npub1grx4wzqldf8clxusxpz78adjcukkqvdkhf8amsdhr6sy3ctuu2fqvsuxfe (npub1grx…uxfe) npub1kdr29asephkcv3mh6mmpp0va3njl3h57l0dw58s5slna0zepgjms03quey (npub1kdr…quey)
Instances with mastodon urls are mastodon, but I agree - it's not just mastodon, there's a whole fediverse - heads.social(good music lovers galore there), sfba.social (SF Bay Area), etc...