Autonomous system
AS15119 SOUTHERN-ILLINOIS-UNIVERSITY
Unclassified ARIN
Summary
Southern Illinois University Carbondale
education research business
Four announcements that tile one range, with the pieces the medical school routes left out.
What it's used for
- A university network. Four IPv4 prefixes announced from the United States, no IPv6, and three observed BGP neighbours.
Notable
- All four prefixes come out of
131.230, at four different lengths, covering the range in successively smaller pieces. - The pieces missing from that sequence are the ones announced by the neighbouring AS number belonging to this university's own school of medicine.
- Every resolved block carries the netname
SIU-NETand is registered to the university itself. - One of twelve sampled addresses answered, as
mclaf-9e-7448-b.infra.siu.edu, a building abbreviation followed by three short codes under a subdomain for infrastructure. - One registry lookup failed, so that block's ownership is unknown rather than absent.
Interesting
- Reading this record alongside the medical school's shows what a registry cannot: one allocation, one netname, one registrant, and two separate networks with different transit underneath. Anyone attributing traffic by registered holder gets the university for both; anyone attributing by AS number gets two institutions.
- The reverse name encodes a building and a piece of equipment inside it. That is more physical detail than most holders publish, and it is exactly the sort of naming that maps a campus for anyone who collects it.
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 2026-10-18, 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 · 61.44K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 4 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS15119- Registry name
- SOUTHERN-ILLINOIS-UNIVERSITY
- Registrant
- Southern Illinois University Carbondale
- Abuse contact
- tech@siu.edu
- Registered
- 2000-03-22
- Last changed
- 2012-03-02
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 100% valid · 1 valid, 0 with no ROA
- ROAs
- 1 authorising AS15119
- ASPA
- no ASPA record
- IRR
- 100% registered · 1 of 1 announcements
- Route objects
- 1 naming AS15119
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 1,784 prefixes, as published 2026-10-19. 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