Signal cabin prefix codes

A (hopefully) comprehensive listing

Irish signal cabins

Last update 26 May 2021

Additional information is always gratefully received, whether entirely new records (particularly historical records) or information to fill in gaps or correct errors, via the contact link under the Miscellaneous entry in the navigation bar above. Thank you.

Please select a starting letter from the links below:

This listing includes both Northern Ireland Railways/Translink and Iarnród Éireann/Córas Iompair Éireann signals. Instances where a prefix is known but its controlling signal cabin is not are shown at the end of the table.

Code Signal Cabin Note
AD Adelaide
AN Antrim
AE Athlone
AE R Distant signals
XG Level crossing signals
XM Level crossing signals
AY Athy
BA Ballina
BY Ballybrophy
NBX Ballycoskerry Crossing Automatic signals 'numbered' NBX DS and NBX US
BA Ballymena
BY Ballymoney
BR Bangor
CL Belfast Central
CLR Banner repeater signals
CLRR Banner repeater signals
BN Bellarena
BH Birdhill
BWX Bishopswood Crossing Automatic signal 'numbered' BWX UD
BG Bleach Green
BN Booterstown
BR Bray
C Castlebar
R Distant signals
CS Carrickfergus
CR Carrick-on-Suir
CK Castlerock
RC Charleville Prefix derived from Irish Gaelic name 'Rathluirc'
RC R Distant signals
CY Cherryville Junction
CY R Distant signals
CR Church Road Downgraded to shunt frame 7 July 1991
CA Clara
CA R Distant signals
XA Ashfield Crossing
CL Clonmel Semaphore signals, prefix not carried
CL Clonsilla Also manages Dublin West (DW) and Maynooth (MN) signals
CN Clonydonnin
CN R Distant signals
CE Coleraine
CY Connolly New panel installed 22 May 1983
BN Booterstown signals
BR Bray signals
CY-GH Geashill signals
CY-PE Portlaoise signals
DK Dalkey signals
DL Dún Laoghaire signals
HJ Howth Junction signals
HT Howth signals
KR Killester signals
ND North Dublin (Malahide) signals
C Connolly Central
EW Connolly East Wall
S Connolly Station
CW Connolly West
WR Connolly West Road
WR R Distant signals
CK Cork
CK R Distant signals
CE Cork East uncertain, near Midleton
DK Dalkey
DA Drogheda
DN Dromkeen
DN R Distant signals
DC Dublin Central
DS Dublin Docklands
DN Dublin North
DL Dun Laoghaire
DD Dundalk
FL Fingal
XF Foynes Level crossing signals
GL Galway
GL R Distant signals
XG Level crossing signals
GS Greystones
HN Heuston Named Dublin Kingsbridge to 9 April 1966
HN BR Banner repeater signals
HN R Distant signals
HK Heuston-Kildare main line
HJ Howth Junction Named Junction to 30 June 1912
KY Kilkenny
KN Killagan?
KR Killester
KJ Killonan Junction
KJ R Distant signals
KG Knockcroghery
LJ Lagan Junction
LR Larne Harbour
LN Larne Town
PL Laois Train Care Depot
LY Liffey Junction
LJ Limerick Junction
LJ R Distant signals
LJ S Limerick Junction (South)
LK Limerick Station
LK R Distant signals
LKCK Limerick Yard
LF Lisduff
LF R Distant signals
LNX Lisnolan level crossing Automatic signal 'numbered' LNX DS
LY Londonderry
MH Malahide
ND Malahide (North Dublin)
MW Mallow Unclear whether this was previously North or South signal cabin
MW R Distant signals
MJ Manulla Junction
R Distant signals
ML Code in use 2015
MN Maynooth
ML Mayo Line (Athlone to Westport and Ballina)
ML R Distant signals
XM Level crossing signals
XX Level crossing signals
R Moathill Crossing Distant signals
MR Moira
MB Muine Bheag
NN Navan
PD Portadown
PN Portarlington
PN R Distant signals
PH Portrush
RP Rathpeacon
RP R Distant signals
- Roscrea Semaphore signals, no prefix
RL Rosslare Line (Greystones to Rosslare)
RS Rosslare Strand
RS R Distant signals
SL Sligo Line (Maynooth to Sligo)
TK Templepatrick?
TN Thomastown
TNX Thomastown Level Crossing Automatic signals 'numbered' TNX DD and TNX UD
TS Thurles ECP
TS R Distant signals
TY Tipperary
TL Tralee Line (Mallow/Killonan Junction to Tralee)
TL Tullamore
TL R Distant signals
TE R Distant signals
XA Level crossing signals
WD Waterford Central
WL Waterford Line (Cherryville Junction to Waterford West)
WL R Distant signals
XW Level crossing signals
WT Waterford West
WT R Distant signals
WD Whitehead
YR York Road
CLX Unknown level crossing near Ballybrophy Automatic signal 'numbered' CLX DD
FL Unknown near Howth Junction/Malahide
FP Unknown near Glasnevin Junction/Heuston
FP Unknown near Waterford


  1. CIÉ operational documents sometimes show distant signals with only the prefix R. It is understood that this may be a convenient shorthand; the current standard is for the signal plate to carry the full code (e.g. Athlone signals carry AE R). However, for signal cabins closed before current standards came into force, this may not be the case.
  2. CIÉ shunt signals carry the suffix (S) if they are attached to a main signal (e.g. Galway signal GL378 carries shunt signal GL378(S)).