Had to check, but that is actually beyond what DNS allows. Labels (the part between dots) are limited to 63 characters. We could sneakily drop an s somewhere in there and then it would fit.

https://datatracker.ietf.org/doc/html/rfc1035

Also I think I triggered a nice error log in domaintools just now. https://whois.domaintools.com/downdetectorsdowndetectorsdown...