18:C3:F4:30:00:00 to 18:C3:F4:3F:FF:FF
General Test Systems
Inspect this prefixRegistered address
Building C–A7 Suite 805, 2190 Liuxian Avenue,Nanshan District
Shenzhen Guangdong 518055
Block details
- Registry
- MA-M, MAC Address Block Medium (OUI-28)
- Prefix
- 18:C3:F4:3 /28
- Addresses in block
- 1,048,576
- Decimal range
- 27,229,894,475,776 to 27,229,895,524,351
- Address type
- Unicast, universally administered
What this block covers
A 28 bit block. Sixteen of these fit inside one 24 bit prefix, so the first three octets are shared with other registrants.
Any MAC address between 18:C3:F4:30:00:00 and 18:C3:F4:3F:FF:FF belongs to this assignment. The registrant chooses the remaining 20 bits, so the same prefix can appear on very different products from the same company.