Robtex

Up: 204.174.208.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 204.174.212.0/23
Down right: 204.174.214.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
204.174.212.110	A+PTR	bctaclngl011.bctel.net
204.174.213.29	A+PTR	abfd-d29.bctel.net
204.174.213.100	PTR	spare-213-d100.bctel.net
204.174.213.101	PTR	spare-213-d101.bctel.net
204.174.213.117	PTR	spare-213-d117.bctel.net
204.174.213.168	A+PTR	adv168.mutl-max01.bctel.net
204.174.213.215	PTR	spare-213-d215.bctel.net
204.174.213.241	PTR	spare-213-d241.bctel.net
204.174.214.10	A+PTR	vcta-d10.bctel.net
204.174.214.12	A+PTR	vcta-d12.bctel.net
204.174.214.50	A+PTR	pgrg-d50.bctel.net
204.174.214.59	A+PTR	pgrg-d59.bctel.net
204.174.214.114	A+PTR	klwn-d114.bctel.net
204.174.214.141	A+PTR	kmlp-d141.bctel.net
204.174.214.159	A+PTR	nnmo-d159.bctel.net
204.174.214.213	A+PTR	spare-214-d213.bctel.net
204.174.214.215	A+PTR	spare-214-d215.bctel.net
204.174.214.246	A+PTR	spare-214-d246.bctel.net
204.174.214.246	PTR	remus.bctel.net
204.174.215.26	PTR	host26.215.174.204.in-addr.arpa
204.174.215.52	PTR	host52.215.174.204.in-addr.arpa
204.174.215.67	A+PTR	smtp.ypg.com
204.174.215.69	A+PTR	smtp2.ypg.com
204.174.215.159	PTR	host159.215.174.204.in-addr.arpa
204.174.215.198	PTR	host198.215.174.204.in-addr.arpa
204.174.215.200	PTR	host200.215.174.204.in-addr.arpa
204.174.215.201	A+PTR	smtp1.domdir.com
204.174.215.201	A	domdir.com
204.174.215.201	A	smtp.domdir.com
204.174.215.202	PTR	smtp2.domdir.com
204.174.215.202	A	smtp.domdir.com
204.174.215.202	A	smtp.disisupersite.net
204.174.215.204	PTR	host204.215.174.204.in-addr.arpa
204.174.215.245	PTR	host245.215.174.204.in-addr.arpa
204.174.215.245	A	ns2.domdir.com
204.174.215.248	PTR	host248.215.174.204.in-addr.arpa
204.174.215.248	PTR	host249.215.174.204.in-addr.arpa
204.174.215.252	PTR	host252.215.174.204.in-addr.arpa