| Code | Name | Region |
|---|---|---|
| IEBLY | Belmullet | MO |
| IEBTB | Belturbet | CN |
| IEBYS | Bettystown | MH |
| IEBIH | Birdhill | TA |
| IEBIR | Birr | OY |
| IEBVL | Bishops Village | CO |
| IEBLA | Blackrock | D |
| IEBKW | Blackwater | WX |
| IEBHT | Blanchardstown | |
| IEBNY | Blarney | CO |
| IEBLE | Blessington | WW |
| IEZMY | Borris | CW |
| IEBIO | Borris In Ossory | LS |
| IEBEH | Borrisoleigh | TA |
| IEBOY | Boyle | RN |
| IEBHS | Ballyhaunis | |
| IEBYL | Ballyhoolahan | CO |
| IEBLF | Ballyjamesduff | CN |
| IEBLR | Ballylanders | LK |
| IEBYB | Ballymacarbry | WD |
| IEBLM | Ballymahon | LD |
| IEBMY | Ballymoney | DL |
| IEBMO | Ballymote | SO |
| IEBMT | Ballymount | |
| IEBRY | Ballymurray | RN |
| IEBGY | Ballynacargy | |
| IEBRG | Ballyragget | KK |
| IEBSN | Ballyshannon | |
| IEBYV | Ballyvaughan | CE |
| IEBVY | Ballyvourney | CO |
| IEBTM | Baltimore | |
| IEBLT | Baltinglass | WW |
| IEBGR | Banagher | OY |
| IEBDO | Bandon | |
| IEBNG | Bangor | |
| IEBAN | Ballineen | |
| IEBRO | Ballinrobe | MO |
| IEIBS | Ballinskelligs | KY |
| IEBAV | Ballivor | |
| IEBON | Ballon | CW |
| IEBDG | Ballsbridge | D |
| IEBLB | Ballybay | MN |
| IEJBR | Ballybin | LH |
| IEBBY | Ballybofey | |
| IEBGH | Ballyboghil (ballyboughal) | D |
| IEBAO | Ballyboro | WX |
| IEBCL | Ballycollin | D |
| IEIBL | Ballyconnell | CN |
| IEBLN | Ballycotton | CO |
| IEBVD | Ballydavid | KY |