Robtex

Up: 81.23.0.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 81.23.16.0/21
Down right: 81.23.24.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.23.16.1	A+PTR	sip.kyivstar.ua
81.23.16.2	A+PTR	wces.kyivstar.ua
81.23.16.3	A+PTR	aves.kyivstar.ua
81.23.16.4	A	sip.kyivstar.ua
81.23.16.6	A	smsrelay.kyivstar.net
81.23.16.12	A	wces.kyivstar.ua
81.23.16.13	A	aves.kyivstar.ua
81.23.16.36	A+PTR	siebelemail.kyivstar.ua
81.23.16.36	A	proxy.kyivstar.net
81.23.16.37	PTR	asa-vpn.kyivstar.net
81.23.16.39	A	proxy.kyivstar.net
81.23.16.42	A	retdb-comm.kyivstar.ua
81.23.16.48	A+PTR	mx2.kyivstar.net
81.23.16.48	A	coca.i.kyivstar.net
81.23.16.54	A	proxy.kyivstar.net
81.23.16.55	A	proxy.kyivstar.net
81.23.20.12	A	r1.sn-3tp8nu5g-qo3e.googlevideo.com
81.23.20.12	A	r1.sn-3tp8nu5g-qo3e.gvt1.com
81.23.20.13	A	r2.sn-3tp8nu5g-qo3e.gvt1.com
81.23.20.14	A	r3.sn-3tp8nu5g-qo3e.gvt1.com
81.23.20.16	PTR	81-23-20-16-vpn.gprs.kyivstar.net
81.23.20.16	A	r5.sn-3tp8nu5g-qo3e.gvt1.com
81.23.20.16	A	r5---sn-3tp8nu5g-qo3e.googlevideo.com
81.23.20.17	PTR	81-23-20-17-vpn.gprs.kyivstar.net
81.23.20.17	A	r6.sn-3tp8nu5g-qo3e.googlevideo.com
81.23.20.17	A	r6---sn-3tp8nu5g-qo3e.googlevideo.com
81.23.20.45	A	r2---sn-3tp8nu5g-qo3l.googlevideo.com
81.23.20.46	A	r3.sn-3tp8nu5g-qo3l.gvt1.com
81.23.20.46	A	r3.sn-3tp8nu5g-qo3l.googlevideo.com
81.23.20.46	A	r3---sn-3tp8nu5g-qo3l.googlevideo.com
81.23.20.48	PTR	81-23-20-48-vpn.gprs.kyivstar.net
81.23.20.48	A	r5.sn-3tp8nu5g-qo3l.googlevideo.com
81.23.20.48	A	r5.sn-3tp8nu5g-qo3l.gvt1.com
81.23.20.49	A	r6---sn-3tp8nu5g-qo3l.googlevideo.com
81.23.20.49	A	r6.sn-3tp8nu5g-qo3l.gvt1.com
81.23.20.76	A	r1.sn-3tp8nu5g-afve.gvt1.com
81.23.20.76	A	r1.sn-3tp8nu5g-afve.googlevideo.com
81.23.20.76	A	r1---sn-3tp8nu5g-afve.googlevideo.com
81.23.20.77	A	r2.sn-3tp8nu5g-afve.gvt1.com
81.23.20.80	A	r5.sn-3tp8nu5g-afve.gvt1.com
81.23.20.80	A	r5.sn-3tp8nu5g-afve.googlevideo.com
81.23.20.81	A	r6.sn-3tp8nu5g-afve.googlevideo.com
81.23.20.81	A	r6.sn-3tp8nu5g-afve.gvt1.com
81.23.20.108	A	r1.sn-3tp8nu5g-afvl.gvt1.com
81.23.20.108	A	r1---sn-3tp8nu5g-afvl.googlevideo.com
81.23.20.109	A	r2.sn-3tp8nu5g-afvl.gvt1.com
81.23.20.110	A	r3---sn-3tp8nu5g-afvl.googlevideo.com
81.23.20.112	A	r5.sn-3tp8nu5g-afvl.googlevideo.com
81.23.20.113	A	r6.sn-3tp8nu5g-afvl.gvt1.com
81.23.20.113	A	r6.sn-3tp8nu5g-afvl.googlevideo.com
81.23.20.140	A	r1.sn-3tp8nu5g-vqne.googlevideo.com
81.23.20.140	A	r1.sn-3tp8nu5g-vqne.gvt1.com
81.23.20.141	A	r2.sn-3tp8nu5g-vqne.googlevideo.com
81.23.20.172	A	r1.sn-3tp8nu5g-vqnl.gvt1.com
81.23.20.172	A	r1.sn-3tp8nu5g-vqnl.googlevideo.com
81.23.20.173	A	r2.sn-3tp8nu5g-vqnl.gvt1.com
81.23.20.173	A	r2.sn-3tp8nu5g-vqnl.googlevideo.com
81.23.20.204	A	r1.sn-3tp8nu5g-ig3e.gvt1.com
81.23.20.204	A	r1.sn-3tp8nu5g-ig3e.googlevideo.com
