Robtex

Up: 208.53.0.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 208.53.0.0/25
Down right: 208.53.0.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
208.53.0.2	A+PTR	inbound.barracuda.carolinadigital.net
208.53.0.5	PTR	voip-public.gateway-server.carolinadigitalphone.com
208.53.0.10	A	internal-dns.guilfordcomm.net
208.53.0.14	A+PTR	backup.carolinanet.com
208.53.0.20	A+PTR	themaildefender.com
208.53.0.20	A	inbound.themaildefender.com
208.53.0.30	A+PTR	dns2.guilfordcomm.net
208.53.0.30	A	dns2.name-resolver.com
208.53.0.66	A	downtowngreensboro.us
208.53.0.118	A	askandy.info
208.53.0.130	PTR	server4.managesites.com
208.53.0.130	A	www.tascommunicationservices.com
208.53.0.130	A	partnersendinghomelessness.org
208.53.0.131	PTR	mimas.managesites.com
208.53.0.134	A	mail.vasquezpainting.com
208.53.0.134	A	ramhomesinc.com
208.53.0.134	A	mx.vasquezpainting.com
208.53.0.135	PTR	rhea.managesites.com
208.53.0.135	A	keriocloudmail.com
208.53.0.135	A	kerioconnectmail.com
208.53.0.137	PTR	iapetus.managesites.com
208.53.0.140	A	carolinanet.com
208.53.0.140	A	www.themaildefender.com
208.53.0.140	A	carolinanet.net
208.53.0.141	A	herb-barber-sons.com
208.53.0.141	A	www.herb-barber-sons.com
208.53.0.149	A	unitedwaygso.org
208.53.0.149	A	www.unitedwaygso.org
208.53.0.150	A	callbroadcasting.net
208.53.0.150	A	dc-f083ca63.politicalannouncement.com
208.53.0.150	A	telephonecampaign.com
208.53.0.209	A	gige-3-2-0-juniper-m20-to-gige-0-1-cisco3550-2.guilfordcomm.net
208.53.0.250	A+PTR	mail.guilfordcomm.net
208.53.0.250	A	mail.fbl-monitoring.com
208.53.0.250	A	mail.guilfordcommunications.com