00:40:7D EXTENSION TECHNOLOGY CORP.
Every MAC address from 00:40:7D:00:00:00 to 00:40:7D:FF:FF:FF belongs to a block the IEEE assigned to EXTENSION TECHNOLOGY CORP.. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who 00:40:7D belongs to
Written 00:40:7D, 00-40-7D or 00407D, depending on the system. Look up a full address.
Prefix
00:40:7D
Organization
EXTENSION TECHNOLOGY CORP.
Registry
MA-L (a 24-bit OUI)
Addresses
16,777,216
First address
00:40:7D:00:00:00
Last address
00:40:7D:FF:FF:FF
Address type
Globally unique, unicast
Registered address
30 HOLLIS STREET FRAMINGHAM MA US 01701