Robtex

Up: 81.228.32.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 81.228.48.0/21
Down right: 81.228.56.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.228.49.8	A+PTR	81-228-49-8-no529.tbcn.telia.com
81.228.49.8	A	swlstal.dyndns.org
81.228.49.53	PTR	81-228-49-53-no194.ipt.telia.com
81.228.51.36	A	armstar.com
81.228.51.163	A+PTR	81-228-51-163-no61.tbcn.telia.com
81.228.51.163	A	smtp.norhager.com
81.228.52.6	A	cloudpilot.se
81.228.52.20	A+PTR	81-228-52-20-no105.tbcn.telia.com
81.228.52.196	A+PTR	81-228-52-196-no105.tbcn.telia.com
81.228.52.196	A	stigson.se
81.228.53.110	A+PTR	81-228-53-110-no105.tbcn.telia.com
81.228.53.179	PTR	h179n5-s-oev-a31.ias.bredband.telia.com
81.228.53.179	A	lyckostigen.se
81.228.53.179	A	mail.lyckostigen.se
81.228.53.205	PTR	81-228-53-205-no105.tbcn.telia.com
81.228.53.205	A	kuriren34.dyndns-ip.com
81.228.53.205	A	mail2.gaxi.com
81.228.54.151	A	81-228-54-151-no98.tbcn.telia.com
81.228.54.151	A	81-228-54-151-no2205.digitaltv.telia.com
81.228.54.171	A	81-228-54-171-no98.tbcn.telia.com
81.228.54.178	A+PTR	81-228-54-178-no98.tbcn.telia.com
81.228.54.221	A	81-228-54-221-no98.tbcn.telia.com
81.228.54.239	A	81-228-54-239-no98.tbcn.telia.com
81.228.54.241	A+PTR	81-228-54-241-no98.tbcn.telia.com
81.228.55.82	A	mail.jonathandahlin.se
81.228.55.82	A	jonathandahlin.se
81.228.55.179	A	hem.dynamic-dns.net
81.228.55.251	A+PTR	h251n6-g-kt-d2.ias.bredband.telia.com
81.228.56.99	PTR	h99n2-hlm-d2.ias.bredband.telia.com
81.228.56.126	PTR	81-228-56-126-no2663.tbcn.telia.com
81.228.57.12	A+PTR	81-228-57-12-no34.tbcn.telia.com
81.228.57.37	A	mail.rednaxela.se
81.228.57.37	A	mail2.rednaxela.se
81.228.57.37	A	*.rednaxela.se
81.228.57.55	A+PTR	81-228-57-55-no34.tbcn.telia.com
81.228.57.161	PTR	h161n12-m-rg-a13.ias.bredband.telia.com
81.228.57.161	A	*.gagol.pl
81.228.57.161	A	gharn.eu
81.228.57.174	PTR	81-228-57-174-no34.tbcn.telia.com
81.228.57.179	A+PTR	81-228-57-179-no34.tbcn.telia.com
81.228.57.199	A+PTR	81-228-57-199-no34.tbcn.telia.com
81.228.57.229	A+PTR	81-228-57-229-no34.tbcn.telia.com
81.228.58.2	A+PTR	81-228-58-2-no232.tbcn.telia.com
81.228.58.6	A	81-228-58-6-no232.tbcn.telia.com
81.228.58.7	A	81-228-58-7-no232.tbcn.telia.com
81.228.58.17	A+PTR	81-228-58-17-no232.tbcn.telia.com
81.228.58.18	A+PTR	81-228-58-18-no232.tbcn.telia.com
81.228.58.32	A+PTR	h32n2-g-bn-a11.ias.bredband.telia.com
81.228.58.36	A	81-228-58-36-no232.tbcn.telia.com
81.228.58.37	A	81-228-58-37-no232.tbcn.telia.com
81.228.58.40	A	81-228-58-40-no232.tbcn.telia.com
81.228.58.48	A+PTR	81-228-58-48-no232.tbcn.telia.com
81.228.58.52	A	81-228-58-52-no232.tbcn.telia.com
81.228.58.60	A	81-228-58-60-no232.tbcn.telia.com
81.228.58.63	A	81-228-58-63-no232.tbcn.telia.com
81.228.58.65	A+PTR	81-228-58-65-no232.tbcn.telia.com
