AS55900 — GLBB-JP

Basic Information

Country

🇯🇵 Japan

Category

Hosting

Network Role

Mid-size Transit

Data Origin

Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)

Last Changed

March 04, 2026

Last Seen

March 04, 2026

Prefix Summary

IPv4 Prefixes (raw / aggregated)

27 / 18

IPv6 Prefixes (raw / aggregated)

1 / 1

IPv4 Addresses

41 728

Largest IPv4 Prefix

/19 (8 192 addresses)

Largest IPv6 Prefix

/32

Geolocated Countries

🇯🇵 JP (31 IPs)

Prefix Changed

March 04, 2026

Reputation

Reputation

Good — 1 flagged IPs out of 41 728 total (0.00%)

Connectivity Summary

Upstream Providers

4 upstream autonomous systems providing transit

Peers

13 autonomous systems exchanging traffic without transit fees

Downstream Customers

8 downstream autonomous systems buying transit

Degree

25 unique BGP neighbors (providers + customers + peers)

Reach

223 — customer cone size measuring network influence

Degree Rank

#6 329

Reach Rank

#811

Country Rank

#10

Upstream Providers (4)

• AS3356 — LEVEL3 (Tier-1 transit)
• AS1299 — TWELVE99 (Tier-1 transit)
• AS2914 — NTT-DATA-2914 (Tier-1 transit)
• AS2497 — IIJ

Prefix Lists

IPv4 Prefixes (27 total)

• 180.131.224.0/19 (8 192 addresses)
• 27.0.16.0/20 (4 096 addresses)
• 109.236.0.0/20 (4 096 addresses)
• 137.220.16.0/20 (4 096 addresses)
• 180.131.208.0/20 (4 096 addresses)
• 198.144.128.0/20 (4 096 addresses)
• 202.171.224.0/21 (2 048 addresses)
• 218.223.128.0/21 (2 048 addresses)
• 43.248.160.0/22 (1 024 addresses)
• 103.7.88.0/22 (1 024 addresses)
• 103.13.248.0/22 (1 024 addresses)
• 103.250.92.0/22 (1 024 addresses)
• 123.100.136.0/22 (1 024 addresses)
• 123.100.156.0/22 (1 024 addresses)
• 202.12.244.0/22 (1 024 addresses)
• 203.23.200.0/22 (1 024 addresses)
• 103.100.190.0/23 (512 addresses)
• 103.100.189.0/24 (256 addresses)

IPv6 Prefixes (1 total)

• 2404:2d00::/32