Irish Birth certificates

[Blackrose87]

There was a large fire at the Irish GRO in 1922 where many records were destroyed, so, yes, results can be patchy.

Would the GRO have had records from all 32 countries at this time? Or would the 6 northern countries record have been in Belfast?
My father's family are all from Ballymena in Antrim, so maybe some records still exist?

My father has tried with his Presbyterian church but they only seem to have records back til 1860 or thereabouts.