Robtex

Up: 38.99.246.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 38.99.247.0/25
Down right: 38.99.247.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
38.99.247.1	A+PTR	gateway1.shelcomm.com
38.99.247.4	A+PTR	rs1.shelcomm.com
38.99.247.5	A+PTR	weteachthinking.com
38.99.247.6	PTR	mail.worldofvoicemail.com
38.99.247.7	PTR	t38.shelcomm.com
38.99.247.8	PTR	shelcomm.com
38.99.247.8	A	glaserelectronics.com
38.99.247.8	A	mail.bluewave-broadband.com
38.99.247.10	PTR	realtime.shelcomm.com
38.99.247.11	PTR	cc1.shelcomm.com
38.99.247.12	PTR	office.shelcomm.com
38.99.247.13	A+PTR	thenocard.com
38.99.247.14	PTR	virt5.shelcomm.com
38.99.247.15	A+PTR	inb1.shelcomm.com
38.99.247.19	PTR	host1.shelcomm.com
38.99.247.19	A	ns.spaeinternational.com
38.99.247.19	A	ns.spae.com
38.99.247.21	PTR	termserver1.shelcomm.com
38.99.247.24	A+PTR	virt2.shelcomm.com
38.99.247.26	A+PTR	conf1.shelcomm.com
38.99.247.28	PTR	termserver2.shelcomm.com
38.99.247.35	PTR	mail2.shelcomm.com
38.99.247.39	A+PTR	pri2.shelcomm.com
38.99.247.41	A	mail.ttc-doctorsmessage.com
38.99.247.41	A	thefaxconnection.us
38.99.247.41	A	mail.thefaxconnection.us
38.99.247.134	A	limehd.cdnvideo.ru
38.99.247.137	A	dyn.1tv.cdnvideo.ru
38.99.247.170	A	shelltext.com
38.99.247.170	A	voice2group.com
38.99.247.170	A	appointmentdial.net
38.99.247.172	A+PTR	appointmentdial.com
38.99.247.179	A	callmexico.com
38.99.247.189	A	wild-wireless.com
38.99.247.189	A	bluewave-broadband.net
38.99.247.218	PTR	vm2.u4vmail.com
38.99.247.240	A	ivi-storage4.cdnvideo.ru
38.99.247.240	A	ivi-storage29.cdnvideo.ru
38.99.247.243	PTR	mail2.geniemail.com
38.99.247.243	A	mail.geniemail.com
38.99.247.243	A	smtp.geniemail.com