Robtex

Up: 31.172.144.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 31.172.144.0/22
Down right: 31.172.148.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
31.172.144.39	A	mail.bbi-edu.eu
31.172.144.128	PTR	128.144.172.31.adsl.internet.lu
31.172.144.173	A	catv-steinsel-31-172-144-173.internet.lu
31.172.144.232	A	catv-steinsel-31-172-144-232.internet.lu
31.172.145.170	PTR	170.145.172.31.adsl.internet.lu
31.172.145.200	PTR	200.145.172.31.adsl.internet.lu
31.172.146.0	PTR	0.146.172.31.adsl.internet.lu
31.172.146.80	PTR	catv-vdl-31-172-146-80.internet.lu
31.172.146.103	A	gatineau.lu
31.172.146.103	A	mail.gatineau.lu
31.172.146.130	A+PTR	catv-vdl-31-172-146-130.internet.lu
31.172.147.0	PTR	0.147.172.31.adsl.internet.lu
31.172.147.4	A	master.arnoldkontz.lu
31.172.147.4	A	mail.arnoldkontz.lu
31.172.147.30	A	de-sere.net
31.172.147.94	A	mail.clc.lu
31.172.147.128	PTR	128.147.172.31.adsl.internet.lu
31.172.147.203	A+PTR	catv-vdl-31-172-147-203.internet.lu
31.172.148.0	PTR	0.148.172.31.adsl.internet.lu
31.172.148.54	A	catv-bettembourg-31-172-148-54.internet.lu
31.172.148.128	PTR	128.148.172.31.adsl.internet.lu
31.172.148.130	PTR	130.148.172.31.adsl.internet.lu
31.172.149.0	PTR	0.149.172.31.adsl.internet.lu
31.172.149.128	PTR	128.149.172.31.adsl.internet.lu
31.172.149.207	A	catv-cents-31-172-149-207.internet.lu
31.172.150.0	PTR	0.150.172.31.adsl.internet.lu
31.172.150.241	PTR	catv-sanem-31-172-150-241.internet.lu
31.172.150.241	A	soundliners.com
31.172.150.241	A	mail.soundliners.com
31.172.151.139	PTR	catv-sanem-31-172-151-139.internet.lu