Looks like Jim Snape (our Jim) owns it: see the dig:
Query for FTPROOT.NET type=255 class=1
FTPROOT.NET MX (Mail Exchanger) Priority: 0 FTPROOT.NET
FTPROOT.NET SOA (Zone of Authority)
Primary NS: ns1.FTPROOT.NET
Responsible person:
jsnapehsd@earthlink.NET
serial:1048577415
refresh:28800s (8 hours)
retry:7200s (2 hours)
expire:3600000s (410 days)
minimum-ttl:86400s (24 hours)
FTPROOT.NET NS (Nameserver) ns1.FTPROOT.NET
FTPROOT.NET NS (Nameserver) ns2.FTPROOT.NET
FTPROOT.NET A (Address) 216.180.243.202
FTPROOT.NET A (Address) 216.180.243.202
ns1.FTPROOT.NET A (Address) 216.180.249.173
ns2.FTPROOT.NET A (Address) 216.180.249.174
The dotted-quad address of:
FTPROOT.NET A (Address) 216.180.243.202
gives a whois of: (among others)
NS1.*******4.NET
Looks like you may be on root4 server.
What would I do? I'd wait for s support response before changing any dns. Just my 2 bytes worth.