macadress

Taichitel Technology Shanghai Co.,Ltd.

MA-M
MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix90:F4:21:D0:00:00 /28
Vendor addressRoom 502, Building 1, NO. 519 Yide Road, Pudong New Area, Shanghai, China Shanghai CN 200124
Country🇨🇳  China
RegisteredMar 21, 2023
Block range90:F4:21:D0:00:00– 90:F4:21:DF:FF:FF
Address capacity1,048,576
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 →

Ownership timeline

  1. Mar 21, 2023 – Mar 25, 2023 Marinesync Corp name changedaddress changedcountry changed
  2. Mar 25, 2023 – present Taichitel Technology Shanghai Co.,Ltd.

Example addresses in this block

90:F4:21:D0:00:00 90:F4:21:D7:FF:FF 90:F4:21:DF:FF:FF

Where this block sits

Previous 90:F4:21:C0:00:00 /28 ACOBA Next 90:F4:21:E0:00:00 /28 Velan Studios Inc.

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

Taichitel Technology Shanghai Co.,Ltd. holds 1 registered blocks in the IEEE registry, ranking #29,081 of 33,427 organizations by block count.