asn.dev

Autonomous system

AS7505 MEDIAWEB Fujitsu Systems Applications & Support Limited

Unclassified APNIC

IPv4 addresses 21.50K 4 prefixes
IPv6 prefixes 1 counted as prefixes, not addresses
Countries 1 mostly JP
Exchanges 1 recorded by PCH
Upstreams 6 0 downstream
Flagged prefixes 0 none

Summary

Fsas Technologies (Fujitsu group)

Japan · AI-generated

enterprise legacy

MEDIAWEB — the network of Fujitsu Systems Applications & Support Limited (FSAS, now Fsas Technologies), the Fujitsu group's IT infrastructure and support company.

What it's used for

  • Fujitsu group network and hosting infrastructure. The registry records tie its blocks to Fujitsu rather than to any consumer brand: 202.226.192.0/19 is registered to FSAS itself under the netname ISP-NET01, and 203.139.128.0/20 is a Fujitsu Limited block still carrying the InfoWeb netname from Fujitsu's 1990s consumer ISP.
  • Legacy regional-ISP space: 202.216.96.0/19 resolves under ia-net.ad.jp and infoaomori.ne.jp — InfoAomori, Aomori Prefecture's first ISP, founded by a Fujitsu group engineering company in 1996 and wound down years ago.

Notable

  • Sparse rDNS is the finding. Only a handful of hosts in ~21k addresses resolve at all. This is not a busy eyeball or hosting network today; it looks like corporate and residual infrastructure held by the Fujitsu group.
  • Do not read the surviving ISP names as live consumer services. InfoWeb and InfoAomori are retired brands whose netnames outlived them, a common pattern in the RIR databases and a reliable way to get a card's kind wrong.

Interesting

  • Fujitsu's InfoWeb was one of the big early Japanese consumer ISPs before it was folded into @nifty; the block name is one of the last visible traces of it.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.

Interconnection

Peering at a glance

Full topology · Graph

Internet exchanges

Recorded at 1 exchange in 1 country, largest first.

ExchangeLocationTheir address
BroadBand Internet eXchange TokyoTokyo, Japan101.203.89.20

Transit providers

6 upstream, 0 downstream and 8 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS9607BroadBand Tower, Inc.219
AS6939Hurricane Electric LLC39
AS17676SoftBank Corp.7
AS24482SG.GS5
AS9304HGC Global Communications Limited4
AS9002RETN Limited1

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-28, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 4 prefixes · 21.50K addresses IPv6 1 prefixes

CountryNamePrefixes
JPJapan5

Registry

Allocation record

APNIC · via Atlas (registry + RDAP)
Registry
APNIC
Handle
AS7505
Registry name
MEDIAWEB
Registered
1997-03-03
Last changed
2016-05-31
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 5 with no ROA
ROAs
0 authorising AS7505
ASPA
no ASPA record
IRR
40% registered · 2 of 5 announcements
Route objects
2 naming AS7505

Reputation

Classification and threat

Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.

Spamhaus DROP

Not on ASN-DROP The network as a whole is not listed.

No DROP prefixes None of its announced space is on the DROP prefix list.

Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 448 networks and 1,851 prefixes, as published 2026-10-29. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.

FBI IC3

No IC3 indicators Nothing from the FBI IC3 feed.

IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.

Elsewhere

Cross-check