2N TELEKOMUNIKACE a.s.

Any device whose MAC address begins with 7C:1E:B3 has a network interface built by 2N TELEKOMUNIKACE a.s.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

7C:1E:B3

Organization

2N TELEKOMUNIKACE a.s.

Address

Modranska 621 Prague CZ 143 01

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.