Autonomous system
AS21995 CLS-NETWORK-01
Unclassified ARIN
Summary
Canadian Light Source
research synchrotron business canada
The AS handle CLS-NETWORK-01 is operated by Canadian Light Source Inc.
What it's used for
- The space carries the internal network for the Canadian Light Source, a synchrotron light source facility located in Saskatoon, Saskatchewan.
- The inventory consists of a single IPv4 prefix, 199.45.167.0/24, comprising 256 addresses, with 0 IPv6 prefixes announced.
- With only 1 observed neighbour, the low address-to-neighbour ratio indicates this is a small, isolated internal corporate estate rather than a transit or access network.
Notable
- The registrant for the sole prefix 199.45.167.0/24 is Canadian Light Source Inc., which matches the AS holder exactly.
- The address inventory is minimal, consisting of a single /24 block that is finely subdivided for internal site segmentation.
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 1 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS22950 | University of Saskatchewan | 68 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-16, 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 · 256 addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| CA | Canada | 1 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS21995- Registry name
- CLS-NETWORK-01
- Registrant
- Canadian Light Source Inc.
- Abuse contact
- networkengineers@lightsource.ca
- Registered
- 2023-04-11
- Last changed
- 2023-04-11
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 1 with no ROA
- ROAs
- 0 authorising AS21995
- ASPA
- no ASPA record
- IRR
- 100% registered · 1 of 1 announcements
- Route objects
- 1 naming AS21995
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 1,783 prefixes, as published 2026-10-17. 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