AS55900 — GLBB-JP - GLBB Japan KK

AS55900 announces 22 IPv4 prefixes covering 52,992 addresses and 1 IPv6 prefixes.

About this network

GLBB-JP is operated by GLBB Japan KK.

What it's used for

• The address space carries netnames such as GLBB-NET, GLBB-UP1, GLBB-UP2, GLBB-UP4, GLBB-UP6, and ATCC-YOKOTA, with reverse DNS entries pointing to jptransit.net and glbb.ne.jp.
• The AS announces 52,992 IPv4 addresses across 29 prefixes and 1 IPv6 prefix, while maintaining 24 observed neighbours, a ratio consistent with an access or eyeball network serving end-users.
• Traffic from this AS consists of subscriber eyeballs and business users, as GLBB Japan provides communication platforms for individuals and businesses.

Notable

• Registrants for the largest prefixes are listed as Japan Network Information Center (JPNIC) with IRT-JPNIC-JP, which is standard for Japanese address space allocation, while the AS holder is GLBB Japan KK.
• The address inventory includes a mix of /20, /21, /22, /23, and /24 prefixes, with the largest block being 180.131.224.0/19.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 27.0.16.0/20
• 43.248.160.0/22
• 103.7.88.0/22
• 103.13.248.0/22
• 103.100.189.0/24
• 103.100.190.0/23
• 103.250.92.0/22
• 104.222.192.0/20
• 104.222.208.0/21
• 104.222.216.0/22
• 109.236.0.0/20
• 123.100.136.0/22
• 123.100.156.0/22
• 137.220.16.0/20
• 172.97.80.0/20
• 180.131.208.0/20
• 180.131.224.0/19
• 198.144.128.0/20
• 202.12.244.0/22
• 202.171.224.0/21
• 203.23.200.0/22
• 218.223.128.0/21
• 2404:2d00::/32

Upstream networks

• AS1299 Arelion Sweden AB
• AS2497 Internet Initiative Japan Inc.
• AS3356 Level 3 Parent, LLC
• AS6939 Hurricane Electric LLC
• AS2914 NTT America, Inc.
• AS9002 RETN Limited
• AS24482 SG.GS
• AS35280 F5 Networks SARL

Downstream networks

• AS135607 Infinivan Incorporated
• AS63774 Kamoike.net LLP
• AS24277 Okinawa Cable Network Inc.
• AS131951 Suzuyo Shinwart Corporation
• AS45679 Tatsumi, Tomo
• AS55899 irob Ltd.
• AS146986 SUZUYO SHINWART CORPORATION
• AS63800 SERVER-G Group

Adjacent networks

• AS135607 Infinivan Incorporated
• AS1299 Arelion Sweden AB
• AS2914 NTT America, Inc.
• AS2497 Internet Initiative Japan Inc.
• AS146986 SUZUYO SHINWART CORPORATION
• AS6939 Hurricane Electric LLC
• AS3356 Level 3 Parent, LLC
• AS63774 Kamoike.net LLP
• AS24277 Okinawa Cable Network Inc.
• AS131951 Suzuyo Shinwart Corporation
• AS45679 Tatsumi, Tomo
• AS24482 SG.GS
• AS9002 RETN Limited
• AS55899 irob Ltd.
• AS63800 SERVER-G Group
• AS35280 F5 Networks SARL

Routing security

• RPKI: 32 valid, 0 invalid and 0 not-found announcements; 25 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 85 route objects.
• Listed in as-sets: AS-ANY2-RS, AS-GLBB-TRANSIT, AS-IIJ, AS-IIJ6, AS-OCN, AS-OCN, AS-OCN-V6, AS-OCN-V6, AS-SET-136769, AS137912:AS-CUSTOMERS, AS2497:AS-IIJ, AS2497:AS-IIJ6.

Internet exchanges

• BroadBand Internet eXchange Tokyo — Tokyo, Japan
• JPIX Tokyo — Tokyo, Japan
• BroadBand Internet eXchange Osaka — Osaka, Japan
• Equinix Internet Exchange Tokyo — Tokyo, Japan