Resources >> Tools >> Domain Name Registration >> Availability Check
Namecheap Bulk Search - Availability checker allowing up to 5000 domains to be tested across gTLDs and major ccTLDs.
Bulk-search EuroDNS - Mass availability checker for a large number of gTLD and ccTLD extensions, offered by EuroDNS
Namechk - Brand availability checker across domain name extensions and social networks
Knowem - Brand availability checker on social networks
BulkSearch Namebright - Availability check on gTLDs, offered by Namebright (now limited)