asn.dev

Autonomous system

AS56508 ARDC

Unclassified RIPE

IPv4 addresses 65.28K 30 prefixes
IPv6 prefixes 2 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 1 1 downstream
Flagged prefixes 0 none

Summary

Amateur Radio Digital Communications

United States of America · AI-generated

amateur packet digital non-profit

ARDC is operated by Amateur Radio Digital Communications.

What it's used for

  • The address space carries the AMPRNet (Network 44), a digital packet radio network for amateur radio communications, as indicated by the AMPRNET netname on all registered prefixes.
  • The AS announces 65,280 IPv4 addresses across 23 prefixes and 2 IPv6 prefixes, while maintaining only 2 observed routing neighbours, a ratio consistent with a dedicated access network for a specific community rather than a transit provider.
  • Traffic consists of digital packet radio and data communications between amateur radio operators, facilitated by ARDC's role as a private foundation supporting amateur radio and digital communication.

Notable

  • All registrants for the announced prefixes are listed as Amateur Radio Digital Communications, matching the AS holder.
  • The address inventory is finely subdivided into 23 IPv4 prefixes within the 44.27.0.0/16 block, reflecting the segmented nature of the amateur radio network infrastructure.

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

1 upstream, 1 downstream and 2 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS20473The Constant Company, LLC1,760

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-18, 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 30 prefixes · 65.28K addresses IPv6 2 prefixes

CountryNamePrefixes
USUnited States of America32

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS56508
Registry name
ARDC
Registrant
lir-uk-comgw-1-MNT
Abuse contact
abuse@ardc.net
Registered
2023-07-24
Last changed
2023-07-24
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 30 with no ROA
ROAs
0 authorising AS56508
ASPA
no ASPA record
IRR
100% registered · 30 of 30 announcements
Route objects
19 naming AS56508

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: 443 networks and 1,784 prefixes, as published 2026-10-19. 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