Robtex

Up: 68.87.76.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 68.87.76.0/25
Down right: 68.87.76.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
68.87.76.3	A+PTR	vl-301-ur02.sanjose.ca.sfba.comcast.net
68.87.76.4	A+PTR	sas-sjos-01p.sanjose.ca.sfba.comcast.net
68.87.76.6	A+PTR	sjos-cdn01.sanjose.ca.sanfran.comcast.net
68.87.76.9	A+PTR	sjos-cdn04.sanjose.ca.sanfran.comcast.net
68.87.76.56	A+PTR	speed-upload-01.sanjose.ca.sanfran.comcast.net
68.87.76.141	A+PTR	snjscababsjb.ssg.comcast.net
68.87.76.146	A	vl-351-ur01.sanjose.ca.sfba.comcast.net
68.87.76.164	A+PTR	cddns.sanjose.ca.sanfran.comcast.net
68.87.76.165	A+PTR	sjos-ddns01.sanjose.ca.sanfran.comcast.net
68.87.76.167	A+PTR	ddns.sanjose.ca.sanfran.comcast.net
68.87.76.170	A+PTR	sjos-kdc03.sanjose.ca.sanfran.comcast.net
68.87.76.177	A+PTR	vl250.sanjose.ca.sanfran.comcast.net
68.87.76.178	A+PTR	nrcns.sanjose.ca.sanfran.comcast.net
68.87.76.179	A	sjos-nrcns01.sanjose.ca.sanfran.comcast.net
68.87.76.182	A+PTR	cns.sanjose.ca.sanfran.comcast.net
68.87.76.182	A	calpers.comcastbiz.net
68.87.76.182	A	www.hcraeser.biz
68.87.76.184	A+PTR	sjos-cns02.sanjose.ca.sanfran.comcast.net
68.87.76.188	A	sjos-int-dns01b.sanjose.ca.sanfran.comcast.net
68.87.76.189	PTR	sjos-dnssec01b.sanjose.ca.sanfran.comcast.net
68.87.76.194	A	vl-666-ur01.sanjose.ca.sfba.comcast.net
68.87.76.195	A+PTR	vl-666-ur02.sanjose.ca.sfba.comcast.net
68.87.76.199	A+PTR	sjos-bdfb07b.sanjose.ca.sfba.comcast.net
68.87.76.211	A+PTR	ilo-ica02.sanjose.ca.sanfran.comcast.net
68.87.76.228	A+PTR	dns103.comcast.net
68.87.76.228	A	ns2.buyzooka.com
68.87.76.228	A	ns3.comcastbusiness.net
68.87.76.230	A+PTR	dns103e.sanjose.ca.sfba.comcast.net
68.87.76.230	A	dns103b.sanjose.ca.sfba.comcast.net