ADVANCED COMPRESSION TECHNOLOGY, INC. — MAC Prefix Identification

A MAC address beginning with 00:20:90 matches an IEEE MA-L assignment registered to ADVANCED COMPRESSION TECHNOLOGY, INC.; the record does not identify a device type. The assignment establishes a registry match, not which company or device currently uses a captured address, or whether it was deployed by this registrant.

00:20:90 is a 24-bit prefix, leaving 24 bits for the remainder of a 48-bit MAC address. That creates 16,777,216 possible suffix values; it is a count of possible values, not a count of devices or shipments. A match to all three prefix octets identifies the assignment boundary. A partial match does not establish an exact assignment match.

The first octet, 00, has Group and Local bits both clear. For this exact prefix, those bits are fixed; changing either bit produces a different prefix. RFC 7042 describes these bits in MAC identifiers and the structure of EUI-48 identifiers. This IEEE record gives the company name and a US country indication, but no assignment date or device mapping.

Matching prefix

00:20:90 (MA-L, 24 bits) [Confirmed]

Device type

Unknown; no device category is mapped to this prefix [Unknown]

Company

ADVANCED COMPRESSION TECHNOLOGY, INC. [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv

Registry

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

Prefix

00:20:90 [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv

Country

United States [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv

Device type

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

Assignment date

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