E-SYSTEMS, INC./GARLAND DIV.

Any device whose MAC address begins with 00:40:62 has a network interface built by E-SYSTEMS, INC./GARLAND DIV.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:40:62

Organization

E-SYSTEMS, INC./GARLAND DIV.

Address

P.O. BOX 660023 DALLAS TX US 75266-0023

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.