Robtex

Up: 66.17.64.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 66.17.96.0/20
Down right: 66.17.112.0/20
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.17.96.1	A	r1.brookings.net
66.17.96.6	A	dns1.brookings.net
66.17.96.7	A	diamond.brookings.net
66.17.96.10	A	filter.brookings.net
66.17.96.161	A+PTR	galaxy.brookingsutilities.com
66.17.96.161	A	swiftel-bmu.com
66.17.96.161	A	mail.brookingsutilities.com
66.17.96.187	A	rainbow.brookings.net
66.17.96.194	PTR	mail.larsondoors.com
66.17.96.194	A	mail.weatherstarwindows.com
66.17.96.194	A	mail.genius-screens.com
66.17.96.195	PTR	66-17-96-195-swiftel.brookings.net
66.17.96.242	A	66-17-96-242-swiftel.brookings.net
66.17.96.251	A	66-17-96-251-swiftel.brookings.net
66.17.96.251	A	mwseed.com
66.17.96.253	A	66-17-96-253-swiftel.brookings.net
66.17.97.223	A	66-17-97-223-swifteldialuptsc10.brookings.net
66.17.99.57	A	66-17-99-57-swiftel.brookings.net
66.17.99.77	A	dns2.brookings.net
66.17.99.80	A	swifteltv.com
66.17.99.80	A	swiftel.net
66.17.99.80	A	www.swiftel.net
66.17.99.98	A	66-17-99-98-swiftel.brookings.net
66.17.99.148	A	66-17-99-148-swiftel.brookings.net
66.17.100.2	PTR	66-17-100-2-swiftel.brookings.net
66.17.100.18	A	66-17-100-18-swiftel.brookings.net
66.17.100.35	A	swiftelinat2.brookings.net
66.17.100.65	A+PTR	66-17-100-65-swiftel.brookings.net
66.17.100.66	A+PTR	66-17-100-66-swiftel.brookings.net
66.17.100.67	PTR	mail2.capitalcardservices.com
66.17.100.67	A	mail2.accountlook.com
66.17.100.67	A	mail2.capitalpreferredcredit.com
66.17.100.96	A+PTR	66-17-100-96-swiftel.brookings.net
66.17.100.106	A	66-17-100-106-swiftel.brookings.net
66.17.100.110	A	66-17-100-110-swiftel.brookings.net
66.17.100.111	A	ns2.firstnationalcc.com
66.17.100.130	A+PTR	mail.brookingscountysd.gov
66.17.100.132	A	mail1.brookingscountysd.gov
66.17.100.138	A	mx.cityofbrookings.org
66.17.100.140	A	mx.engagebrookings.org
66.17.100.196	A	mail.statealum.com
66.17.100.196	A	mail.statealum.org
66.17.100.196	A	mail.sdsufoundation.org
66.17.101.129	PTR	66-17-101-129-swiftelnet.brookings.net
66.17.101.217	A	schaarfamily.com
66.17.102.3	A	66-17-102-3-swiftelnet.brookings.net
66.17.103.47	A	mail.century21brookings.com
66.17.103.47	A	mail.century21gka.com
66.17.103.55	A	mail.urcpp.com
66.17.103.55	A	mail.ulcbrookings.com
66.17.103.69	A	mail.gdmdata.com
66.17.103.69	A	mail.gdmdata.org
66.17.103.69	A	mail.gdmdata.net
66.17.103.80	A	66-17-103-80-swiftelnet.brookings.net
66.17.106.58	A	glaciallakes.net
66.17.106.98	PTR	66-17-106-98-swiftelnet.brookings.net
66.17.106.98	A	mail.avsassociates.com
66.17.106.98	A	mail.dairynet2000.com
66.17.107.33	A	mail.midwesttitleinc.com
66.17.107.141	A	mail.bannerbkgs.com
66.17.107.141	A	mail.bannerassociates.com
66.17.107.152	A	ftpmcs.com
66.17.107.152	A	mcssd.net
66.17.107.187	A	mail.keyconnectionsre.com
66.17.107.187	A	mail.valleyviewdairy.com
66.17.107.194	A+PTR	66-17-107-194-swiftelnet.brookings.net
66.17.107.194	A	mail.brookingshealth.org
66.17.107.214	A	advancebkg.com
66.17.107.221	A	mail.brookingsareatransit.com
66.17.107.233	A	mail.ibsolutions-llc.com
66.17.107.234	A	mail.wslawfirm.net
66.17.107.234	A	hosted.ibsolutions-llc.com
66.17.107.234	A	mail.colmanbuildingcenter.com
