Robtex

Up: 87.121.0.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 87.121.0.0/23
Down right: 87.121.2.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
87.121.0.44	A+PTR	speedtest.neterra.net
87.121.0.44	A	sp1.neterra.net
87.121.0.45	PTR	87.121.0.45.neterra.net
87.121.0.80	A	ideaconsult.net
87.121.0.81	PTR	87.121.0.81.neterra.net
87.121.0.81	A	ns1.ideaconsult.net
87.121.0.82	PTR	87.121.0.82.neterra.net
87.121.0.82	A	ns2.ideaconsult.net
87.121.0.102	PTR	87.121.0.102.neterra.net
87.121.0.102	A	apartamenti.com
87.121.0.103	A	xn--80adilbac8acjucdtk.com
87.121.0.103	A	perdeta.net
87.121.0.103	A	aptekavarna.com
87.121.0.105	A	turquoisehometextile.com
87.121.0.105	A	megamashini.com
87.121.0.105	A	pokrivki.com
87.121.0.107	PTR	87.121.0.107.neterra.net
87.121.0.110	PTR	87.121.0.110.neterra.net
87.121.0.110	A	apartamentisofia.com
87.121.0.112	A	2oor.com
87.121.0.114	PTR	87.121.0.114.neterra.net
87.121.0.114	A	megavrati.com
87.121.0.114	A	lechenieto.com
87.121.0.165	PTR	87.121.0.165.neterra.net
87.121.0.165	A	bul.torguardvpnaccess.com
87.121.0.180	A	ns3.verax.net
87.121.0.181	A+PTR	ns4.verax.net
87.121.0.182	A+PTR	smtp.email.bg
87.121.0.198	PTR	87.121.0.198.neterra.net
87.121.0.198	A	pokeroffers.org
87.121.0.199	PTR	87.121.0.199.neterra.net
87.121.0.199	A	www.grinders.org
87.121.0.200	A+PTR	mail.healthydesk.bg
87.121.0.200	A	ns1.grindupdate.com
87.121.0.200	A	ns2.grindupdate.com
87.121.0.235	A	game-station.biz
87.121.2.152	PTR	886c2c3.broachile.com
87.121.2.152	A	furstruggarsod.com
87.121.2.172	PTR	f4e08b8.broachile.com
87.121.2.172	A	logwaretroyalt.com
87.121.2.178	PTR	9586d55.broachile.com
87.121.2.178	A	webtradgamiren.com
87.121.3.1	A	87-121-3-1-gw.telecablenet.com
87.121.3.2	A+PTR	87-121-3-2.telecablenet.com
87.121.3.7	PTR	87-121-3-7.telecablenet.com
87.121.3.8	A	87-121-3-8.telecablenet.com
87.121.3.10	A	87-121-3-10.telecablenet.com
87.121.3.11	A	87-121-3-11.telecablenet.com
87.121.3.17	A	87-121-3-17.telecablenet.com
87.121.3.23	A	87-121-3-23.telecablenet.com
87.121.3.32	A+PTR	87-121-3-32.telecablenet.com
87.121.3.38	A	87-121-3-38.telecablenet.com
87.121.3.41	A	87-121-3-41.telecablenet.com
87.121.3.51	A	87-121-3-51.telecablenet.com
87.121.3.54	A+PTR	87-121-3-54.telecablenet.com
87.121.3.61	A	87-121-3-61.telecablenet.com
87.121.3.79	A	87-121-3-79.telecablenet.com
87.121.3.96	A+PTR	87-121-3-96.telecablenet.com
87.121.3.110	A+PTR	87-121-3-110.telecablenet.com
87.121.3.112	A+PTR	87-121-3-112.telecablenet.com
87.121.3.116	A	87-121-3-116.telecablenet.com
87.121.3.124	A+PTR	87-121-3-124.telecablenet.com
87.121.3.132	A+PTR	87-121-3-132.telecablenet.com
87.121.3.149	A+PTR	87-121-3-149.telecablenet.com
87.121.3.162	A	87-121-3-162.telecablenet.com
87.121.3.171	A	87-121-3-171.telecablenet.com
87.121.3.174	A	87-121-3-174.telecablenet.com
87.121.3.177	A	87-121-3-177.telecablenet.com
87.121.3.181	A+PTR	87-121-3-181.telecablenet.com
87.121.3.190	A+PTR	87-121-3-190.telecablenet.com
87.121.3.203	A	87-121-3-203.telecablenet.com
87.121.3.245	A+PTR	87-121-3-245.telecablenet.com
87.121.3.246	A	87-121-3-246.telecablenet.com