AS7530 — BBTOWER-LAB BroadBand Tower, Inc.

Network type: hosting

AS7530 announces 2 IPv4 prefixes covering 2,048 addresses and 1 IPv6 prefixes.

About this network

BBTOWER-LAB — a small network of BroadBand Tower, Inc., a Tokyo data-centre and cloud operator. The company was founded in 1999 as Global Center Japan, a name that survives in its address registrations (GCTR-CIDR-BLK-JP).

What it's used for

• BroadBand Tower's own infrastructure and lab/test networks — the -LAB in the handle matches the CSLAB-NET netname on part of the space, and the routers resolve as core1.as7530.bbtower.net.
• Hosting some shared service infrastructure, including FTP hosts published under the jpix.ad.jp domain of the JPIX exchange (AS7527).

Notable

• Tiny: about 2,048 IPv4 addresses across three prefixes. This is not where BroadBand Tower's commercial data-centre customers live, so don't read the company's size into this AS. Judge it by what it announces, not by the brand.
• rDNS is sparse, which is itself a signal: infrastructure and lab space, not populated customer hosting.

Interesting

• BroadBand Tower grew out of Japan's Internet Research Institute, one of the original backers of JPIX. The FTP hosts carrying a JPIX name in BroadBand Tower address space are a visible remnant of that shared history.

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

Announced prefixes

• 210.231.212.0/22
• 210.231.220.0/22
• 2405:f000::/32

Upstream networks

• AS9607 BroadBand Tower, Inc.
• AS6939 Hurricane Electric LLC
• AS17639 Converge ICT Solutions Inc.
• AS24482 SG.GS
• AS20485 Joint Stock Company TransTeleCom
• AS38001 NewMedia Express Pte Ltd
• AS8966 EMIRATES TELECOMMUNICATIONS GROUP COMPANY (ETISALAT GROUP) PJSC

Downstream networks

• AS150363 SoftEther Corporation

Adjacent networks

• AS9607 BroadBand Tower, Inc.
• AS150363 SoftEther Corporation
• AS6939 Hurricane Electric LLC
• AS2500 WIDE Project
• AS17639 Converge ICT Solutions Inc.
• AS24482 SG.GS
• AS20485 Joint Stock Company TransTeleCom
• AS38001 NewMedia Express Pte Ltd
• AS8966 EMIRATES TELECOMMUNICATIONS GROUP COMPANY (ETISALAT GROUP) PJSC

Internet exchanges

• BroadBand Internet eXchange Tokyo — Tokyo, Japan
• JPIX Tokyo — Tokyo, Japan
• Network Service Provider IXP (Distributed IX in Edo) — Tokyo, Japan