Robtex

Up: 199.187.24.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 199.187.28.0/23
Down right: 199.187.30.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
199.187.28.1	A	billings.lightnex.net
199.187.28.26	A	speedtest.blgt.mt-opticom.com
199.187.28.39	A	cust-199-187-28-39.billings.lightnex.net
199.187.28.100	PTR	cust-199-187-28-100.billings.mt-opticom.com
199.187.28.100	A	ns1.vividnetworks.com
199.187.28.100	A	virtual.cottonwood-productions.com
199.187.28.101	PTR	cust-199-187-28-101.billings.mt-opticom.com
199.187.28.103	PTR	cust-199-187-28-103.billings.mt-opticom.com
199.187.28.105	PTR	cust-199-187-28-105.billings.mt-opticom.com
199.187.28.105	A	brock.cotcomsol.com
199.187.28.106	PTR	mail.lightnex.net
199.187.28.106	A	besto.cotcomsol.com
199.187.28.107	PTR	cust-199-187-28-107.billings.mt-opticom.com
199.187.28.107	A	www.lightnex.com
199.187.28.107	A	lightnex.org
199.187.28.108	PTR	mail.lightnex.net
199.187.28.109	PTR	cust-199-187-28-109.billings.mt-opticom.com
199.187.28.109	A	frontpage.cotcomsol.com
199.187.28.118	A	webmail.lightnex.net
199.187.28.125	PTR	mail.lightnex.net
199.187.28.125	PTR	cust-199-187-28-125.billings.mt-opticom.com
199.187.28.125	A	mail.bigskyrcontrol.com
199.187.28.132	PTR	cust-199-187-28-132.billings.mt-opticom.com
199.187.29.27	PTR	cust-199-187-29-27.billings.lightnex.net
199.187.29.170	A	cray.cotcomsol.com
199.187.29.170	A	mail.genomexchange.net
199.187.29.170	A	mail.genomexchange.org
199.187.29.172	A	rails-production.cotcomsol.com
199.187.30.5	PTR	cust-199-187-30-5.billings.lightnex.net
199.187.31.32	PTR	cust-199-187-31-32.billings.lightnex.net
199.187.31.40	PTR	remote.bozemanairport.com
199.187.31.40	A	mail.gallatinfield.com
199.187.31.172	A+PTR	cust-199-187-31-172.billings.lightnex.net
199.187.31.255	PTR	cust-199-187-31-255.billings.lightnex.net