AS9824 JCOM Co., Ltd.

JTCL-JP-AS - JCOM Co., Ltd. · registered in Japan

IPv4 addresses4,745,21635 prefixes · 0.151% of announced IPv4

Rank in Japan#6largest network in JP by IPv4 space, of 724 · 2.94% of JP

Rank worldwide#101of 79,396 networks with IPv4

IPv69 x /32 (589,824 x /48)5 prefixes

CountryJapan745 ASNs registered there

Open AS9824 in ASN lookup Look up an IP in this network (27.136.0.1) All networks in Japan

IPv4 prefixes

All 35 prefixes, in address order.

27.136.0.0/13
42.144.0.0/13
59.166.0.0/16
59.168.0.0/14
60.58.0.0/15
60.60.0.0/15
60.62.0.0/16
61.21.0.0/16
61.22.0.0/15
61.24.0.0/14
110.128.0.0/13
116.64.0.0/15
116.214.16.0/21
116.220.0.0/14
119.168.0.0/16
119.169.0.0/17
119.169.128.0/18
119.169.192.0/18
119.170.0.0/15
119.172.0.0/18
119.172.64.0/18
119.172.128.0/17
119.173.0.0/16
119.174.0.0/17
119.174.128.0/18
119.174.192.0/18
119.175.0.0/16
124.140.0.0/14
124.144.0.0/15
125.8.0.0/13
203.165.0.0/16
210.20.0.0/16
210.194.0.0/16
220.152.0.0/18
220.152.64.0/19

IPv6 prefixes

All 5 prefixes.

2001:ff0::/32
2405:1200::/30
2405:1204::/31
2405:1206::/32
2405:1207::/32

Other ASNs named JCOM Co., Ltd.

10 other networks use the same organisation name; together with AS9824 they announce 6,733,824 IPv4 addresses.

ASNNameIPv4 addresses

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

AS23790KCN-TV - JCOM Co., Ltd. JP18,432

AS7686ATNETHOME - JCOM Co., Ltd. JP8,192

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

Similar-sized networks in Japan

ASNNameIPv4 addresses

AS2516#3 KDDI - KDDI CORPORATION18,072,320

AS2907#4 SINET-AS - Research Organization of Information and Systems, National Institute of Informatics8,765,504

AS17506#5 UCOM - ARTERIA Networks Corporation5,382,143

AS2497#7 IIJ - Internet Initiative Japan Inc.4,094,976

AS2527#8 So-net - Sony Network Communications Inc.3,867,648

AS2518#9 BIGLOBE - BIGLOBE Inc.3,670,016

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