Robtex

Up: 143.255.56.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 143.255.56.0/25
Down right: 143.255.56.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
143.255.56.18	PTR	143-255-56-18.static.hostdime.com
143.255.56.18	A	ceictecsalud.mx
143.255.56.19	PTR	143-255-56-19.static.hostdime.com
143.255.56.19	A	dns29304.dizinc.com
143.255.56.20	PTR	143-255-56-20.static.hostdime.com
143.255.56.20	A	dns29305.dizinc.com
143.255.56.51	PTR	143-255-56-51.static.dimenoc.com
143.255.56.99	PTR	143-255-56-99.static.dimenoc.com
143.255.56.100	PTR	143-255-56-100.static.hostdime.com
143.255.56.100	A	principalresortgroup.com
143.255.56.101	PTR	143-255-56-101.static.dimenoc.com
143.255.56.107	PTR	143-255-56-107.static.dimenoc.com
143.255.56.122	A+PTR	server.bruscoo.com
143.255.56.122	A	tacode.co
143.255.56.123	PTR	143-255-56-123.static.hostdime.com
143.255.56.123	A	ns1.bruscoo.com
143.255.56.124	PTR	143-255-56-124.static.hostdime.com
143.255.56.124	A	ns2.bruscoo.com
143.255.56.154	PTR	143-255-56-154.static.hostdime.com
143.255.56.154	A	latitude21res.com
143.255.56.162	PTR	143-255-56-162.static.dimenoc.com
143.255.56.162	A	sanluis.gob.mx
143.255.56.162	A	mail.municipiodeslp.gob.mx
143.255.56.197	PTR	143-255-56-197.static.dimenoc.com
143.255.56.202	PTR	143-255-56-202.static.dimenoc.com
143.255.56.202	A	conferenciasb2b.com
143.255.56.227	PTR	143-255-56-227.static.dimenoc.com
143.255.56.250	PTR	qub.mx
143.255.56.250	A	dydtelcom.com
143.255.56.250	A	eventoscontigo.com
143.255.56.251	PTR	143-255-56-251.static.dimenoc.com
143.255.56.251	A	mail.descubrete.com.mx
143.255.56.251	A	mail.eraseunavez-eventos.com