[ILUG] Irish IP GeoLocation?

[Paul Reilly]

Does anyone know where to get a list of the IP address ranges used
by the major broadband providers in Ireland?  I'd like to be able to
restrict access via SSH to just IP's coming from say Eircom,
DigiWeb, Perlico etc. I tried looking up the netblock ranges but
always seem to miss a subnet or two. Are the ranges documented
somewhere?

Also is it possible to identify the town/city people are coming
from based on their IP? I'd like to be able to provide a localised
web page to say people from Galway or Cork, that is different to
the page for people from Dublin.

Paul