AS9607 — BBTOWER BroadBand Tower, Inc.

Network type: hosting

AS9607 announces 17 IPv4 prefixes covering 31,744 addresses and 2 IPv6 prefixes.

About this network

AS9607 (BBTOWER) is held by BroadBand Tower, Inc., a Japanese data-centre and cloud operator. The company runs carrier-neutral colocation facilities in central Tokyo and in Umeda, Osaka, and sells colocation, hosting, managed services and storage to media, gaming and telecoms customers.

What it's used for

The reverse DNS reads like a data-centre inventory rather than an ISP's subscriber pool. Sampled addresses resolve to names such as ethernet1-2.bbfw-01.colo03.bbtower.ne.jp, user.ge-0-0-43.aggr0502.colo05.bbtower.ad.jp and user.ge-0-0-0.medge0901.colo01.bbtower.ad.jp: firewall and aggregation-router interfaces tagged with the site they live in (colo01, colo03, colo05), with user. marking the customer-facing side of the port. Others fall back to the dotted-quad form 208x111x48x5.bbtower.ad.jp. The address footprint fits: 19 IPv4 prefixes for only 31,232 addresses, heavily fragmented into /21s, /22s, /23s and /24s, which is what colocation space looks like when it is carved up per tenant rather than handed out as access pools. The 28 observed BGP neighbours are consistent with a facility operator that peers at Japanese exchanges and buys multiple upstreams to give tenants carrier choice, without itself being a transit carrier.

Notable

• 208.111.48.0/21 is an ARIN-region block sitting inside an otherwise APNIC-region footprint, and it is announced with bbtower.ad.jp PTRs like the rest.
• The naming convention colo0N in the PTRs directly exposes which of the company's sites a given address is homed to.
• Three IPv6 blocks are announced, including 2001:370::/32 and 2404:c700::/32.

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

Announced prefixes

• 103.96.112.0/22
• 124.147.0.0/19
• 202.183.80.0/21
• 203.141.48.0/22
• 203.141.52.0/23
• 203.141.55.0/24
• 203.141.56.0/21
• 203.216.192.0/19
• 208.111.48.0/21
• 210.231.208.0/22
• 211.14.0.0/21
• 211.14.9.0/24
• 211.14.10.0/23
• 211.14.16.0/22
• 211.14.24.0/23
• 211.14.30.0/23
• 218.231.252.0/23
• 2001:370::/32
• 2404:c700::/32

Upstream networks

• AS2497 Internet Initiative Japan Inc.
• AS4637 Telstra Global
• AS8220 COLT Technology Services Group Limited
• AS6939 Hurricane Electric LLC
• AS8966 EMIRATES TELECOMMUNICATIONS GROUP COMPANY (ETISALAT GROUP) PJSC
• AS7473 Singapore Telecommunications Ltd

Downstream networks

• AS7511 SYNAPSE Co.,Ltd.
• AS7671 NTT SmartConnect Corporation
• AS63774 Kamoike.net LLP
• AS7505 Fujitsu Systems Applications & Support Limited
• AS131896 SSI Lab Inc.
• AS18260 EHIME CATV CO.,LTD.
• AS146981 Nekojarashi Inc.
• AS7530 BroadBand Tower, Inc.
• AS24277 Okinawa Cable Network Inc.
• AS9601 Niigata Communication Service
• AS63790 CyberAgent, Inc.
• AS146976 Kvision Co.,Ltd.
• AS55898 LY Corporation
• AS146974 Woven by Toyota, Inc.
• AS150369 TelHi Corporation
• AS63780 dual&Co. Inc.

Adjacent networks

• AS8220 COLT Technology Services Group Limited
• AS4637 Telstra Global
• AS2497 Internet Initiative Japan Inc.
• AS7511 SYNAPSE Co.,Ltd.
• AS7671 NTT SmartConnect Corporation
• AS63774 Kamoike.net LLP
• AS131896 SSI Lab Inc.
• AS6939 Hurricane Electric LLC
• AS63780 dual&Co. Inc.
• AS7505 Fujitsu Systems Applications & Support Limited
• AS150369 TelHi Corporation
• AS7530 BroadBand Tower, Inc.
• AS18260 EHIME CATV CO.,LTD.
• AS146981 Nekojarashi Inc.
• AS24277 Okinawa Cable Network Inc.
• AS9601 Niigata Communication Service
• AS63790 CyberAgent, Inc.
• AS146976 Kvision Co.,Ltd.
• AS55898 LY Corporation
• AS146974 Woven by Toyota, Inc.
• AS8966 EMIRATES TELECOMMUNICATIONS GROUP COMPANY (ETISALAT GROUP) PJSC
• AS7473 Singapore Telecommunications Ltd

Internet exchanges

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