81.23.20.205	A	r2.sn-3tp8nu5g-ig3e.gvt1.com
81.23.20.206	A	r3.sn-3tp8nu5g-ig3e.googlevideo.com
81.23.20.237	A	r2.sn-3tp8nu5g-ig3l.googlevideo.com
81.23.20.237	A	r2.sn-3tp8nu5g-ig3l.gvt1.com
81.23.20.238	A	r3.sn-3tp8nu5g-ig3l.googlevideo.com
81.23.20.238	A	r3.sn-3tp8nu5g-ig3l.gvt1.com
81.23.22.0	PTR	81-23-22-0.ip.kyivstar.net
81.23.22.17	A+PTR	mail.citia.co.uk
81.23.22.18	PTR	81-23-22-18.ip.kyivstar.net
81.23.22.82	PTR	ns.smn.com.ua
81.23.23.108	A	r1.sn-3tp8nu5g-3c26.gvt1.com
81.23.23.108	A	r1.sn-3tp8nu5g-3c26.googlevideo.com
81.23.23.109	A	r2.sn-3tp8nu5g-3c26.gvt1.com
81.23.23.109	A	r2.sn-3tp8nu5g-3c26.googlevideo.com
81.23.23.112	A	r5.sn-3tp8nu5g-3c26.googlevideo.com
81.23.23.113	A	r6.sn-3tp8nu5g-3c26.googlevideo.com
81.23.23.131	A+PTR	smtprelay.kyivstar.ua
81.23.23.132	A	st.kyivstar.net
81.23.23.204	A	r1.sn-3tp8nu5g-3c2d.googlevideo.com
81.23.23.204	A	r1.sn-3tp8nu5g-3c2d.gvt1.com
81.23.23.205	A	r2.sn-3tp8nu5g-3c2d.googlevideo.com
81.23.23.205	A	r2.sn-3tp8nu5g-3c2d.gvt1.com
81.23.23.208	A	r5.sn-3tp8nu5g-3c2d.googlevideo.com
81.23.23.209	A	r6.sn-3tp8nu5g-3c2d.googlevideo.com
81.23.23.209	A	r6.sn-3tp8nu5g-3c2d.gvt1.com
81.23.23.225	PTR	golf.hostmaster.net.ua
81.23.24.0	PTR	81-23-24-0-nat.gprs.kyivstar.net
81.23.24.49	PTR	81-23-24-49-nat.gprs.kyivstar.net
81.23.24.114	PTR	81-23-24-114-nat.gprs.kyivstar.net
81.23.24.129	PTR	81-23-24-129-nat.gprs.kyivstar.net
81.23.24.193	A	st-gbps.kyivstar.net
81.23.24.208	PTR	81-23-24-208-nat.gprs.kyivstar.net
81.23.25.12	A	r1---sn-3tp8nu5g-3c2e.googlevideo.com
81.23.25.12	A	r1.sn-3tp8nu5g-3c2e.googlevideo.com
81.23.25.12	A	r1.sn-3tp8nu5g-3c2e.gvt1.com
81.23.25.13	A	r2.sn-3tp8nu5g-3c2e.gvt1.com
81.23.25.16	PTR	81-23-25-16-vpn.gprs.kyivstar.net
81.23.25.16	A	r5---sn-3tp8nu5g-3c2e.googlevideo.com
81.23.25.16	A	r5.sn-3tp8nu5g-3c2e.googlevideo.com
81.23.25.17	PTR	81-23-25-17-vpn.gprs.kyivstar.net
81.23.25.17	A	r6---sn-3tp8nu5g-3c2e.googlevideo.com
81.23.25.76	A	r1---sn-3tp8nu5g-3c2l.googlevideo.com
81.23.25.76	A	r1.sn-3tp8nu5g-3c2l.gvt1.com
81.23.25.77	A	r2---sn-3tp8nu5g-3c2l.googlevideo.com
81.23.25.77	A	r2.sn-3tp8nu5g-3c2l.gvt1.com
81.23.25.80	PTR	81-23-25-80-vpn.gprs.kyivstar.net
81.23.25.80	A	r5---sn-3tp8nu5g-3c2l.googlevideo.com
81.23.25.80	A	r5.sn-3tp8nu5g-3c2l.googlevideo.com
81.23.25.81	A	r6---sn-3tp8nu5g-3c2l.googlevideo.com
81.23.25.140	A	r1---sn-3tp8nu5g-3c2s.googlevideo.com
81.23.25.140	A	r1.sn-3tp8nu5g-3c2s.gvt1.com
81.23.25.140	A	r1.sn-3tp8nu5g-3c2s.googlevideo.com
81.23.25.141	A	r2---sn-3tp8nu5g-3c2s.googlevideo.com
81.23.25.144	PTR	81-23-25-144-vpn.gprs.kyivstar.net
81.23.25.144	A	r5---sn-3tp8nu5g-3c2s.googlevideo.com
81.23.25.145	PTR	81-23-25-145-vpn.gprs.kyivstar.net
81.23.25.145	A	r6---sn-3tp8nu5g-3c2s.googlevideo.com
81.23.25.145	A	r6.sn-3tp8nu5g-3c2s.gvt1.com
