Robtex

Up: 68.87.64.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 68.87.68.0/23
Down right: 68.87.70.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
68.87.68.1	A	vl301.s3woodstock.ga.atlanta.comcast.net
68.87.68.2	A	vl-301-ur01.s3ndigital.ga.atlanta.comcast.net
68.87.68.3	A	vl-301-ur02.s3ndigital.ga.atlanta.comcast.net
68.87.68.47	A	rtdyns01.s3woodstock.ga.atlanta.comcast.net
68.87.68.50	A	ica01.s3woodstock.ga.atlanta.comcast.net
68.87.68.131	A	vl-351-ur02.s3ndigital.ga.atlanta.comcast.net
68.87.68.134	A	cdn-ce-atlt-t2-03.s3woodstock.ga.atlanta.comcast.net
68.87.68.162	A+PTR	nrcns.s3woodstock.ga.atlanta.comcast.net
68.87.68.162	A	lorddarcy.net
68.87.68.163	PTR	atlt-cns01b.s3woodstock.ga.atlanta.comcast.net
68.87.68.166	A+PTR	cns.s3woodstock.ga.atlanta.comcast.net
68.87.68.166	A	mail.hfworders.com
68.87.68.166	A	a-68-87-68-166.jamespatedds.com
68.87.68.167	PTR	atlt-cns01.s3woodstock.ga.atlanta.comcast.net
68.87.68.168	PTR	atlt-cns02.s3woodstock.ga.atlanta.comcast.net
68.87.68.169	A	atlt-dnssec02.s3woodstock.ga.atlanta.comcast.net
68.87.68.170	A	atlt-dns-trial.s3woodstock.ga.atlanta.comcast.net
68.87.68.172	A	atlt-int-dns01b.s3woodstock.ga.atlanta.comcast.net
68.87.68.173	A	atlt-dnssec01b.s3woodstock.ga.atlanta.comcast.net
68.87.68.181	A+PTR	atlt-ddns01.s3woodstock.ga.atlanta.comcast.net
68.87.68.182	A+PTR	atlt-ddns02.s3woodstock.ga.atlanta.comcast.net
68.87.68.183	PTR	atlt-cddns01.s3woodstock.ga.atlanta.comcast.net
68.87.68.186	A+PTR	ddns.s3woodstock.ga.atlanta.comcast.net
68.87.68.188	A	atlt-ddns04.s3woodstock.ga.atlanta.comcast.net
68.87.68.195	A+PTR	vl-666-ur02.s3ndigital.ga.atlanta.comcast.net
68.87.68.200	A	ddns01.s3woodstock.ga.atlanta.comcast.net
68.87.68.201	A+PTR	ddns02.s3woodstock.ga.atlanta.comcast.net
68.87.68.208	A	ilo-ica01.s3woodstock.ga.atlanta.comcast.net
68.87.68.228	A	mail.brockwells.net
68.87.68.228	A	autonomybay.com
68.87.68.244	A+PTR	dns104.comcast.net
68.87.68.244	A	ns4.comcastbusiness.net
68.87.68.244	A	dns104.comcast.org
68.87.68.245	PTR	dns104d.s3woodstock.ga.atlanta.comcast.net
68.87.69.50	A	ica01.beaverton.or.bverton.comcast.net
68.87.69.115	A+PTR	copasp-bvrt-a01p.sys.comcast.net
68.87.69.125	A	ops-dhcp-03.beaverton.or.bverton.comcast.net
68.87.69.131	A	vl-351-ur02.beaverton.or.bverton.comcast.net
68.87.69.135	A	cdn-ce-bvrt-t2-04.beaverton.or.bverton.comcast.net
68.87.69.146	A+PTR	nrcns.beaverton.or.bverton.comcast.net
68.87.69.147	PTR	bvrt-cns01b.beaverton.or.bverton.comcast.net
68.87.69.150	A+PTR	cns.beaverton.or.bverton.comcast.net
