You can write to the PRSI cllection office in Sligo. Note the following from Welfare.ie
"You can check your social insurance record with the PRSI Central Records section in the Department of Social and Family Affairs. In order to check your social insurance record, you will need your PPS (Personal Public Service) Number.
"Questions about your eligibility for a State Pension (Contributory) should be addressed to your local social welfare office or:
Department of Social and Family Affairs
Line 1:
Social Welfare Services
Line 2:
College Road
County:
Sligo
Country:
IRELAND
Tel:
(071) 915 7100
Locall:
1890 500 000
Questions about your social insurance record should be addressed to:
PRSI Records
Dept.:
Department of Social and Family Affairs
Line 1:
Inner Relief Road
Line 2:
Ardarvan
Line 3:
Buncrana
County:
Donegal
Country:
IRELAND
Tel:
(01) 471 5898
Locall:
1890 690 690"
Kieran Coughlan, Tax Manager, CXC