Just learned that there's a place named Llanfair­pwllgwyngyll­gogery­chwyrn­drobwll­llan­tysilio­gogo­goch, which has a website at https://www.llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch.co.uk/

Which makes me wonder, is there a limit on the length of a DNS name? Are there DNS implementations that will malfunction on a name that long?