$ query “AS55900” --type=asn → 1 result(s)

AS55900 — GLBB-JP

GLBB Japan KK

AS55900 is a mid-size transit provider registered to GLBB Japan KK, established in Japan. The network announces a respectable 41 728 IPv4 addresses. Supports IPv6.

  • #10 in Japan — Top 10 by reach within country

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