AS6373 — OPUS1
AS6373 announces 7 IPv4 prefixes covering 9,984 addresses and 1 IPv6 prefixes.
About this network
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.
Announced prefixes
- 192.35.195.0/24
- 192.245.12.0/23
- 192.245.15.0/24
- 199.79.152.0/24
- 204.27.149.0/24
- 204.52.218.0/24
- 207.182.32.0/19
- 2607:7c80:57::/48
Upstream networks
Adjacent networks
Internet exchanges
- Fremont Cabal Internet Exchange — Fremont, United States
awaiting query
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