Autonomous system
AS27 UMDNET
Unclassified ARIN
Summary
University of Maryland
education university research legacy
An early allocation (UMDNET) belonging to the University of Maryland in College Park, Maryland.
What it's used for
- Campus, research, and administrative networking for the university.
Notable
- A low AS number reflects an allocation from the internet's earliest years, handed out roughly sequentially. An institutional network, not a commercial ISP.
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 |
|---|---|---|
| AS10886 | University of Maryland | 497 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-16, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 4 prefixes · 134K addresses IPv6 5 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 9 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS27- Registry name
- UMDNET
- Registrant
- University of Maryland
- Abuse contact
- abuse@umd.edu
- Registered
- 1984-08-28
- Last changed
- 2014-02-18
- Allocation
- assigned
Declared
PeeringDB profile
- Name
- UMDNET
- Scope
- Not Disclosed
- Traffic ratio
- Not Disclosed
- Website
- http://www.mdren.net/
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 11 with no ROA
- ROAs
- 1 authorising AS27
- ASPA
- no ASPA record
- IRR
- 100% registered · 11 of 11 announcements
- Route objects
- 6 naming AS27
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 2026-10-17. 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