Website link Organisation Cost Area covered Notes
streetdirectories.proni.gov.uk Public Record Office for Northern Ireland (PRONI) Free Towns and cities in Ulster Only 19th Century
1915crewlists.rmg.co.uk National Maritime Museum (UK) Free   Crew lists of the British Merchant Navy from 1915 – search by ship available
lennonwylie.co.uk Private Free Cities in Ulster, Mostly Belfast, some Lisburn, Newry. Trade and resident directories.