AS131921
GMO GlobalSign Holdings K.K.
Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
- Baseline (neutral) 65
- Trust score 65 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Network profile
Source: PeeringDB →Present at 1 internet exchange: BBIX Tokyo
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 153.122.0.0/16 | 65.5K |
46.1%
|
GMO GlobalSign Holdings K.K. | JP | Tokyo | Tokyo |
| 153.123.0.0/20 | 4.1K |
7.0%
|
GMO GlobalSign Holdings K.K. | JP | — | — |
| 153.124.128.0/20 | 4.1K |
0.1%
|
GMO GlobalSign Holdings K.K. | JP | — | — |
| 180.222.176.0/20 | 4.1K |
25.6%
|
GMO GlobalSign Holdings K.K. | JP | — | — |
| 210.158.32.0/20 | 4.1K |
96.0%
|
GMO GlobalSign Holdings K.K. | JP | — | — |
| 133.117.152.0/21 | 2.0K |
49.5%
|
GMO GlobalSign Holdings K.K. | JP | — | — |
| 153.123.16.0/21 | 2.0K |
0.0%
|
GMO GlobalSign Holdings K.K. | JP | — | — |
| 153.124.144.0/21 | 2.0K |
0.0%
|
GMO GlobalSign Holdings K.K. | JP | — | — |
| 180.131.136.0/21 | 2.0K |
56.5%
|
GMO GlobalSign Holdings K.K. | JP | — | — |
| 133.117.148.0/22 | 1.0K |
96.8%
|
GMO GlobalSign Holdings K.K. | JP | — | — |
| 133.117.160.0/22 | 1.0K |
0.0%
|
GMO GlobalSign Holdings K.K. | JP | — | — |
| 202.237.148.0/23 | 512 |
90.6%
|
GMO GlobalSign Holdings K.K. | JP | — | — |
| 157.120.115.0/24 | 256 |
21.5%
|
GMO GlobalSign Holdings K.K. | JP | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS131921 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.
| Prefix | Announcement samples | Last seen |
|---|---|---|
| 133.117.152.0/22 | 12,716 | 2026-09-12 13:03:42 |
| 133.117.156.0/22 | 12,701 | 2026-09-12 13:03:42 |
| 133.117.150.0/23 | 12,682 | 2026-09-12 13:03:42 |
| 133.117.148.0/23 | 12,669 | 2026-09-12 13:03:42 |
| 180.222.176.0/21 | 12,541 | 2026-09-12 13:03:42 |
| 153.122.224.0/20 | 12,539 | 2026-09-12 13:03:42 |
| 153.124.128.0/24 | 12,534 | 2026-09-12 13:03:42 |
| 153.122.208.0/20 | 12,526 | 2026-09-12 13:03:42 |
| 180.131.136.0/22 | 12,509 | 2026-09-12 13:03:42 |
| 153.122.240.0/20 | 12,505 | 2026-09-12 13:03:42 |
| 153.124.132.0/24 | 12,503 | 2026-09-12 13:03:42 |
| 180.222.184.0/21 | 12,499 | 2026-09-12 13:03:42 |
| 153.122.16.0/20 | 12,497 | 2026-09-12 13:03:42 |
| 153.122.176.0/20 | 12,482 | 2026-09-12 13:03:42 |
| 153.122.48.0/20 | 12,469 | 2026-09-12 13:03:42 |
| 153.122.112.0/20 | 12,465 | 2026-09-12 13:03:42 |
| 180.131.140.0/22 | 12,462 | 2026-09-12 13:03:42 |
| 153.122.192.0/20 | 12,456 | 2026-09-12 13:03:42 |
| 153.122.160.0/20 | 12,456 | 2026-09-12 13:03:42 |
| 153.122.144.0/20 | 12,440 | 2026-09-12 13:03:42 |
| 153.122.32.0/20 | 12,433 | 2026-09-12 13:03:42 |
| 153.122.128.0/20 | 12,426 | 2026-09-12 13:03:42 |
| 153.122.80.0/20 | 12,424 | 2026-09-12 13:03:42 |
| 153.122.0.0/20 | 12,420 | 2026-09-12 13:03:42 |
| 153.124.128.0/23 | 12,418 | 2026-09-12 13:03:42 |
| 153.122.64.0/20 | 12,404 | 2026-09-12 13:03:42 |
| 153.122.96.0/20 | 12,392 | 2026-09-12 13:03:42 |
| 210.158.40.0/21 | 12,342 | 2026-09-12 13:03:42 |
| 210.158.32.0/21 | 12,305 | 2026-09-12 13:03:42 |
| 202.237.148.0/24 | 12,244 | 2026-09-12 13:03:42 |
| 153.123.20.0/22 | 11,631 | 2026-09-12 13:03:42 |
| 153.123.16.0/22 | 11,597 | 2026-09-12 13:03:42 |
| 133.117.152.0/21 | 9,811 | 2026-09-12 13:03:42 |
| 153.123.0.0/20 | 9,777 | 2026-09-12 13:03:42 |
| 153.124.128.0/20 | 9,773 | 2026-09-12 13:03:42 |
| 133.117.148.0/22 | 9,750 | 2026-09-12 13:03:42 |
| 180.222.176.0/20 | 9,696 | 2026-09-12 13:03:42 |
| 180.131.136.0/21 | 9,651 | 2026-09-12 13:03:42 |
| 202.237.149.0/24 | 9,402 | 2026-09-12 13:03:42 |
| 202.237.148.0/23 | 9,372 | 2026-09-12 13:03:42 |
| 210.158.32.0/20 | 9,366 | 2026-09-12 13:03:42 |
| 157.120.115.0/24 | 9,144 | 2026-09-12 13:03:42 |
| 153.123.2.0/24 | 9,143 | 2026-09-12 13:03:42 |
| 153.123.3.0/24 | 9,104 | 2026-09-12 13:03:42 |
| 153.123.6.0/23 | 9,103 | 2026-09-12 13:03:42 |
| 153.122.0.0/16 | 9,069 | 2026-09-12 13:03:42 |
| 153.123.4.0/23 | 9,067 | 2026-09-12 13:03:42 |
| 153.123.8.0/23 | 9,061 | 2026-09-12 13:03:42 |
| 153.123.0.0/24 | 8,267 | 2026-09-12 13:03:42 |
| 153.124.144.0/21 | 6,849 | 2026-09-12 13:03:42 |
Showing top 50 of 55 announced prefixes by sample volume.
Frequently Asked Questions
What is AS131921?
AS131921 is an Autonomous System Number assigned to GMO GlobalSign Holdings K.K.. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).
How many IP addresses does AS131921 announce?
AS131921 announces 92.9K IPv4 addresses distributed across 13 routed CIDR prefixes. The network is registered in Japan.
Who operates AS131921?
AS131921 is operated by GMO GlobalSign Holdings K.K.. The organization is based in Japan. You can view all IP ranges and related ASNs on the organization page.
What country is AS131921 registered in?
AS131921 is registered in Japan. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
