$ whois dev.
% IANA WHOIS server
% for more information on IANA, visit http://www.iana.org/
% This query returned 1 object
domain: DEV
organisation: Charleston Road Registry Inc.
address: 1600 Amphitheatre Parkway
address: Mountain View CA 94043
address: United States of America (the)
# the rest of output omitted
Too good to be true.
Light is light (or just THz range of frequency), there are the reasons why it isn't mainstream.
E.g. fog, heavy rain, snow, hot air "artifacts", etc.
You can easily check it by WHOIS:
And some hints gives Wikipedia: List of Internet top-level domains.