Shenzhen Ogemray Technology Co.,Ltd: MAC prefixes identify registry assignments

A MAC address beginning with 70:F1:1C or 7C:DD:90 matches an IEEE MA-L assignment registered to Shenzhen Ogemray Technology Co.,Ltd. This identifies the matching registry record; the supplied evidence does not identify a device category or product using either prefix.

For 48-bit MAC addresses with a 24-bit prefix, 24 bits remain for the suffix, allowing 2^24 = 16,777,216 possible suffix values per prefix. This is a mathematical address-space size, not a count of devices, shipments, or addresses observed in use.

The first byte of each prefix has Group bit 0 and Local bit 0. Under RFC 7042, those bits correspond to masks 01 and 02: for these exact prefixes they are fixed at zero, indicating an individual, globally assigned prefix. Changing either bit changes the prefix and no longer matches the exact assignment. A captured address matching one of them establishes a prefix match, not the device's identity, present owner, or security state.

The IEEE CSV records show two MA-L assignments under two name variants: “Shenzhen Ogemray Technology Co.,Ltd” for 70:F1:1C and “Shenzhen Ogemray Technology Co., Ltd.” for 7C:DD:90. The records provide no assignment dates, and the supplied sources establish no device or product mapping.

Matching prefixes

70:F1:1C and 7C:DD:90 [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv

Vendor

Shenzhen Ogemray Technology Co.,Ltd [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv

Registry

MA-L [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv

Prefixes

70:F1:1C, 7C:DD:90 [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv

Device category

Unknown [Unknown] — https://standards-oui.ieee.org/oui/oui.csv