AS23790 JCOM Co., Ltd.

KCN-TV - JCOM Co., Ltd. · registered in Japan

IPv4 addresses18,4322 prefixes · <0.001% of announced IPv4

Rank in Japan#264largest network in JP by IPv4 space, of 724 · 0.01% of JP

Rank worldwide#6,454of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryJapan745 ASNs registered there

Open AS23790 in ASN lookup Look up an IP in this network (119.161.112.1) All networks in Japan

IPv4 prefixes

All 2 prefixes, in address order.

119.161.112.0/21
202.157.0.0/18

Other ASNs named JCOM Co., Ltd.

10 other networks use the same organisation name; together with AS23790 they announce 6,733,824 IPv4 addresses.

ASNNameIPv4 addresses

AS9824JTCL-JP-AS - JCOM Co., Ltd. JP4,745,216

AS9617ZAQ - JCOM Co., Ltd. JP1,163,264

AS4721JCN - JCOM Co., Ltd. JP631,808

AS9378CABLENET - JCOM Co., Ltd. JP45,056

AS18136CTA - JCOM Co., Ltd. JP43,008

AS18134KITANET - JCOM Co., Ltd. JP29,696

AS23788HICT - JCOM Co., Ltd. JP24,576

AS24276ICNET - JCOM Co., Ltd. JP20,480

AS7686ATNETHOME - JCOM Co., Ltd. JP8,192

AS45675KMN-TOKYO - JCOM Co., Ltd. JP4,096

Similar-sized networks in Japan

ASNNameIPv4 addresses

AS24271#261 iCTV - Iruma CATV co.18,432

AS24277#262 NIRAI - Okinawa Cable Network Inc.18,432

AS23784#263 POLEXCHENGE - SQUARE ENIX CO., LTD.18,432

AS24251#265 ICNTV-NET - Iwakuni Cable Network Corporation18,432

AS55381#266 CCSNET - CITY-CABLE SHUNAN Corporation17,920

AS131952#267 POTATO-NET - Asahikawa Cable Television Co., Ltd.17,920

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