The domain name JV.net shows available when you do a whois look up, but when you go to register it the domain is not available. The domain dropped in 2013. The domain looks to have been owned by JVM out of Korea. These 1 and 2 charater .net names got reserved in 2005 and in 2010 Verisign wanted to auction them off, they later decided against that plan.
Usually when a domain is reserved the whois shows that IANA has reserved the domain like with the following R.net:
|Registrant Org||Internet Assigned Numbers Authority is associated with ~141 other domains|
|Registrar||RESERVED-INTERNET ASSIGNED NUMBERS AUTHORITY|
|Registrar Status||serverDeleteProhibited, serverTransferProhibited, serverUpdateProhibited|
|Dates||Created on 1993-12-01 – Expires on 2015-12-08 – Updated on 2014-12-09|
|Domain Status||Registered And No Website|
|Whois History||172 records have been archived since 2003-08-11|
|Registrar History||1 registrar|
|Hosting History||5 changes on 2 unique name servers over 9 years|
It looks like JV.net must just be a glitch in the mechanism of showing reserved status in the whois records.