, incl. Galway, Leitrim, Mayo, Roscommon, Sligo |
| RLe | Leinster, incl. Carlow, Dublin, Kildare, Kilkenny, Leix (Queens), Longford, Louth, Meath, Offaly (Kings), Westmeath, Wexford, Wicklow |
| RMu | Munster, incl. Clare, Cork, Kerry, Limerick, Tipperary, Waterford |
| RUl | Ulster, incl. Antrim, Armagh, Cavan, Donegal, Down, Fermanagh, Londonderry, Monaghan, Tyrone |
|
|
| S | Europe
|
| SAl | Albania |
| SAu | Austria |
| SBe | Belgium |
| SCz | Czechoslovakia |
| SDe | Denmark |
| SFi | Finland |
| SFr | France |
| SGe | Germany, incl. East, West & pre-1945 |
| SGr | Greece |
| SHu | Hungary |
| SIt | Italy |
| SLu | Luxemburg |
| SNe | Netherlands |
| SNo | Norway |
| SPo | Poland |
| SPor | Portugal |
| SRu | Rumania |
| SSp | Spain |
| SSo | Soviet Union |
| SSw | Sweden |
| SSwi | Switzerland |
| SYu | Yugoslavia |
| SZ | Other, e.g. Monaco, San Marino |
|
|
| T | Canada |
| TAl | Alberta |
| TBr | British Colombia |
| TMa | Manitoba |
| TNe | New Brunswick |
| TNew | Newfoundland |
| TNo | Northwest Territories |
| TNov | Nova Scotia |
| TOn | Ontario |
| TPr | Prince Edward Island |
| TQu | Quebec |
| TSa | Saskatchewan |
| TYu | Yukon |
|
|
| U | United States of America |
| UAl | Alabama |
| UAla | Alaska |
| UAr | Arizona |
| UArk | Arkansas |
| UCa | California |
| UCan | Carolina, North |
| UCas | Carolina, South |
| UCo | Colorado |
| UCon | Connecticut |
| UDan | Dakota, North |
| UDas | Dakota, South |
| UDe | Delaware |
| UFl | Florida |
| UGe | Georgia |
| UHa | Hawaii |
| UId | Idaho |
| UIl | Illinois |
| UIn | Indiana |
| UIo | Iowa |
| UKa | Kansas |
| UKe | Kentucky |
| ULo | Louisiana |
| UMa | Maine |
| UMar | Maryland |
| UMas | Massachusetts |
| UMi | Michigan |
| UMin | Minnesota |
| UMs | Mississippipi |
| UMir | Missouri |
| UMo | Montana |
| UNe | Nebraska |
| UNev | Nevada |
| UNeh | New Hampshire |
| UNej | New Jersey |
| UNem | New Mexico |
| UNey | New York |
| UOh | Ohio |
| UOk | Oklahoma |
| UOr | Oregon |
| UPe | Pennsylvania |
| URh | Rhode Island |
| UTe | Tennessee |
| UTex | Texas |
| UUt | Utah |
| UVe | Vermont |
| UVi | Virginia |
| UViw | Virginia, West |
| UWa | Wasjington |
| UWi | Wisconsin |
| UWy | Wyoming |
|
|
| V | Asia (including Middle East) |
|
|
| W | Africa |
|
|
| X | South America, Central America, Caribbean |
|
|
| Y | Special collections |
