Autonomous system
AS3140 TJHSST-AS
Education ARIN
Summary
Thomas Jefferson High School for Science and Technology
education legacy
TJHSST-AS belongs to the Thomas Jefferson High School for Science and Technology in Alexandria, Virginia, a public magnet school in the Fairfax County school system. ARIN registered the ASN in November 1993.
What it's used for
- Carrying the school's own routed address space, used by its computer systems lab, student-run services and campus network rather than by a commercial provider.
Notable
- Institutional address space, not eyeball or hosting space. Traffic here is a single organisation's campus network.
- A secondary school holding its own AS number and a sizeable IPv4 block is genuinely unusual. Almost every other network in this range belongs to a university, a corporation or a government body.
Interesting
- The 1993 registration date puts this among the early ARIN-era allocations, from a period when a school with a strong computing programme could still ask for and receive its own autonomous 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.
Transit providers
1 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS40220 | Virginia Polytechnic Institute and State Univ. | 95 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-28, 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 · 4.10K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 2 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS3140- Registry name
- TJHSST-AS
- Registrant
- The Thomas Jefferson High School for Science and Tech.
- Abuse contact
- Bryan.Phillips@tjhsst.edu
- Registered
- 1993-11-22
- Last changed
- 2018-04-05
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 2 with no ROA
- ROAs
- 0 authorising AS3140
- ASPA
- no ASPA record
- IRR
- 100% registered · 2 of 2 announcements
- Route objects
- 2 naming AS3140
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: 448 networks and 1,851 prefixes, as published 2026-10-29. 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