Which company owns MAC address prefix BC:AF:91?

MAC address prefix BC:AF:91 is registered to TE Connectivity Sensor Solutions in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with BC:AF:91 has a network interface built by TE Connectivity Sensor Solutions.

What is the OUI BC:AF:91?

BC:AF:91 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to TE Connectivity Sensor Solutions. It covers every address from BC:AF:91:00:00:00 to BC:AF:91:FF:FF:FF, or 16,777,216 addresses in total. It is also written BC-AF-91.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in BC:AF:91:00:00:00 that is BC:AF:91 — and look that prefix up in the IEEE OUI registry. If the second-lowest bit of the first octet is set, the address is locally administered (a randomized or private MAC), which belongs to no manufacturer and will not resolve; modern phones and laptops use these by default on each network.

Where is TE Connectivity Sensor Solutions located?

TE Connectivity Sensor Solutions is listed at 4 rue Gaye-Marie, CS 83163 Toulouse FR 31027 in the IEEE OUI registry entry for BC:AF:91. This is the address the organization registered with the IEEE, which may differ from its current operating address.

TE Connectivity Sensor Solutions

MAC address prefix BC:AF:91 is registered to TE Connectivity Sensor Solutions in the IEEE OUI registry. Any device whose MAC address begins with BC:AF:91 has a network interface built by TE Connectivity Sensor Solutions. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address — it covers every MAC from BC:AF:91:00:00:00 to BC:AF:91:FF:FF:FF.

OUI prefix: BC:AF:91
Hyphen form: BC-AF-91
MAC range: BC:AF:91:00:00:00 – BC:AF:91:FF:FF:FF
Addresses in block: 16,777,216
Organization: TE Connectivity Sensor Solutions
Address: 4 rue Gaye-Marie, CS 83163 Toulouse FR 31027
Source: IEEE OUI registry

Have a full MAC address? Look it up— we'll also tell you if it's a randomized (private) address rather than a real manufacturer prefix.

Assignment history (2)

The IEEE registry publishes current state only — this is the change record we've kept since we started tracking it daily.

2018-12-21Assigned to "TE Connectivity Sensor Solutions"
archived source →
2026-07-17Assigned to "TE Connectivity Sensor Solutions"

Nearby in the registry

The prefixes assigned immediately before and after BC:AF:91:

FAQ

Which company owns MAC address prefix BC:AF:91?: MAC address prefix BC:AF:91 is registered to TE Connectivity Sensor Solutions in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with BC:AF:91 has a network interface built by TE Connectivity Sensor Solutions.
What is the OUI BC:AF:91?: BC:AF:91 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to TE Connectivity Sensor Solutions. It covers every address from BC:AF:91:00:00:00 to BC:AF:91:FF:FF:FF, or 16,777,216 addresses in total. It is also written BC-AF-91.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in BC:AF:91:00:00:00 that is BC:AF:91 — and look that prefix up in the IEEE OUI registry. If the second-lowest bit of the first octet is set, the address is locally administered (a randomized or private MAC), which belongs to no manufacturer and will not resolve; modern phones and laptops use these by default on each network.
Where is TE Connectivity Sensor Solutions located?: TE Connectivity Sensor Solutions is listed at 4 rue Gaye-Marie, CS 83163 Toulouse FR 31027 in the IEEE OUI registry entry for BC:AF:91. This is the address the organization registered with the IEEE, which may differ from its current operating address.