Robtex

Up: 199.7.56.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 199.7.58.0/24
Down right: 199.7.59.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
199.7.58.7	PTR	common-7.com-fo.lon3.verisign.com
199.7.58.21	PTR	l1-v29-21.com-fo.lon3.verisign.com
199.7.58.25	PTR	common1.lon3.verisign.com
199.7.58.26	PTR	common2.lon3.verisign.com
199.7.58.28	PTR	rootatmon2.lon3.verisign.com
199.7.58.34	PTR	r1-v21-34.edge-fo.lon3.verisign.com
199.7.58.37	PTR	v101.lb1.anycast-fo.lon3.verisign.com
199.7.58.40	PTR	recnsmon2.lon3.verisign.com
199.7.58.48	PTR	host-48.edge-fo.lon3.verisign.com
199.7.58.59	PTR	host-59.lon3.verisign.com
199.7.58.61	PTR	awhois.lon3.verisign.com
199.7.58.65	PTR	host-65.lon3.verisign.com
199.7.58.72	PTR	ocsp.lon3.verisign.com
199.7.58.73	PTR	host-73.anycast-fo.lon3.verisign.com
199.7.58.74	PTR	whois.lon3.verisign.com
199.7.58.74	A	net.whois-servers.net
199.7.58.84	PTR	host-84.lon3.verisign.com
199.7.58.84	A	whois.nic.name
199.7.58.86	PTR	host-86.lon3.verisign.com
199.7.58.96	PTR	host-96.lon3.verisign.com
199.7.58.107	PTR	host-107.edge-fo.lon3.verisign.com
199.7.58.119	PTR	host-119.lon3.verisign.com
199.7.58.149	PTR	host-149.lon3.verisign.com
199.7.58.151	PTR	host-151.lon3.verisign.com
199.7.58.162	PTR	10gigabitethernet1-2.r2.ves-fo.lon3.verisign.com
199.7.58.163	PTR	host-163.lon3.verisign.com
199.7.58.166	PTR	host-166.edge-fo.lon3.verisign.com
199.7.58.169	PTR	host-169.edge-fo.lon3.verisign.com
199.7.58.176	PTR	host-176.lon3.verisign.com
199.7.58.185	PTR	vl105.r2.sym-fo.lon3.verisign.com
199.7.58.188	PTR	host-188.lon3.verisign.com
199.7.58.189	PTR	host-189.lon3.verisign.com
199.7.58.194	PTR	host-194.lon3.verisign.com
199.7.58.206	PTR	vl1.gslb.edge-fo.lon3.verisign.com
199.7.58.206	A	whoisns5.nstld.net
199.7.58.206	A	ns104.nstld.net
199.7.58.209	PTR	v110.rx.ves-fo.lon3.verisign.com
199.7.58.216	PTR	host-216.lon3.verisign.com
199.7.58.219	PTR	host-219.edge-fo.lon3.verisign.com
199.7.58.240	PTR	grid9.edge-fo.lon3.verisign.com
199.7.58.242	PTR	host-242.lon3.verisign.com
199.7.58.244	PTR	host-244.lon3.verisign.com
199.7.58.245	PTR	host-245.edge-fo.lon3.verisign.com
199.7.58.250	PTR	host-250.lon3.verisign.com
199.7.58.253	PTR	host-253.lon3.verisign.com
199.7.59.3	PTR	r1-v20-3.edge-fo.iad3.verisign.com
199.7.59.61	PTR	host-61.edge-fo.iad3.verisign.com
199.7.59.61	A	jobswhois.verisign-grs.com
199.7.59.61	A	ccwhois.verisign-grs.com
199.7.59.72	PTR	ocsp.iad3.verisign.com
199.7.59.74	PTR	whois.iad3.verisign.com
199.7.59.74	A	whois.nsiregistry.com
199.7.59.74	A	whois.internic.net
199.7.59.77	PTR	waps1.edge-fo.iad3.verisign.com
199.7.59.78	PTR	host-78.iad3.verisign.com
199.7.59.78	A	ns15.nstld.net
199.7.59.84	PTR	host-84.iad3.verisign.com
199.7.59.84	A	whois.nic.name
199.7.59.190	PTR	host-190.iad3.verisign.com
199.7.59.206	PTR	vl1.gslb.edge-fo.iad3.verisign.com
199.7.59.206	A	ns100.nstld.net
199.7.59.206	A	whoisns1.nstld.net
199.7.59.231	PTR	seal.iad3.verisign.com
199.7.59.232	PTR	thawteseal.iad3.verisign.com