Does the country publish full voter registers at the national level online?

http://www.electionsireland.org/

Each local authority is responsible for creating a voter register. The voter register contains the voter's name, address, polling station and category of voter and is available in physical form. The voter registers are available in post offices, Garda stations, public libraries and local authority offices.
For inclusion in the Register of Electors you must complete application form RFA which is available from your local authority, to whom it must be returned.
http://www.citizensinformation.ie/en/government_in_ireland/elections_and_referenda/voting/registering_to_vote.html