SHIELD-CCTV CO.,LTD.

MA-S

MA-S: a /36 block (also called an OUI-36 assignment), IEEE's smallest, covering 4,096 addresses.

Prefix8C:1F:64:DD:20:00 /36

Vendor address1F., No. 80. Gong'an St. Pingtung City TW 900026

RegisteredMay 21, 2025

Block range8C:1F:64:DD:20:00– 8C:1F:64:DD:2F:FF

Address capacity4,096

AdministrationUniversally administered: its prefix comes from a block registered through the IEEE Registration Authority

TransmissionUnicast: addressed to a single device

SourceIEEE Registration Authority

Address capacity is the size of this registered block, not a count of devices actually manufactured or online. Registration identifies the organization holding the block, not a specific device model or unit.

Curious how a prefix like this turns into a full address? See how MAC addresses are structured →

Example addresses in this block

8C:1F:64:DD:20:00 8C:1F:64:DD:27:FF 8C:1F:64:DD:2F:FF

Where this block sits

Previous 8C:1F:64:DD:00:00 /36 GENIUS SPORTS Next 8C:1F:64:DD:30:00 /36 CHUGOKU ELECTRICAL INSTRUMENTS Co.,LTD.

The nearest registered blocks of the same size on either side of this one in IEEE's address space.

SHIELD-CCTV CO.,LTD. holds 1 registered blocks in the IEEE registry, ranking #27,143 of 33,427 organizations by block count.