Autonomous system
AS11745 USNH
Education ARIN
Summary
University System of New Hampshire
education university research legacy
USNH is the University System of New Hampshire, the public higher-education system that includes the University of New Hampshire in Durham, Plymouth State and Keene State. This is a campus and research network.
What it's used for
Academic, residential-campus and administrative connectivity across the system's institutions. RIS sees 2 IPv4 prefixes, 73,728 addresses, 1 IPv6 prefix, and 6 observed neighbours.
The interesting number is the address count against the prefix count. 132.177.0.0/16 is a full classful-era /16, announced whole, and it accounts for almost the entire footprint. Universities that got onto the internet early hold blocks that a company of comparable headcount could never obtain today, and they tend to announce them intact rather than carving them up — there is no traffic-engineering reason to deaggregate when you have exactly one network to reach. The /16 registers to the University System of New Hampshire, and the sampled PTR mercury.unh.edu confirms first-party use.
Notable
The second prefix, 64.72.0.0/19, registers not to USNH but to the Community College System of New Hampshire. That is a separate legal entity, and it is precisely the kind of registrant mismatch that can look like leased space at a glance. It is not. It is a state higher-education system announcing a sibling state institution's block — a shared-infrastructure arrangement between two public systems in the same state, which is the ordinary way research and education networking is organised regionally.
Interesting
IPv6 is present as 2606:4100::/32, so USNH is dual-stacked, which puts it ahead of a number of comparably sized public universities that still announce v4 only.
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 2026-10-19, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 2 prefixes · 73.73K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 3 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS11745- Registry name
- USNH
- Registrant
- University System of New Hampshire
- Abuse contact
- abuse@keene.edu
- Registered
- 1998-12-04
- Last changed
- 2026-07-27
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 67% valid · 2 valid, 1 with no ROA
- ROAs
- 2 authorising AS11745
- ASPA
- no ASPA record
- IRR
- 100% registered · 3 of 3 announcements
- Route objects
- 6 naming AS11745
Reputation
Classification and threat
Education University, school or national research and education network.
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 1,783 prefixes, as published 2026-10-20. 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