81.23.25.204	A	r1---sn-3tp8nu5g-3c2z.googlevideo.com
81.23.25.204	A	r1.sn-3tp8nu5g-3c2z.gvt1.com
81.23.25.205	A	r2---sn-3tp8nu5g-3c2z.googlevideo.com
81.23.25.205	A	r2.sn-3tp8nu5g-3c2z.gvt1.com
81.23.25.208	PTR	81-23-25-208-vpn.gprs.kyivstar.net
81.23.25.208	A	r5.sn-3tp8nu5g-3c2z.gvt1.com
81.23.25.208	A	r5---sn-3tp8nu5g-3c2z.googlevideo.com
81.23.25.209	PTR	81-23-25-209-vpn.gprs.kyivstar.net
81.23.25.209	A	r6---sn-3tp8nu5g-3c2z.googlevideo.com
81.23.28.12	A	r1.sn-3tp8nu5g-afvs.googlevideo.com
81.23.28.12	A	r1.sn-3tp8nu5g-afvs.gvt1.com
81.23.28.13	A	r2.sn-3tp8nu5g-afvs.googlevideo.com
81.23.28.13	A	r2.sn-3tp8nu5g-afvs.gvt1.com
81.23.28.32	PTR	81-23-28-32-vpn.gprs.kyivstar.net
81.23.28.44	A	r1.sn-3tp8nu5g-afvz.gvt1.com
81.23.28.44	A	r1.sn-3tp8nu5g-afvz.googlevideo.com
81.23.28.45	A	r2.sn-3tp8nu5g-afvz.gvt1.com
81.23.28.76	A	r1.sn-3tp8nu5g-3fbe.gvt1.com
81.23.28.76	A	r1.sn-3tp8nu5g-3fbe.googlevideo.com
81.23.28.77	A	r2.sn-3tp8nu5g-3fbe.gvt1.com
81.23.28.77	A	r2.sn-3tp8nu5g-3fbe.googlevideo.com
81.23.28.108	A	r1.sn-3tp8nu5g-3fbl.gvt1.com
81.23.28.108	A	r1.sn-3tp8nu5g-3fbl.googlevideo.com
81.23.28.109	A	r2.sn-3tp8nu5g-3fbl.googlevideo.com
81.23.28.109	A	r2.sn-3tp8nu5g-3fbl.gvt1.com
81.23.28.204	A	r1.sn-3tp8nu5g-v1ie.gvt1.com
81.23.28.204	A	r1.sn-3tp8nu5g-v1ie.googlevideo.com
81.23.28.205	A	r2.sn-3tp8nu5g-v1ie.googlevideo.com
81.23.28.205	A	r2.sn-3tp8nu5g-v1ie.gvt1.com
81.23.28.236	A	r1.sn-3tp8nu5g-v1il.googlevideo.com
81.23.28.236	A	r1.sn-3tp8nu5g-v1il.gvt1.com
81.23.28.237	A	r2.sn-3tp8nu5g-v1il.gvt1.com
81.23.28.237	A	r2.sn-3tp8nu5g-v1il.googlevideo.com
81.23.29.97	PTR	81-23-29-97-vpn.gprs.kyivstar.net
81.23.29.98	PTR	81-23-29-98-vpn.gprs.kyivstar.net
81.23.29.145	PTR	81-23-29-145-vpn.gprs.kyivstar.net
81.23.29.192	PTR	81-23-29-192-vpn.gprs.kyivstar.net
81.23.29.208	PTR	81-23-29-208-vpn.gprs.kyivstar.net
81.23.30.0	PTR	81-23-30-0-vpn.gprs.kyivstar.net
81.23.30.19	PTR	81-23-30-19-vpn.gprs.kyivstar.net
81.23.30.32	PTR	81-23-30-32-vpn.gprs.kyivstar.net
81.23.30.34	PTR	81-23-30-34-vpn.gprs.kyivstar.net
81.23.30.64	PTR	81-23-30-64-vpn.gprs.kyivstar.net
81.23.30.80	PTR	81-23-30-80-vpn.gprs.kyivstar.net
81.23.30.81	PTR	81-23-30-81-vpn.gprs.kyivstar.net
81.23.30.114	PTR	81-23-30-114-vpn.gprs.kyivstar.net
81.23.30.131	PTR	81-23-30-131-vpn.gprs.kyivstar.net
81.23.30.144	PTR	81-23-30-144-vpn.gprs.kyivstar.net
81.23.30.146	PTR	81-23-30-146-vpn.gprs.kyivstar.net
81.23.30.161	PTR	81-23-30-161-vpn.gprs.kyivstar.net
81.23.30.176	PTR	81-23-30-176-vpn.gprs.kyivstar.net
81.23.30.177	PTR	81-23-30-177-vpn.gprs.kyivstar.net
81.23.30.192	PTR	81-23-30-192-vpn.gprs.kyivstar.net
81.23.30.195	PTR	81-23-30-195-vpn.gprs.kyivstar.net
81.23.30.226	PTR	81-23-30-226-vpn.gprs.kyivstar.net
81.23.30.227	PTR	81-23-30-227-vpn.gprs.kyivstar.net