00:1C:7B Castlenet Technology Inc.
Every MAC address from 00:1C:7B:00:00:00 to 00:1C:7B:FF:FF:FF belongs to a block the IEEE assigned to Castlenet Technology Inc.. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who 00:1C:7B belongs to
Written 00:1C:7B, 00-1C-7B or 001C7B, depending on the system. Look up a full address.
Prefix
00:1C:7B
Organization
Castlenet Technology Inc.
Registry
MA-L (a 24-bit OUI)
Addresses
16,777,216
First address
00:1C:7B:00:00:00
Last address
00:1C:7B:FF:FF:FF
Address type
Globally unique, unicast
Registered address
5F., No. 10, Daye Rd., Beitou Dist. Taipei City TW 112030