asn.dev

Autonomous system

AS38074 SDCC-AS-AP SDCC Japan-West Area

Unclassified APNIC

IPv4 addresses 768 3 prefixes
IPv6 prefixes 15 counted as prefixes, not addresses
Countries 1 mostly JP
Exchanges 0 recorded by PCH
Upstreams 3 14 downstream
Flagged prefixes 0 none

Summary

SDCC OpenNetwork

Japan · AI-generated

educational research amateur radio

SDCC-AS-AP is operated by SDCC OpenNetwork, a Japanese educational and research network.

What it's used for

  • The address space carries amateur radio digital communications and research traffic, evidenced by the AMPRNET netname and sdconw.com reverse DNS entries.
  • The AS announces 768 IPv4 addresses and 15 IPv6 prefixes, maintaining 21 peering neighbours, a ratio consistent with a specialized research or educational network rather than a large-scale transit provider.
  • Traffic consists of data for amateur radio experimentation, digital communications testing, and academic research projects hosted within the Shimane Data Center Club infrastructure.

Notable

  • Registrants align with the announcer, including Amateur Radio Digital Communications for the 44.31.25.0/24 block and Shimane Data Center Club Administrator for the 103.152.178.0/24 and 103.160.48.0/24 blocks.
  • The inventory includes a US-based prefix (44.31.25.0/24) alongside Japanese allocations, reflecting the international nature of amateur radio networks and the specific allocation for AMPRNET.

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

No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.

Transit providers

3 upstream, 14 downstream and 23 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS150363SoftEther Corporation215
AS59103SoftEther Corporation22
AS63798Industrial Cyber Security Center of Excellence18

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-14, 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 3 prefixes · 768 addresses IPv6 15 prefixes

CountryNamePrefixes
JPJapan18

Registry

Allocation record

APNIC · via Atlas (registry + RDAP)
Registry
APNIC
Handle
AS38074
Registry name
SDCC-AS-AP
Registrant
Ayao Takata
Abuse contact
contact@m.sdconw.com
Registered
2021-02-04
Last changed
2023-06-02
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
80% valid · 4 valid, 1 with no ROA
ROAs
9 authorising AS38074
ASPA
no ASPA record
IRR
80% registered · 4 of 5 announcements
Route objects
8 naming AS38074

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: 442 networks and 1,771 prefixes, as published 2026-10-15. 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