00:12:3C Second Rule LLC
Every MAC address from 00:12:3C:00:00:00 to 00:12:3C:FF:FF:FF belongs to a block the IEEE assigned to Second Rule LLC. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who 00:12:3C belongs to
Written 00:12:3C, 00-12-3C or 00123C, depending on the system. Look up a full address.
Prefix
00:12:3C
Organization
Second Rule LLC
Registry
MA-L (a 24-bit OUI)
Addresses
16,777,216
First address
00:12:3C:00:00:00
Last address
00:12:3C:FF:FF:FF
Address type
Globally unique, unicast
Registered address
4119 Walnut Street Philadelphia PA US 19104