AS131921 GMO GlobalSign Holdings K.K.

GMOCL - GMO GlobalSign Holdings K.K. · registered in Japan

IPv4 addresses92,92824 prefixes · 0.003% of announced IPv4

Rank in Japan#74largest network in JP by IPv4 space, of 724 · 0.06% of JP

Rank worldwide#1,975of 79,396 networks with IPv4

IPv61,025 x /484 prefixes

CountryJapan745 ASNs registered there

Open AS131921 in ASN lookup Look up an IP in this network (133.117.148.1) All networks in Japan

IPv4 prefixes

All 24 prefixes, in address order.

133.117.148.0/22
133.117.152.0/21
133.117.160.0/23
133.117.162.0/23
153.122.0.0/16
153.123.0.0/24
153.123.1.0/24
153.123.2.0/23
153.123.4.0/22
153.123.8.0/23
153.123.10.0/23
153.123.12.0/22
153.123.16.0/21
153.124.128.0/22
153.124.132.0/24
153.124.133.0/24
153.124.134.0/23
153.124.136.0/21
153.124.144.0/21
157.120.115.0/24
180.131.136.0/21
180.222.176.0/20
202.237.148.0/23
210.158.32.0/20

IPv6 prefixes

All 4 prefixes.

2406:a1c0:2::/48
2406:a1c0:100::/40
2406:a1c0:200::/39
2406:a1c0:400::/40

Other ASNs named GMO GlobalSign Holdings K.K.

1 other network uses the same organisation name; together with AS131921 they announce 93,696 IPv4 addresses.

ASNNameIPv4 addresses

AS146987GMOCL-NET - GMO GlobalSign Holdings K.K. JP768

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AS4678#75 FINE - Canon IT Solutions Inc.90,880

AS17707#76 DATAHOTEL-JP - AS for DATAHOTEL, which is one of iDC in Japan,90,368

AS9993#77 CTC-ODC - ITOCHU Techno-Solutions Corporation89,088

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