The official description of the R263 from the Roads Act 1993 (Classification of Regional Roads) Order 2012[1] reads:
R263: Aghayeevoge — Killybegs — Málainn Bhig, County Donegal
Between its junction with N56 at Aghayeevoge and its terminal point at Trabane via Corporation; Main Street and New Row in the town of Killybegs; Fintragh Bridge, Bavan, Droim na Fionagaile, Caiseal Charna, Cill Chathasaigh, An Charrig, Mín na bhFachran, An Caiseal, Cill Fhathnaid, Dún Ailt, Málainn Mhóir, Droichead Chroimghlinne and Málainn Bhig all in the county of Donegal.
