Autonomous system
AS6373 OPUS1
Unclassified ARIN
Summary
Opus One
enterprise legacy
OPUS1 is Opus One, a network and information-security consulting firm in Tucson, Arizona, founded and run by long-time industry figure Joel Snyder. It has held this AS number since 1996.
What it's used for
- The firm's own corporate network and public services (
opus1.com/opus1.net). - A product-testing lab: Opus One is known for hands-on evaluations of security, email and networking products, and much of its address space fronts test benches and lab gear rather than production services.
- A small amount of colocated infrastructure.
Notable
This is enterprise address space belonging to a consultancy, not an ISP — an unusually large allocation for a small firm, which is the signature of an early registrant. Reverse DNS is telling: hostnames like not-in-use, visitor-wlan and colo-gw-public describe a lab and office network, not subscribers.
The low AS number and the pre-ARIN-era address blocks reflect a 1990s allocation, when a technically active small company could readily obtain both.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Address space
Summary
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 8 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS6373- Registry name
- OPUS1
- Registrant
- Opus One
- Abuse contact
- abuse@opus1.com
- Registered
- 1996-03-25
- Last changed
- 1996-03-25
- Status
- active
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
No IC3 indicators Nothing from the FBI IC3 feed.
Threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere