Robtex

Up: 213.21.32.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 213.21.48.0/21
Down right: 213.21.56.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
213.21.48.29	A	mail.galkin-vladimir.ru
213.21.48.35	PTR	35.48.21.213.at-home.ru
213.21.48.48	PTR	48.48.21.213.at-home.ru
213.21.48.50	PTR	50.48.21.213.at-home.ru
213.21.48.66	PTR	66.48.21.213.at-home.ru
213.21.48.96	PTR	96.48.21.213.at-home.ru
213.21.48.130	PTR	130.48.21.213.at-home.ru
213.21.48.144	PTR	144.48.21.213.at-home.ru
213.21.48.163	PTR	163.48.21.213.at-home.ru
213.21.48.178	PTR	178.48.21.213.at-home.ru
213.21.48.192	PTR	192.48.21.213.at-home.ru
213.21.48.195	PTR	195.48.21.213.at-home.ru
213.21.48.211	PTR	211.48.21.213.at-home.ru
213.21.48.241	PTR	241.48.21.213.at-home.ru
213.21.48.242	PTR	242.48.21.213.at-home.ru
213.21.49.218	PTR	218.49.21.213.at-home.ru
213.21.50.4	PTR	4.50.21.213.at-home.ru
213.21.50.80	PTR	80.50.21.213.at-home.ru
213.21.50.113	PTR	113.50.21.213.at-home.ru
213.21.50.162	PTR	162.50.21.213.at-home.ru
213.21.50.226	PTR	226.50.21.213.at-home.ru
213.21.51.129	PTR	129.51.21.213.at-home.ru
213.21.51.129	A	mymailer.ru
213.21.51.130	PTR	130.51.21.213.at-home.ru
213.21.51.130	A	mail.dnw.spb.ru
213.21.51.130	A	dnw.spb.ru
213.21.51.134	A+PTR	coolhazker.ru
213.21.52.2	PTR	2.52.21.213.at-home.ru
213.21.52.4	PTR	4.52.21.213.at-home.ru
213.21.52.49	PTR	49.52.21.213.at-home.ru
213.21.52.51	PTR	51.52.21.213.at-home.ru
213.21.52.66	PTR	66.52.21.213.at-home.ru
213.21.52.90	A	ustimenko.com
213.21.52.97	PTR	97.52.21.213.at-home.ru
213.21.52.99	PTR	99.52.21.213.at-home.ru
213.21.52.112	PTR	112.52.21.213.at-home.ru
213.21.52.115	PTR	115.52.21.213.at-home.ru
213.21.52.128	PTR	128.52.21.213.at-home.ru
213.21.52.130	PTR	130.52.21.213.at-home.ru
213.21.52.131	PTR	131.52.21.213.at-home.ru
213.21.52.162	PTR	162.52.21.213.at-home.ru
213.21.52.163	PTR	163.52.21.213.at-home.ru
213.21.52.176	PTR	176.52.21.213.at-home.ru
213.21.52.182	A	brick.com.ru
213.21.52.193	PTR	193.52.21.213.at-home.ru
213.21.52.194	PTR	194.52.21.213.at-home.ru
213.21.52.209	PTR	209.52.21.213.at-home.ru
213.21.52.240	PTR	240.52.21.213.at-home.ru
213.21.52.242	PTR	242.52.21.213.at-home.ru
213.21.53.2	PTR	2.53.21.213.at-home.ru
213.21.53.55	PTR	55.53.21.213.at-home.ru
213.21.53.55	A	www.azga.ru
213.21.53.135	A+PTR	mail.alee.ru
213.21.53.135	A	pechkin.alee.com
213.21.53.141	PTR	141.53.21.213.at-home.ru
213.21.53.141	A	guimachine.ru
213.21.53.141	A	scandocs.ru
213.21.53.179	PTR	179.53.21.213.at-home.ru
213.21.54.158	PTR	158.54.21.213.at-home.ru
213.21.54.158	A	mail.svergun.net
213.21.54.158	A	svergun.net
213.21.55.84	A	mail.autocampiglio.com
213.21.55.195	PTR	195.55.21.213.at-home.ru
213.21.56.68	PTR	68.56.21.213.at-home.ru
213.21.56.68	A	gui-machine.ru
213.21.56.68	A	gui-machine.com
213.21.56.70	PTR	70.56.21.213.at-home.ru
213.21.57.5	PTR	5.57.21.213.at-home.ru
213.21.57.5	A	www.baltgaz.ru
213.21.58.32	PTR	32.58.21.213.at-home.ru
213.21.58.48	PTR	48.58.21.213.at-home.ru
213.21.58.49	PTR	49.58.21.213.at-home.ru
213.21.58.98	PTR	98.58.21.213.at-home.ru
213.21.58.112	PTR	112.58.21.213.at-home.ru
213.21.58.129	PTR	129.58.21.213.at-home.ru
213.21.58.161	PTR	161.58.21.213.at-home.ru
213.21.58.162	PTR	162.58.21.213.at-home.ru
213.21.58.163	PTR	163.58.21.213.at-home.ru
213.21.58.176	PTR	176.58.21.213.at-home.ru
213.21.58.192	PTR	192.58.21.213.at-home.ru
213.21.58.195	PTR	195.58.21.213.at-home.ru
213.21.58.211	PTR	211.58.21.213.at-home.ru
213.21.58.240	PTR	240.58.21.213.at-home.ru
213.21.58.243	PTR	243.58.21.213.at-home.ru
213.21.59.58	PTR	58.59.21.213.at-home.ru
213.21.60.91	PTR	91.60.21.213.at-home.ru
213.21.61.16	PTR	16.61.21.213.at-home.ru
213.21.61.17	PTR	17.61.21.213.at-home.ru
213.21.61.33	PTR	33.61.21.213.at-home.ru
213.21.61.34	PTR	34.61.21.213.at-home.ru
213.21.61.35	PTR	35.61.21.213.at-home.ru
213.21.61.81	PTR	81.61.21.213.at-home.ru
213.21.61.83	PTR	83.61.21.213.at-home.ru
213.21.61.112	PTR	112.61.21.213.at-home.ru
213.21.61.114	PTR	114.61.21.213.at-home.ru
213.21.61.128	PTR	128.61.21.213.at-home.ru
213.21.61.162	PTR	162.61.21.213.at-home.ru
213.21.61.176	PTR	176.61.21.213.at-home.ru
213.21.61.194	PTR	194.61.21.213.at-home.ru
213.21.61.208	PTR	208.61.21.213.at-home.ru
213.21.62.46	PTR	46.62.21.213.at-home.ru
213.21.63.1	PTR	1.63.21.213.at-home.ru
213.21.63.4	PTR	4.63.21.213.at-home.ru
213.21.63.17	PTR	17.63.21.213.at-home.ru
213.21.63.34	PTR	34.63.21.213.at-home.ru
213.21.63.35	PTR	35.63.21.213.at-home.ru
213.21.63.49	PTR	49.63.21.213.at-home.ru
213.21.63.65	PTR	65.63.21.213.at-home.ru
213.21.63.80	PTR	80.63.21.213.at-home.ru
213.21.63.114	PTR	114.63.21.213.at-home.ru
213.21.63.144	PTR	144.63.21.213.at-home.ru
213.21.63.147	PTR	147.63.21.213.at-home.ru
213.21.63.194	PTR	194.63.21.213.at-home.ru
213.21.63.208	PTR	208.63.21.213.at-home.ru