MAC Address Lookup

Extreme Networks, Inc. 40:3F:43

40:3F:43 is a 24-bit MA-L MAC address block registered to Extreme Networks, Inc. in US.

Vendor

Extreme Networks, Inc.

MA-L · 24-bit
40:3F:43

Unicast · Universally administered (U/L bit clear)

Matched prefix
40:3F:43
Match
MA-L assignment
Address range
40:3F:43:00:00:00 – 40:3F:43:FF:FF:FF
Addresses in block
16,777,216
Country
US
Organization address
2121 RDU Center Drive Morrisville NC US 27560
First registered
Mar 4, 2025

Formats

  • Plain hex 403F43
  • Colon-separated 40:3F:43
  • Hyphen-separated 40-3F-43
  • Cisco dot notation 403F.43

Prefix lineage

This prefix has changed hands. Dates are when each change was first observed in public registration data (runZero mac-tracker).

  1. Extreme Networks Headquarters Mar 4, 2025
  2. Extreme Networks, Inc. Jun 26, 2026