Robtex

Up: 216.194.128.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 216.194.136.0/22
Down right: 216.194.140.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
216.194.137.8	A+PTR	dns3.nextelinternational.com
216.194.137.8	PTR	ns1.messaging.nextel.com
216.194.137.8	A+PTR	ns1.mso-peru.nextelinternational.com
216.194.137.9	PTR	dns4.nextelinternational.com
216.194.137.19	A	standby.nextelinternational.com
216.194.137.29	PTR	msgattmex.mx
216.194.137.29	A	msgnextel.nextelinternational.com
216.194.137.29	A	mexmessag.nextelinternational.com
216.194.137.51	A+PTR	ialarm.com.mx
216.194.137.51	A+PTR	www.ialarm.com.mx
216.194.137.57	A+PTR	www.nextelinternational.com
216.194.137.57	A	nextelinternacional.com
216.194.137.57	A	mail.nextelinternacional.com
216.194.137.65	PTR	telefonicamoviles.com.mx
216.194.137.65	A	finder.probusinessapps.mx
216.194.137.93	A+PTR	msgattmex.mx
216.194.137.93	A	msgnextel.nextelinternational.com
216.194.137.93	A	mailhost.msgnextel.com.mx
216.194.137.117	A	www.pushtotweet.com.br
216.194.137.117	A	pushtotweet.com.br
216.194.137.117	A	pushtofacebook.com.br
216.194.139.202	A	mexagpslm03.nextelinternational.com
216.194.141.119	A	mso-peru.nextelinternational.com
216.194.142.4	A+PTR	mmsc1.nextelinternational.com
216.194.142.5	A+PTR	mmsc2.nextelinternational.com
216.194.142.7	A	mmsc4.nextelinternational.com
216.194.142.11	PTR	mmsc8.nextelinternational.com
216.194.142.11	A	mmsppg.nextelinternational.com
216.194.142.12	A	mmsc9.nextelinternational.com
216.194.142.12	A	mms.nextel.com.pe
216.194.142.12	A	mmscr.nextelinternational.com
216.194.142.22	PTR	pushtomail.com.mx
216.194.142.23	A+PTR	mail01.pushtomail.com.mx
216.194.142.203	A	mexmessag.nextelinternational.com
216.194.142.214	A	wsservice.nextelinternational.com
216.194.142.222	A	msgnextel.nextelinternational.com
216.194.142.242	A	mmspre.nextelinternational.com