00:12:57:00:00:00 to 00:12:57:FF:FF:FF
LeapComm Communication Technologies Inc.
Registered address
RM1804-05 South Tower Hong Kong Plaza, No.283 Huaihai Zhong Road
Shanghai 200021
Block details
- Registry
- MA-L, MAC Address Block Large (OUI)
- Prefix
- 00:12:57 /24
- Addresses in block
- 16,777,216
- Decimal range
- 78,769,029,120 to 78,785,806,335
- Address type
- Unicast, universally administered
What this block covers
The classic 24 bit OUI. The registrant owns the first three octets and can assign every one of the remaining 16.7 million addresses.
Any MAC address between 00:12:57:00:00:00 and 00:12:57:FF:FF:FF belongs to this assignment. The registrant chooses the remaining 24 bits, so the same prefix can appear on very different products from the same company.
Look up another MAC address
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