Information from VM Ireland activation codes support page and VM Digital box setup screen:
Locality / Network ID / Home Frequency
Swords/Malahide : 43216 : 290000
Cork City : 43216 : 290000
Dublin City/Leixlip/Maynooth/Celbridge/Balbriggan : 43217 : 291000
Newcastle/Ashbourne/Rush : 43230 ...