Robtex

Up: 76.77.224.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 76.77.240.0/21
Down right: 76.77.248.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
76.77.240.0	PTR	client-76.77.240.0.dfwtx.partnershipbroadband.com
76.77.240.39	A	client-76.77.240.39.dfwtx.partnershipbroadband.com
76.77.241.19	PTR	client-76.77.241.19.dfwtx.partnershipbroadband.com
76.77.241.19	A	dsfsportswear.com
76.77.241.19	A	mail.punkyhead.org
76.77.242.1	PTR	client-76.77.242.1.dfwtx.partnershipbroadband.com
76.77.242.32	PTR	client-76.77.242.32.dfwtx.partnershipbroadband.com
76.77.242.33	PTR	client-76.77.242.33.dfwtx.partnershipbroadband.com
76.77.242.34	PTR	client-76.77.242.34.dfwtx.partnershipbroadband.com
76.77.242.49	PTR	client-76.77.242.49.dfwtx.partnershipbroadband.com
76.77.242.67	PTR	client-76.77.242.67.dfwtx.partnershipbroadband.com
76.77.242.145	PTR	client-76.77.242.145.dfwtx.partnershipbroadband.com
76.77.242.146	PTR	client-76.77.242.146.dfwtx.partnershipbroadband.com
76.77.242.162	A	client-76.77.242.162.dfwtx.partnershipbroadband.com
76.77.242.178	PTR	client-76.77.242.178.dfwtx.partnershipbroadband.com
76.77.242.179	PTR	client-76.77.242.179.dfwtx.partnershipbroadband.com
76.77.242.193	PTR	client-76.77.242.193.dfwtx.partnershipbroadband.com
76.77.242.195	PTR	client-76.77.242.195.dfwtx.partnershipbroadband.com
76.77.242.224	PTR	client-76.77.242.224.dfwtx.partnershipbroadband.com
76.77.242.225	PTR	client-76.77.242.225.dfwtx.partnershipbroadband.com
76.77.242.242	PTR	client-76.77.242.242.dfwtx.partnershipbroadband.com
76.77.242.243	PTR	client-76.77.242.243.dfwtx.partnershipbroadband.com
76.77.247.1	PTR	client-76.77.247.1.dfwtx.partnershipbroadband.com
76.77.247.18	PTR	client-76.77.247.18.dfwtx.partnershipbroadband.com
76.77.247.64	PTR	client-76.77.247.64.dfwtx.partnershipbroadband.com
76.77.247.99	PTR	client-76.77.247.99.dfwtx.partnershipbroadband.com
76.77.247.112	PTR	client-76.77.247.112.dfwtx.partnershipbroadband.com
76.77.247.113	PTR	client-76.77.247.113.dfwtx.partnershipbroadband.com
76.77.247.130	PTR	client-76.77.247.130.dfwtx.partnershipbroadband.com
76.77.247.145	PTR	client-76.77.247.145.dfwtx.partnershipbroadband.com
76.77.247.146	PTR	client-76.77.247.146.dfwtx.partnershipbroadband.com
76.77.247.162	PTR	client-76.77.247.162.dfwtx.partnershipbroadband.com
76.77.247.174	A	client-76.77.247.174.dfwtx.partnershipbroadband.com
76.77.247.194	PTR	client-76.77.247.194.dfwtx.partnershipbroadband.com
76.77.247.195	PTR	client-76.77.247.195.dfwtx.partnershipbroadband.com
76.77.247.211	PTR	client-76.77.247.211.dfwtx.partnershipbroadband.com
76.77.247.227	PTR	client-76.77.247.227.dfwtx.partnershipbroadband.com
76.77.247.241	PTR	client-76.77.247.241.dfwtx.partnershipbroadband.com
76.77.247.242	PTR	client-76.77.247.242.dfwtx.partnershipbroadband.com
76.77.248.48	PTR	client-76.77.248.48.dfwtx.partnershipbroadband.com
76.77.250.238	A	mushroomgames.com
76.77.251.69	A	client-76.77.251.69.dfwtx.partnershipbroadband.com
76.77.252.200	A	mail.hdfetty.com
76.77.252.228	A	functionalmed.org
76.77.252.228	A	functionalmed.net
76.77.252.228	A	mail.functionalmed.org
76.77.253.203	A	mail.lassiterinc.com
76.77.254.121	A	duvall1995.com
76.77.254.130	A	flybarstriping.com
76.77.255.44	A	mail3.thomastech.com
76.77.255.44	A	thomastech.com
76.77.255.44	A	mail.thomastech.com
76.77.255.81	PTR	client-76.77.255.81.dfwtx.partnershipbroadband.com
76.77.255.197	A	client-76.77.255.197.dfwtx.partnershipbroadband.com
76.77.255.216	A	mail.ishopopps.com
76.77.255.216	A	mail.segurosdirectinc.com
76.77.255.216	A	mail.sdinc.cc