Autonomous system
AS36375 UMICH-AS-5
Unclassified ARIN
Summary
University of Michigan
education research university
The AS handle UMICH-AS-5 is held by University of Michigan.
What it's used for
- The address space carries university infrastructure, evidenced by reverse DNS entries such as
v-mwireless-sebdn.umnet.umich.edu,v-iot-lsadn.umnet.umich.edu, andnur191dhcp254.nursing.umich.edu. - The AS announces 826496 IPv4 addresses and 16 IPv6 prefixes across 26 IPv4 prefixes, while maintaining only 3 observed neighbours, a ratio indicative of an access or eyeball network rather than a transit provider.
Notable
- Registrants for the largest prefixes include University of Michigan, The Regents of the University of Michigan, and Merit Network Inc., with netnames like
UMICH-1,UMNET-6, andMICH-1. - The address inventory is heavily subdivided, particularly within the 141.212.0.0/16 block, which is split into numerous smaller prefixes ranging from /17 to /24.
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 2026-10-21, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 26 prefixes · 826K addresses IPv6 16 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 42 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS36375- Registry name
- UMICH-AS-5
- Registrant
- University of Michigan
- Abuse contact
- report-abuse@umich.edu
- Registered
- 2005-12-16
- Last changed
- 2012-03-02
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 100% valid · 21 valid, 0 with no ROA
- ROAs
- 24 authorising AS36375
- ASPA
- no ASPA record
- IRR
- 100% registered · 21 of 21 announcements
- Route objects
- 22 naming AS36375
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