Autonomous system
AS25920 -Reserved AS-
Unclassified ARIN
Summary
Cogent Communications
transit telecom business
The AS handle is -Reserved AS- and the holder is Cogent Communications, LLC.
What it's used for
- The address space carries infrastructure for Cogent Communications, LLC, as indicated by the netname
COGENT-Aon the prefix38.86.74.0/23. - The inventory consists of 768 IPv4 addresses across 2 prefixes, with 2 observed neighbours, suggesting a transit or peering role rather than a large access network.
Notable
- Registrants include Cogent Communications, LLC for
38.86.74.0/23and Level 3 Parent, LLC for50.58.172.0/24, indicating a mix of owned and potentially leased or acquired space. - The address inventory is small and fragmented, with one prefix registered to Cogent and another to Level 3 Parent, LLC, reflecting historical consolidation or leasing arrangements.
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
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-07, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 1 prefixes · 512 addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| Unknown | 1 |
Registry
Allocation record
- Registry
- ARIN
- Allocation
- reserved
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 2 with no ROA
- ROAs
- 0 authorising AS25920
- ASPA
- no ASPA record
- IRR
- 0% registered · 0 of 2 announcements 1 other origin
- Route objects
- 0 naming AS25920
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: 454 networks and 1,852 prefixes, as published 2026-11-08. 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