AS18123 INAOKI EDUCATIONAL INSTITUTION

SEIRYO - INAOKI EDUCATIONAL INSTITUTION · registered in Japan

IPv4 addresses1,5362 prefixes · <0.001% of announced IPv4

Rank in Japan#498largest network in JP by IPv4 space, of 724 · <0.01% of JP

Rank worldwide#26,264of 79,396 networks with IPv4

IPv61 x /481 prefixes

CountryJapan745 ASNs registered there

Open AS18123 in ASN lookup Look up an IP in this network (202.236.76.1) All networks in Japan

IPv4 prefixes

All 2 prefixes, in address order.

202.236.76.0/22
202.244.84.0/23

IPv6 prefixes

All 1 prefix.

2001:df0:2e4::/48

Similar-sized networks in Japan

ASNNameIPv4 addresses

AS24257#495 JPIX-64ES - Japan Internet Xing Co., Ltd.1,536

AS63805#496 RIDC-NET - Ryobi Systems Co., Ltd.1,536

AS141757#497 ZJC-AS-AP - Zoho Japan Corporation1,536

AS18258#499 MS-JP-AS-AP - Morgan Stanley Japan Limited1,536

AS24280#500 HIS-TKIDC - Hitachi Systems, Ltd.1,536

AS131904#501 CYBERFEELINC-JP - Cyber Feel Inc.1,536

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