Autonomous system
AS5661 USF - UNIVERSITY OF SOUTH FLORIDA
Education ARIN
Summary
University of South Florida
education university research legacy
USF is the University of South Florida, a large public research university in Tampa, Florida. AS5661 is its campus network, an ARIN allocation dating to 1995.
What it's used for
- Carrying traffic for USF's campuses, research computing, and university services out of the legacy
131.247.0.0/16block, alongside an IPv6 /32.
Notable
- An institutional network, not a commercial one: addresses here belong to campus workstations, labs, residence halls, and university-run services rather than paying subscribers.
- The whole of a class-B network sits behind this ASN, a size of allocation that was routine for universities in the early internet and is rarely granted now.
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
Recorded at 1 exchange in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| Tampa Internet Exchange | Tampa, United States | 206.108.114.9 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-02, 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 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 2 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS5661- Registry name
- USF
- Registrant
- UNIVERSITY OF SOUTH FLORIDA
- Abuse contact
- security@usf.edu
- Registered
- 1995-07-23
- Last changed
- 2022-04-26
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 100% valid · 2 valid, 0 with no ROA
- ROAs
- 2 authorising AS5661
- ASPA
- no ASPA record
- IRR
- 100% registered · 2 of 2 announcements
- Route objects
- 3 naming AS5661
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: 449 networks and 1,846 prefixes, as published 2026-11-03. 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