Autonomous system
AS9 CMU-ROUTER
Unclassified ARIN
Summary
Carnegie Mellon University
education university research legacy
One of the oldest allocations on the internet (CMU-ROUTER), serving Carnegie Mellon University in Pittsburgh, Pennsylvania.
What it's used for
- Campus, research, and administrative networking for the university.
Notable
- A single-digit AS number reflects how early CMU connected, handed out sequentially in the internet's first years.
Interesting
- CMU has deep roots in computing and networking research, including the early Andrew system and a long line of internet-related work.
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 2026-10-18, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 9 prefixes · 134K addresses IPv6 16 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 25 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS9- Registry name
- CMU-ROUTER
- Registrant
- Carnegie Mellon University
- Abuse contact
- abuse@andrew.cmu.edu
- Registered
- 1984-04-17
- Last changed
- 2012-04-02
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 10% valid · 1 valid, 9 with no ROA
- ROAs
- 5 authorising AS9
- ASPA
- no ASPA record
- IRR
- 100% registered · 10 of 10 announcements
- Route objects
- 20 naming AS9
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