68.87.69.151	A+PTR	bvrt-cns01.beaverton.or.bverton.comcast.net
68.87.69.153	PTR	bvrt-dnssec02.beaverton.or.bverton.comcast.net
68.87.69.154	A+PTR	bvrt-dns-trial.beaverton.or.bverton.comcast.net
68.87.69.157	A+PTR	bvrt-dnssec01b.beaverton.or.bverton.comcast.net
68.87.69.158	A+PTR	bvrt-dnssec02b.beaverton.or.bverton.comcast.net
68.87.69.163	A	vl100-lb02.beaverton.or.bverton.comcast.net
68.87.69.167	A+PTR	ddns.beaverton.or.bverton.comcast.net
68.87.69.171	A	kdc.beaverton.or.bverton.comcast.net
68.87.69.213	A	ilo-bvrt-dns-trial.beaverton.or.bverton.comcast.net
68.87.70.1	A	vl-110.emeryville.ca.oakl3.comcast.net
68.87.70.9	A+PTR	bowc-cdn04.bowcroft.ca.la.comcast.net
68.87.70.13	A	mail-ns01.emeryville.ca.oakl3.comcast.net
68.87.70.81	A+PTR	ing-ccdn-ps-em-14.emeryville.ca.oakl3.comcast.net
68.87.70.139	A+PTR	eth5-ccdn-ps-em-02.emeryville.ca.oakl3.comcast.net
68.87.70.147	A+PTR	eth5-ccdn-ps-em-04.emeryville.ca.oakl3.comcast.net
68.87.70.153	A+PTR	eth3-ccdn-ps-em-06.emeryville.ca.oakl3.comcast.net
68.87.70.161	A+PTR	eth3-ccdn-ps-em-08.emeryville.ca.oakl3.comcast.net
68.87.70.196	A+PTR	eth6-ccdn-ps-em-01.emeryville.ca.oakl3.comcast.net
68.87.70.198	A+PTR	eth8-ccdn-ps-em-01.emeryville.ca.oakl3.comcast.net
68.87.70.218	A+PTR	eth8-ccdn-ps-em-06.emeryville.ca.oakl3.comcast.net
68.87.71.2	A+PTR	vl-301-ur01.chelmsfdrdc2.ma.boston.comcast.net
68.87.71.6	PTR	chlm-cdn01.chelmsfdrdc2.ma.boston.comcast.net
68.87.71.29	A	speed-upload-01.chelmsfdrdc2.ma.boston.comcast.net
68.87.71.38	A	pcr1-1.chelmsfdrdc2.ma.boston.comcast.net
68.87.71.101	PTR	chlm-staging02.chelmsfdrdc2.ma.boston.comcast.net
68.87.71.126	A	ops-dhcp-08.chelmsfdrdc2.ma.boston.comcast.net
68.87.71.157	A	ge-7-48-ur02-d.chelmsfdrdc2.ma.boston.comcast.net
68.87.71.165	PTR	chlm-ddns01.chelmsfdrdc2.ma.boston.comcast.net
68.87.71.166	A	chlm-ddns02.chelmsfdrdc2.ma.boston.comcast.net
68.87.71.167	A+PTR	ddns.chelmsfdrdc2.ma.boston.comcast.net
68.87.71.226	A+PTR	nrcns.chelmsfdrdc2.ma.boston.comcast.net
68.87.71.227	A+PTR	chlm-cns01b.chelmsfdrdc2.ma.boston.comcast.net
68.87.71.227	A	chlm-nrcns01.chelmsfdrdc2.ma.boston.comcast.net
68.87.71.228	PTR	chlm-cns02b.chelmsfdrdc2.ma.boston.comcast.net
68.87.71.229	A+PTR	chlm-dnssec01.chelmsfdrdc2.ma.boston.comcast.net
68.87.71.230	A+PTR	cns.chelmsfdrdc2.ma.boston.comcast.net
68.87.71.233	A+PTR	chlm-dnssec02.chelmsfdrdc2.ma.boston.comcast.net
68.87.71.237	A+PTR	chlm-dnssec01b.chelmsfdrdc2.ma.boston.comcast.net
68.87.71.238	A+PTR	chlm-dnssec02b.chelmsfdrdc2.ma.boston.comcast.net
68.87.71.242	A+PTR	vl-240-ur01.chelmsfdrdc2.ma.boston.comcast.net