Autonomous system
AS27274 CMICH
Unclassified ARIN
Summary
Central Michigan University
education university residential business
CMICH is the autonomous system for Central Michigan University.
What it's used for
- The address space carries university network traffic, evidenced by netnames
MICH-7464,CMICH-NET, andCMU-NET1, all registered to Central Michigan University. - The system announces 139264 IPv4 addresses and 16 IPv6 prefixes with only 1 observed neighbour, a ratio that indicates an access or eyeball network rather than a transit provider.
Notable
- All RDAP registrants for the largest prefixes agree with the announcer, consistently listing Central Michigan University.
- The inventory consists of three IPv4 prefixes, including the large 35.32.0.0/16 block and 141.209.0.0/16, alongside a finely subdivided IPv6 estate under 2607:ff30::/36.
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.
Transit providers
1 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS237 | Merit Network Inc. | 219 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-21, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 3 prefixes · 139K addresses IPv6 16 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 19 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS27274- Registry name
- CMICH
- Registrant
- Central Michigan University
- Abuse contact
- abuse@cmich.edu
- Registered
- 2003-02-05
- Last changed
- 2012-03-02
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 50% valid · 2 valid, 2 with no ROA
- ROAs
- 2 authorising AS27274
- ASPA
- no ASPA record
- IRR
- 100% registered · 4 of 4 announcements
- Route objects
- 6 naming AS27274
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 1,779 prefixes, as published 2026-10-22. 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