Robtex

Up: 79.139.80.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 79.139.84.0/23
Down right: 79.139.86.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
79.139.84.120	PTR	mail.dilmah.pl
79.139.85.6	PTR	poczta.obligo.pl
79.139.85.19	PTR	dns1.fpt-prima.com.pl
79.139.85.20	PTR	dns2.fpt-prima.com.pl
79.139.85.21	PTR	www.fpt-prima.com.pl
79.139.85.21	A	fpt-prima.com
79.139.85.22	A+PTR	mail3.fpt-prima.com.pl
79.139.85.23	A+PTR	mail2.fpt-prima.com.pl
79.139.85.27	PTR	test1.fpt-prima.com.pl
79.139.85.60	PTR	mail.pleuropa.pl
79.139.85.60	A	mail.thebetter.me
79.139.85.227	PTR	invigo.pl
79.139.85.228	PTR	evangelist.pl
79.139.85.229	PTR	evangelist.pl
79.139.85.241	PTR	mail.invigo.pl
79.139.85.241	PTR	mx.invigo.pl
79.139.86.136	A	aesthetic-medicine.pl
79.139.87.37	A+PTR	fbsd.pl
79.139.87.37	A	nosfar.fbsd.pl
79.139.87.37	A	shoy.fbsd.pl
79.139.87.49	A	hyp-p-49.pabianice.msk.pl
79.139.87.59	A	hyp-p-59.pabianice.msk.pl