81.228.58.67	A+PTR	81-228-58-67-no232.tbcn.telia.com
81.228.58.68	A	81-228-58-68-no232.tbcn.telia.com
81.228.58.76	A	81-228-58-76-no232.tbcn.telia.com
81.228.58.92	A	81-228-58-92-no232.tbcn.telia.com
81.228.58.93	A	81-228-58-93-no232.tbcn.telia.com
81.228.58.95	A	81-228-58-95-no232.tbcn.telia.com
81.228.58.98	A+PTR	81-228-58-98-no232.tbcn.telia.com
81.228.58.99	A+PTR	81-228-58-99-no232.tbcn.telia.com
81.228.58.106	A	81-228-58-106-no232.tbcn.telia.com
81.228.58.108	A	81-228-58-108-no232.tbcn.telia.com
81.228.58.117	A	81-228-58-117-no232.tbcn.telia.com
81.228.58.118	A	81-228-58-118-no232.tbcn.telia.com
81.228.58.120	A	81-228-58-120-no232.tbcn.telia.com
81.228.58.123	A	81-228-58-123-no232.tbcn.telia.com
81.228.58.128	A+PTR	81-228-58-128-no232.tbcn.telia.com
81.228.58.129	A+PTR	81-228-58-129-no232.tbcn.telia.com
81.228.58.136	A	81-228-58-136-no232.tbcn.telia.com
81.228.58.140	A	81-228-58-140-no232.tbcn.telia.com
81.228.58.146	A+PTR	81-228-58-146-no232.tbcn.telia.com
81.228.58.147	A+PTR	81-228-58-147-no232.tbcn.telia.com
81.228.58.151	A	81-228-58-151-no232.tbcn.telia.com
81.228.58.152	A	81-228-58-152-no232.tbcn.telia.com
81.228.58.160	A+PTR	81-228-58-160-no232.tbcn.telia.com
81.228.58.161	A+PTR	81-228-58-161-no232.tbcn.telia.com
81.228.58.166	A	81-228-58-166-no232.tbcn.telia.com
81.228.58.168	A	81-228-58-168-no232.tbcn.telia.com
81.228.58.176	A+PTR	81-228-58-176-no232.tbcn.telia.com
81.228.58.186	A	81-228-58-186-no232.tbcn.telia.com
81.228.58.190	A	81-228-58-190-no232.tbcn.telia.com
81.228.58.191	A	81-228-58-191-no232.tbcn.telia.com
81.228.58.200	A	81-228-58-200-no232.tbcn.telia.com
81.228.58.204	A	81-228-58-204-no232.tbcn.telia.com
81.228.58.205	A	81-228-58-205-no232.tbcn.telia.com
81.228.58.207	A	81-228-58-207-no232.tbcn.telia.com
81.228.58.209	A+PTR	81-228-58-209-no232.tbcn.telia.com
81.228.58.214	A	81-228-58-214-no232.tbcn.telia.com
81.228.58.220	A	81-228-58-220-no232.tbcn.telia.com
81.228.58.221	A	81-228-58-221-no232.tbcn.telia.com
81.228.58.229	A	81-228-58-229-no232.tbcn.telia.com
81.228.58.234	A	81-228-58-234-no232.tbcn.telia.com
81.228.58.237	A	81-228-58-237-no232.tbcn.telia.com
81.228.58.246	A	81-228-58-246-no232.tbcn.telia.com
81.228.59.21	A	kontoret.homeip.net
81.228.59.34	A+PTR	h34n8-hlb2-a11.ias.bredband.telia.com
81.228.59.34	A	asbro.org
81.228.59.178	A+PTR	h178n8-hlb2-a11.ias.bredband.telia.com
81.228.59.222	A+PTR	h222n8-hlb2-a11.ias.bredband.telia.com
81.228.59.233	A+PTR	h233n8-hlb2-a11.ias.bredband.telia.com
81.228.60.187	A	kdlv.se
81.228.61.13	A	h13n27-ud-a14.ias.bredband.telia.com
81.228.61.95	A	81-228-61-95-no112.tbcn.telia.com
81.228.62.104	A	mediax4free.com
81.228.62.213	A+PTR	81-228-62-213-no232.tbcn.telia.com
81.228.62.213	A	r-pi.mine.nu
81.228.62.213	A	dennford.com
81.228.62.251	A+PTR	81-228-62-251-no232.tbcn.telia.com