Autonomous system
AS32361 ULTRALIGHT
Unclassified ARIN
Summary
UltraLight
business wan leased
ULTRALIGHT is the AS handle for UltraLight, a US-based operator.
What it's used for
- The space carries mixed infrastructure, including leased datacenter capacity and a small WAN segment, evidenced by netnames
CL-260(CyrusOne LLC) andULTRALIGHT-WAN-01(UltraLight). - With 1026 IPv4 addresses and 20 IPv6 prefixes announced against only 3 observed neighbours, the ratio suggests a small-scale business or internal network rather than a transit provider.
Notable
- Registrants do not fully agree with the announcer; the largest prefixes are registered to CyrusOne LLC and CENIC, while the smallest is registered to UltraLight.
- The address inventory is fragmented, consisting of two /24s and a /23 from CyrusOne, a /24 from UltraLight, and a /31 from CENIC, indicating a collection of leased or acquired blocks rather than a contiguous native allocation.
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 2026-10-14, 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 · 1.03K addresses IPv6 20 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 24 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS32361- Registry name
- ULTRALIGHT
- Registrant
- UltraLight
- Abuse contact
- hep-wheel@caltech.edu
- Registered
- 2004-04-20
- Last changed
- 2012-03-02
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 11 with no ROA
- ROAs
- 0 authorising AS32361
- ASPA
- no ASPA record
- IRR
- 100% registered · 11 of 11 announcements
- Route objects
- 7 naming AS32361
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 1,773 prefixes, as published 2026-10-13. 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