AGFEO GmbH & Co. KG — MAC prefix identifies a registry assignment
Summary
- // what this is
- AGFEO GmbH & Co. KG is registered to MAC prefix
00:09:40in the IEEE OUI database. When a device's MAC address begins with00:09:40, that block was registered by AGFEO GmbH & Co. KG — the OUI identifies the maker of the network hardware, which is not always the brand on the device. - // analyst note
- The exact 24-bit prefix fixes the first-byte Group and Local bits at 0; 24 suffix bits allow 16,777,216 possible values, not an observed device count. A match establishes the registry assignment, not a product mapping or deployment.
About this vendor.
A MAC address beginning 00:09:40 matches an IEEE MA-L assignment to AGFEO GmbH & Co. KG; it does not identify a specific device or product. The first-party history describes AGFEO’s work in telecommunications, including telephone charge counters, telephone systems, and digital communications systems. Its company catalog lists phones and headsets, cloud telephone systems, IP and VoIP telephone systems, SIP providers, software and apps, and DECT IP products. The sources do not map any of these products to this prefix.
This is a 24-bit prefix, leaving 24 bits, or 16,777,216 possible suffix values. That number describes possible address suffixes, not observed devices or shipments. The first byte 00 has Group bit 0 and Local bit 0, as fixed for this exact prefix. Changing either bit produces a different prefix; it does not describe variation within this assignment. RFC 7042 explains MAC prefix and bit interpretation.
A matching address supports the registry assignment only, not deployment, traffic prevalence, current vendor identity, or security state.
- Prefix
00:09:40(24 bits, MA-L) [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Company
- AGFEO GmbH & Co. KG [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Registry
- MA-L [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Country
- Germany [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Industry
- Telecommunications systems and products [Confirmed] — https://agfeo.de/historie/
- Notable products
- Phones and headsets; cloud telephone systems; IP and VoIP telephone systems; SIP providers; software and apps; DECT IP products [Confirmed] — https://agfeo.de/presse/
- Device types
- Unknown; no retrieved source maps a device category to this exact prefix.
- History
- Founded in Bielefeld in 1947; the history page describes early telephone charge counters and later telephone systems. [Confirmed] — https://agfeo.de/historie/
- Website
- https://agfeo.de/presse/ [Confirmed] — https://agfeo.de/presse/