AS4539 — SEL-AS - Schweitzer Engineering Laboratories, Inc.

AS4539 announces 1 IPv4 prefixes covering 1,024 addresses and 0 IPv6 prefixes.

About this network

SEL-AS — Schweitzer Engineering Laboratories, the employee-owned manufacturer in Pullman, Washington that builds protective relays, automation, and control systems for electric power grids.

What it's used for

• Corporate networking for a manufacturer and its engineering organisation: about 1,024 IPv4 addresses, sized for the company itself rather than customers.

Notable

• An industrial/OT vendor running its own AS — the address space is the company's own, not sold on.
• The ASN was registered to SEL in 2009, so AS4539 is a reissued low number and carries no early-internet history for this holder.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 74.117.212.0/22

Upstream networks

• AS209 CenturyLink Communications, LLC
• AS23138 FIRST STEP INTERNET, LLC
• AS20055 Wholesail networks LLC
• AS3356 Level 3 Parent, LLC
• AS7018 AT&T Enterprises, LLC

Adjacent networks

• AS209 CenturyLink Communications, LLC
• AS23138 FIRST STEP INTERNET, LLC
• AS20055 Wholesail networks LLC
• AS3356 Level 3 Parent, LLC
• AS7018 AT&T Enterprises, LLC

Routing security

• RPKI: 0 valid, 0 invalid and 2 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 50% of announcements registered; 1 route objects.
• Listed in as-sets: AS-FSR, AS-HURRICANE, AS-NOANET-PEERING, AS-RR-BIZ, AS-WHOLESAIL, AS-XO-B, AS19855:AS-CUSTOMERS, AS23138:AS-CONE.