Robtex

Up: 177.152.216.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 177.152.220.0/23
Down right: 177.152.222.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
177.152.220.7	A	mta08.dinamomta.com
177.152.220.17	A+PTR	mta02.conceitosmta.com
177.152.220.18	A+PTR	mta03.conceitosmta.com
177.152.220.19	A+PTR	mta04.conceitosmta.com
177.152.220.20	A+PTR	mta05.conceitosmta.com
177.152.220.21	A+PTR	mta06.conceitosmta.com
177.152.220.24	A	mta01.polomta.com
177.152.220.26	A	mta03.polomta.com
177.152.220.32	A+PTR	mta01.assizzling.com
177.152.220.32	A	mta01.apcdmta.com
177.152.220.39	A	mta08.apcdmta.com
177.152.220.41	A+PTR	mta02.ibsmta.com
177.152.220.47	A+PTR	mta08.ibsmta.com
177.152.220.50	A	mta03.itavemapost.com
177.152.220.55	A	mta08.itavemapost.com
177.152.220.56	A	mta09.itavemapost.com
177.152.220.61	A	mta14.itavemapost.com
177.152.220.169	A	mta42.etalentmta.com.br
177.152.220.181	A+PTR	mta54.etalentmta.com.br
177.152.221.20	PTR	mta05.pedradailhapost.com.br
177.152.221.33	A	mta02.esmpost.com
177.152.221.41	A+PTR	mta10.esmpost.com
177.152.221.68	A	mta05.asgrape.com
177.152.222.14	A+PTR	mta15.watechmta.com.br
177.152.222.65	A	mta02.dswpost.com
177.152.222.68	A	mta05.dswpost.com
177.152.222.72	A	mta09.dswpost.com
177.152.222.75	A	mta12.dswpost.com
177.152.222.76	A	mta13.dswpost.com
177.152.222.81	A+PTR	mta02.sorridentspost.com
177.152.222.84	A+PTR	mta05.sorridentspost.com
177.152.222.85	A+PTR	mta06.sorridentspost.com
177.152.222.87	A+PTR	mta08.sorridentspost.com
177.152.222.90	A+PTR	mta11.sorridentspost.com
177.152.222.95	A+PTR	mta16.sorridentspost.com
177.152.222.111	PTR	mta16.maxpresspost.com
177.152.222.111	A	mta04.acmtmta.com
177.152.223.0	A	mx.ibsmta.com
177.152.223.0	A	mx.itavemapost.com
177.152.223.0	A	mx.npitresmta.com
177.152.223.39	A	mta08.viajarbaratopostdois.com
177.152.223.42	A	mta11.viajarbaratopostdois.com