Autonomous system
AS27405 PSC
Unclassified ARIN
Summary
University System of New Hampshire
education business internal
The AS handle PSC is held by University System of New Hampshire.
What it's used for
- The space carries the university's internal network, evidenced by the netname
PLYMOUTHand registrantUniversity System of New Hampshire. - The AS announces 65536 IPv4 addresses across 1 prefix with 5 observed neighbours, indicating a single-site or internal corporate estate rather than a transit or access network.
Notable
- The registrant
University System of New Hampshireagrees with the announcer, confirming the space is owned by the institution. - The address inventory consists of a single /16 block (158.136.0.0/16), representing a finely subdivided internal estate for the university system.
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 1 prefixes · 65.54K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 1 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS27405- Registry name
- PSC
- Registrant
- University System of New Hampshire
- Abuse contact
- abuse@keene.edu
- Registered
- 2003-02-27
- Last changed
- 2021-11-24
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 100% valid · 1 valid, 0 with no ROA
- ROAs
- 1 authorising AS27405
- ASPA
- no ASPA record
- IRR
- 100% registered · 1 of 1 announcements
- Route objects
- 2 naming AS27405
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 1,783 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