Teester
According to http://maps.openstreetmap.ie/?zoom=16&lat=53.58103&lon=-6.10795&layers=B00TFFFFFFFFFFFF, this area is a subtownland located in the townland of Townparks.  I've added the subtownland in changeset #54886623.  

I suppose the addresses in the area should technically be Red Island, Townparks, Skerries, Co. Dublin (Subtownland, Townland, Electoral Division, County) but I think the townland is often left out in these cases.