Robtex

Up: 131.219.4.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 131.219.5.0/25
Down right: 131.219.5.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
131.219.5.2	A+PTR	service2.pacificorp.com
131.219.5.3	A+PTR	service3.pacificorp.com
131.219.5.7	A	raweb.pacificorp.com
131.219.5.8	A	mvwebe.pacificorp.com
131.219.5.10	A+PTR	service5.pacificorp.com
131.219.5.17	A	cloud.pacificorp.com
131.219.5.21	A	www.utah-power.net
131.219.5.21	A	pacificpowerandlight.com
131.219.5.21	A	utahpower.org
131.219.5.37	A	meet.rockymountainpower.net
131.219.5.37	A	lyncweb.pacificorp.com
131.219.5.45	A	eide.pacificorp.com
131.219.5.46	A	eidetest.pacificorp.com
131.219.5.50	A	as.pacificorp.com
131.219.5.56	A+PTR	email-pdx.pacificorp.com
131.219.5.57	A+PTR	mail-pdx.midamerican.com
131.219.5.58	A+PTR	email-pdx.calenergy.com
131.219.5.59	A	email-pdx.cordovaenergy.com
131.219.5.60	A	email-pdx.kernrivergas.com
131.219.5.61	A+PTR	email-pdx.midamerican.com
131.219.5.62	A+PTR	email-pdx.nngco.com
131.219.5.63	A+PTR	smtp-pdx.midamerican.com
131.219.5.64	A	webmail.pacificorp.com
131.219.5.65	A+PTR	ppwmail.pacificorp.com
131.219.5.73	A	cserv-pdx.pacificorp.com
131.219.5.74	A	pacificorpmobile.pacificorp.com
131.219.5.75	A	devmobile.pacificorp.com
131.219.5.77	A+PTR	smtp-pdx01.pacificorp.com
131.219.5.78	A+PTR	smtp-pdx02.pacificorp.com
131.219.5.90	A	gridtest.pacificorp.com
131.219.5.101	A	pdxsip.pacificorp.com
131.219.5.108	A	cobrowse.rockymountainpower.net
131.219.5.108	A	cobrowse.pacificpower.net
131.219.5.117	A	lct05-inetgss.pacificorp.com
131.219.5.135	A	csappsprod.pacificpower.net
131.219.5.136	A	csappsprod.rockymountainpower.net
131.219.5.137	A	statcont.prod.pacificorp.com
131.219.5.222	A	pacificorp.com
131.219.5.222	A	www.pacificorp.com
131.219.5.223	A	rockymountainpower.net
131.219.5.223	A	www.rockymountainpower.net
131.219.5.224	A	pacificpower.net
131.219.5.224	A	www.pacificpower.net
131.219.5.225	A	grid.pacificorp.com
131.219.5.227	A	wattsmart.com
131.219.5.227	A	bewattsmart.com
131.219.5.227	A	rockymountainpower-pacificpower.net