Robtex

Up: 216.101.224.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 216.101.240.0/21
Down right: 216.101.248.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
216.101.241.40	A	*.spamqa.net
216.101.241.40	A	spamqa.net
216.101.241.40	A	ns2.spamqa.net
216.101.241.69	A	ngsimon.com
216.101.241.86	A	mail.esgqa.com
216.101.241.109	A	bh987.com
216.101.241.155	A	engmail.kieft.us
216.101.241.221	A	bn-dr-sf01.barracuda.com
216.101.241.222	A	bn-dr-sf02.barracuda.com
216.101.241.224	A	email.einets.com
216.101.241.238	A	mail.hillwork.net
216.101.241.238	A	sbs.hillwork.net
216.101.242.57	A	adsl-216-101-242-57.dsl.snfc21.pacbell.net
216.101.242.102	A	adsl-216-101-242-102.dsl.snfc21.pacbell.net
216.101.242.123	A	adsl-216-101-242-123.dsl.snfc21.pacbell.net
216.101.244.29	A	adsl-216-101-244-29.dsl.snfc21.pacbell.net
216.101.244.40	A	adsl-216-101-244-40.dsl.snfc21.pacbell.net
216.101.244.206	A	adsl-216-101-244-206.dsl.snfc21.pacbell.net
216.101.245.3	A+PTR	adsl-216-101-245-3.dsl.snfc21.pacbell.net
216.101.245.17	A+PTR	adsl-216-101-245-17.dsl.snfc21.pacbell.net
216.101.245.108	A	adsl-216-101-245-108.dsl.snfc21.pacbell.net
216.101.245.171	A	adsl-216-101-245-171.dsl.snfc21.pacbell.net
216.101.245.212	A	adsl-216-101-245-212.dsl.snfc21.pacbell.net
216.101.246.179	PTR	216-101-246-179.ded.pacbell.net
216.101.248.1	A+PTR	adsl-216-101-248-1.dsl.snfc21.pacbell.net
216.101.248.75	A+PTR	adsl-216-101-248-75.dsl.snfc21.pacbell.net
216.101.248.82	A+PTR	adsl-216-101-248-82.dsl.snfc21.pacbell.net
216.101.248.106	A	adsl-216-101-248-106.dsl.snfc21.pacbell.net
216.101.248.213	A	adsl-216-101-248-213.dsl.snfc21.pacbell.net
216.101.252.2	A+PTR	adsl-216-101-252-2.dsl.snfc21.pacbell.net
216.101.252.62	A	adsl-216-101-252-62.dsl.snfc21.pacbell.net
216.101.252.73	A	adsl-216-101-252-73.dsl.snfc21.pacbell.net
216.101.252.117	A	adsl-216-101-252-117.dsl.snfc21.pacbell.net
216.101.252.118	A	adsl-216-101-252-118.dsl.snfc21.pacbell.net
216.101.252.160	A+PTR	adsl-216-101-252-160.dsl.snfc21.pacbell.net
216.101.252.174	A	adsl-216-101-252-174.dsl.snfc21.pacbell.net
216.101.252.244	A	adsl-216-101-252-244.dsl.snfc21.pacbell.net
216.101.253.88	A	adsl-216-101-253-88.dsl.snfc21.pacbell.net
216.101.253.89	A	adsl-216-101-253-89.dsl.snfc21.pacbell.net
216.101.253.108	A	adsl-216-101-253-108.dsl.snfc21.pacbell.net
216.101.253.111	A	adsl-216-101-253-111.dsl.snfc21.pacbell.net
216.101.253.212	A	adsl-216-101-253-212.dsl.snfc21.pacbell.net
216.101.254.73	A	av.actiance.com
216.101.254.73	A	sip.actiance.com
216.101.254.122	A+PTR	click.actiance.net
216.101.254.191	A	ns2.actiance.com