AS9621 Okinawa Telecommunication Network Co.,Inc

II-OKINAWA - Okinawa Telecommunication Network Co.,Inc · registered in Japan

IPv4 addresses76,80014 prefixes · 0.002% of announced IPv4

Rank in Japan#87largest network in JP by IPv4 space, of 724 · 0.05% of JP

Rank worldwide#2,251of 79,396 networks with IPv4

IPv61 x /32 (65,536 x /48)1 prefixes

CountryJapan745 ASNs registered there

Open AS9621 in ASN lookup Look up an IP in this network (61.210.64.1) All networks in Japan

IPv4 prefixes

All 14 prefixes, in address order.

61.210.64.0/19
119.59.88.0/21
123.108.192.0/21
125.2.0.0/19
125.2.224.0/19
125.3.96.0/19
157.70.224.0/20
157.120.64.0/19
157.120.96.0/20
175.179.96.0/19
202.81.8.0/21
203.209.184.0/22
211.120.224.0/20
218.40.160.0/19

IPv6 prefixes

All 1 prefix.

2001:d28::/32

Similar-sized networks in Japan

ASNNameIPv4 addresses

AS9622#84 KCT - Kurashiki Cable TV78,848

AS18260#85 e-catv - EHIME CATV CO.,LTD.78,592

AS38628#86 WINK-NET - HIMEJI CABLE TELEVISION CORPORATION77,824

AS2505#88 HEPNET-J - High Energy Accelerator Research Organization, KEK74,240

AS10000#89 NCM - Nagasaki Cable Media Inc.73,728

AS58647#90 KAGAWAU-AS - Kagawa University73,728

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources