Autonomous system
AS2721 SCLR
Unclassified ARIN
Summary
C-Light Network (Clemson University)
education research legacy
A network operated by CULR, LLC (SCLR) in Clemson, South Carolina, part of the C-Light regional optical/research network associated with Clemson University.
What it's used for
- Regional research and education networking for Clemson University and connected institutions in South Carolina.
Notable
- An institutional research-network allocation, not a commercial ISP or host.
Interesting
- Sibling of AS2722, which carries the
C-LIGHTname under the same operator.
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 2026-10-21, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 7 prefixes · 8.70K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 8 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS2721- Registry name
- SCLR
- Registrant
- CULR, LLC
- Abuse contact
- abuse@clemson.edu
- Registered
- 2009-08-28
- Last changed
- 2016-02-04
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 6 with no ROA
- ROAs
- 0 authorising AS2721
- ASPA
- no ASPA record
- IRR
- 67% registered · 4 of 6 announcements 1 other origin
- Route objects
- 4 naming AS2721
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 1,779 prefixes, as published 2026-10-22. 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