macadress

Ocamar Technologies (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.
PrefixE0:3C:1C:90:00:00 /28
Vendor address2F, Block C, Bld. 20, No. 2388 Chenhang Road, Minhang District Shanghai Shanghai CN 201100
Country🇨🇳  China
RegisteredJan 11, 2023
Block rangeE0:3C:1C:90:00:00– E0:3C:1C:9F: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. Jan 11, 2023 – Jan 13, 2023 Ocamar Technologies(Shanghai)Co.,Ltd. name changedaddress changed
  2. Jan 13, 2023 – present Ocamar Technologies (Shanghai) Co.,Ltd.

Example addresses in this block

E0:3C:1C:90:00:00 E0:3C:1C:97:FF:FF E0:3C:1C:9F:FF:FF

Where this block sits

Previous E0:3C:1C:80:00:00 /28 Jiangsu Riying Electronics Co.,Ltd. Next E0:3C:1C:A0:00:00 /28 MELAG Medizintechnik GmbH & Co. KG

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

Ocamar Technologies (Shanghai) Co.,Ltd. holds 1 registered blocks in the IEEE registry, ranking #21,839 of 33,427 organizations by block count.