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 v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
Network profile
Source: PeeringDB →Present at 7 internet exchanges: Equinix Tokyo, RIX (RYUKYUIX): RYUKYUIX-001, JPNAP Tokyo: Peering, JPIX TOKYO, BBIX Osaka, BBIX Tokyo, Japan Community IX
AS55900 — global IP footprint
Cities where AS55900 has measurable IPv4 allocation. Click any dot to open that city's page. Size and color scale with IP count.
Top CIDR ranges
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS55900 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 |
|---|---|---|
| 27.0.31.0/24 | 3,728 | 2026-07-21 13:51:38 |
| 180.131.208.0/20 | 3,614 | 2026-07-21 11:53:20 |
| 218.223.132.0/22 | 3,605 | 2026-07-21 11:53:20 |
| 218.223.128.0/21 | 3,604 | 2026-07-21 11:53:20 |
| 123.100.156.0/22 | 3,570 | 2026-07-21 13:54:23 |
| 123.100.136.0/22 | 3,569 | 2026-07-21 13:54:23 |
| 103.7.88.0/22 | 3,519 | 2026-07-21 13:53:42 |
| 103.250.92.0/24 | 3,435 | 2026-07-21 13:22:00 |
| 103.250.93.0/24 | 3,426 | 2026-07-21 13:22:00 |
| 180.131.210.0/24 | 3,284 | 2026-07-21 10:51:06 |
| 27.0.16.0/20 | 3,196 | 2026-07-21 13:51:38 |
| 103.13.248.0/22 | 3,155 | 2026-07-21 13:53:42 |
| 137.220.16.0/20 | 3,143 | 2026-07-21 13:54:23 |
| 180.131.240.0/20 | 3,102 | 2026-07-21 10:51:06 |
| 43.248.160.0/22 | 3,101 | 2026-07-21 13:52:09 |
| 180.131.224.0/20 | 3,096 | 2026-07-21 10:51:06 |
| 203.23.200.0/22 | 3,084 | 2026-07-21 10:51:06 |
| 109.236.0.0/20 | 3,077 | 2026-07-21 13:53:42 |
| 202.171.224.0/21 | 3,074 | 2026-07-21 10:51:06 |
| 103.250.92.0/22 | 3,064 | 2026-07-21 13:53:42 |
| 198.144.128.0/20 | 3,050 | 2026-07-21 10:51:06 |
| 103.100.189.0/24 | 3,036 | 2026-07-21 13:53:42 |
| 202.12.244.0/22 | 3,035 | 2026-07-21 10:51:06 |
| 218.223.128.0/22 | 3,025 | 2026-07-21 10:51:06 |
| 103.100.190.0/23 | 3,018 | 2026-07-21 13:53:42 |
| 202.171.224.0/22 | 666 | 2026-07-21 10:00:28 |
| 202.12.246.0/24 | 666 | 2026-07-21 10:00:28 |
Frequently Asked Questions
What is AS55900?
AS55900 is an Autonomous System Number assigned to GLBB Japan KK. 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 AS55900 announce?
AS55900 announces 41.7K IPv4 addresses distributed across 18 routed CIDR prefixes. The network is registered in Japan.
Who operates AS55900?
AS55900 is operated by GLBB Japan KK. The organization is based in Japan. You can view all IP ranges and related ASNs on the organization page.
What country is AS55900 registered in?
AS55900 is registered in Japan. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