66.17.108.37	A	66-17-108-37-swiftelnet.brookings.net
66.17.108.111	A	66-17-108-111-swiftelnet.brookings.net
66.17.108.140	A	niceout.net
66.17.108.218	A	66-17-108-218-swiftelnet.brookings.net
66.17.108.245	A	66-17-108-245-swiftelnet.brookings.net
66.17.108.251	A	66-17-108-251-swiftelnet.brookings.net
66.17.109.2	A+PTR	66-17-109-2-swiftelnet.brookings.net
66.17.109.194	A	66-17-109-194-swiftelnet.brookings.net
66.17.109.225	A	66-17-109-225-swiftelnet.brookings.net
66.17.110.2	A+PTR	66-17-110-2-swiftelnet.brookings.net
66.17.110.7	A	66-17-110-7-swiftelnet.brookings.net
66.17.110.7	A	jackrabbitnation.com
66.17.110.7	A	behindthedish.com
66.17.110.42	A	66-17-110-42-swiftelnet.brookings.net
66.17.110.131	A	66-17-110-131-swiftelnet.brookings.net
66.17.110.207	A	66-17-110-207-swiftelnet.brookings.net
66.17.110.245	A	66-17-110-245-swiftelnet.brookings.net
66.17.111.141	A	66-17-111-141-swiftelnet.brookings.net
66.17.112.73	A	cobaltsky.net
66.17.112.116	A	66-17-112-116-swiftelnet.brookings.net
66.17.112.178	A	rggconsulting.us
66.17.112.178	A	66-17-112-178-swiftelnet.brookings.net
66.17.112.228	A	66-17-112-228-swiftelnet.brookings.net
66.17.113.62	A	mail.millsproperty.com
66.17.113.182	A	rggconsulting.com
66.17.114.94	A	myancestryonline.com
66.17.114.94	A	66-17-114-94-swiftelnet.brookings.net
66.17.114.120	A	rotll.com
66.17.114.213	A	66-17-114-213-swiftelnet.brookings.net
66.17.115.5	A	mail.brookingsleo.com
66.17.115.5	A	mail.brookingsleo.org
66.17.115.5	A	brookingsleo.org
66.17.115.44	A	mail.hildebrantcpa.com
66.17.115.55	A	niceout.org
66.17.115.55	A	apex365.net
66.17.115.82	A	mail.4rtilab.com
66.17.115.82	A	mail.ruraltechinc.com
66.17.116.111	A	66-17-116-111-swifteldsl.brookings.net
66.17.116.238	A	66-17-116-238-swifteldsl.brookings.net
66.17.117.12	A	66-17-117-12-swifteldsl.brookings.net
66.17.117.60	A	66-17-117-60-swifteldsl.brookings.net
66.17.117.126	A	66-17-117-126-swifteldsl.brookings.net
66.17.117.236	A	66-17-117-236-swifteldsl.brookings.net
66.17.117.241	A	66-17-117-241-swifteldsl.brookings.net
66.17.119.34	A	66-17-119-34-swifteldsl.brookings.net
66.17.119.94	A	66-17-119-94-swifteldsl.brookings.net
66.17.119.145	A	66-17-119-145-swifteldsl.brookings.net
66.17.119.229	A	66-17-119-229-swifteldsl.brookings.net
66.17.119.231	A	66-17-119-231-swifteldsl.brookings.net
66.17.120.46	A	66-17-120-46-swifteldsl.brookings.net
66.17.120.110	A	66-17-120-110-swifteldsl.brookings.net
66.17.120.133	A	66-17-120-133-swifteldsl.brookings.net
66.17.120.149	A	66-17-120-149-swifteldsl.brookings.net
66.17.120.171	A	lounsbery.net
66.17.120.171	A	66-17-120-171-swifteldsl.brookings.net
66.17.120.228	A	66-17-120-228-swifteldsl.brookings.net
66.17.120.230	A	66-17-120-230-swifteldsl.brookings.net
66.17.124.240	A	66-17-124-240-swifteldsl.brookings.net
66.17.125.3	PTR	66-17-125-3-swiftelnet.brookings.net
66.17.125.20	A	mxbackup.preceptdesign.com
66.17.125.20	A	mail2.preceptdesign.com
66.17.125.81	A	66-17-125-81-swifteldsl.brookings.net
66.17.125.147	A	kepfordapts.com
66.17.125.205	A	purplevan.net
66.17.126.44	A	66-17-126-44-swifteldsl.brookings.net
66.17.126.243	A	johnnysgym.com
66.17.126.243	A	bicketts.us
66.17.126.243	A	cnssinc.net