Robtex

Up: 74.116.248.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 74.116.252.0/23
Down right: 74.116.254.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
74.116.253.3	A+PTR	ns2.blackhillscorp.com
74.116.253.17	A	spica1.blackhillscorp.com
74.116.253.20	A+PTR	myport.blackhillscorp.com
74.116.253.21	A+PTR	mrc.mybhc.com
74.116.253.22	A+PTR	bhdcmsapp51.blackhillscorp.com
74.116.253.25	A+PTR	bhdcaddcp01.blackhillscorp.com
74.116.253.28	A+PTR	sdrc-godc1-mpe1.blackhillscorp.com
74.116.253.30	A+PTR	vpn.blackhillscorp.com
74.116.253.32	A+PTR	bhcu.blackhillscorp.com
74.116.253.32	A+PTR	bhdcwsvrp52.blackhillscorp.com
74.116.253.36	A+PTR	bhdccudap01.blackhillscorp.com
74.116.253.42	A+PTR	bhdctsm5p04.blackhillscorp.com
74.116.253.43	PTR	mybhc.com
74.116.253.44	A	iadmin.blackhillscorp.com
74.116.253.105	A+PTR	sdrcironp01.blackhillscorp.com
74.116.255.3	A+PTR	ns1.blackhillscorp.com
74.116.255.28	A+PTR	ftp.blackhillscorp.com
74.116.255.29	A	wwwnew.blackhillsenergy.com
74.116.255.30	A	www.gslb.serviceguard.com
74.116.255.30	A	peaceofmindperks.com
74.116.255.32	A+PTR	wwwtestnew.blackhillsenergy.com
74.116.255.32	A	wwwtest.serviceguard.com
74.116.255.32	A	wwwtest.blackhillsenergy.com
74.116.255.33	PTR	wwwtest.serviceguard.com
74.116.255.35	PTR	www.bhehowto.com
74.116.255.37	A	www.keepingenergyaffordable.com
74.116.255.37	A	www.gslb.keepingenergyaffordable.com
74.116.255.41	A	search.blackhillsenergy.com
74.116.255.43	A	gss-test.blackhillscorp.com
74.116.255.44	PTR	gss.blackhillscorp.com
74.116.255.49	A+PTR	bhdcaddcp02.blackhillscorp.com
74.116.255.50	A	bhdcaddcp03.blackhillscorp.com
74.116.255.51	A	bhdctmavp02.blackhillscorp.com
74.116.255.52	A+PTR	bhdccudap03.blackhillscorp.com
74.116.255.54	PTR	bh-power.com
74.116.255.54	A	www.blackhillspower.com
74.116.255.54	A	www.bh-power.com
74.116.255.55	PTR	cheyennelight.com
74.116.255.56	PTR	secure.blackhillscorp.com
74.116.255.56	A	bhep.com
74.116.255.56	A	wyodak.com
74.116.255.59	PTR	bhdccudap03.blackhillscorp.com
74.116.255.61	A	bhdcpsfnd01.blackhillscorp.com
74.116.255.62	A	mokc2w9ntfsx01.blackhillscorp.com
74.116.255.63	A	bhdcuptmp01.blackhillscorp.com
74.116.255.67	A	bhdcpsfnd02.blackhillscorp.com
74.116.255.72	A	customerverifications.com
74.116.255.72	A	blackhillcorp.com
74.116.255.72	A	youdentity.com
74.116.255.85	A	mybhc.blackhillscorp.com
74.116.255.91	A	bhdccudap02.blackhillscorp.com
74.116.255.94	A	access.blackhillscorp.com
74.116.255.105	A+PTR	nemiironp01.blackhillscorp.com
74.116.255.106	A	sip.blackhillscorp.com
74.116.255.144	A	sip.blackhillscorp.com