Robtex

Up: 201.139.248.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 201.139.252.0/23
Down right: 201.139.254.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
201.139.252.104	A	mail3.royalresorts.com
201.139.252.131	PTR	mx2.pricetravel.com
201.139.252.131	A	mx2.viajesrecompensasindigo.com.mx
201.139.252.131	A	mx1.pricetravel.com.mx
201.139.253.41	A	crmdental.com
201.139.253.53	A	mail.playa-resorts.com
201.139.253.122	A	correo.ulsacancun.edu.mx
201.139.253.124	A	www.ulsacancun.edu.mx
201.139.253.156	A	www.dolphindiscoverymemories.com
201.139.253.156	A	dolphindiscoverymemories.com
201.139.253.249	A	www.autosnuevosyseminuevos.com
201.139.253.249	A	autosnuevosyseminuevos.com
201.139.255.249	A	wisewell.services
201.139.255.249	A	mail.mssm-mx.com
201.139.255.249	A	mail.mssminternational.com
201.139.255.250	A	mssminternational.com