macadress

Shanghai Kanghai Information System 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.
Prefix78:13:05:90:00:00 /28
Vendor address9th FIoor, Building 9, No.1 Qingxiang road, BaoNeng Science and TechnoIogy Industrial Park, Longhua New District ShenZhen GuangDong CN 518000
Country🇨🇳  China
RegisteredApr 22, 2021
Block range78:13:05:90:00:00– 78:13:05:9F: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. Apr 22, 2021 – Sep 5, 2025 Shenzhen C & D Electronics Co., Ltd. name changed
  2. Sep 5, 2025 – present Shanghai Kanghai Information System CO.,LTD.

Example addresses in this block

78:13:05:90:00:00 78:13:05:97:FF:FF 78:13:05:9F:FF:FF

Where this block sits

Previous 78:13:05:80:00:00 /28 Shenzhen AV-Display Co.,Ltd Next 78:13:05:A0:00:00 /28 Leonardo SpA - Montevarchi

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

Shanghai Kanghai Information System CO.,LTD. holds 32 registered blocks in the IEEE registry, ranking #111 of 33,427 organizations by block count.

Other blocks registered to Shanghai Kanghai Information System CO.,LTD.

04:58:5D:E0:00:00 /28 MA-M 04:A1:6F:00:00:00 /28 MA-M 04:EE:E8:70:00:00 /28 MA-M 0C:5C:B5:80:00:00 /28 MA-M 10:63:A3:80:00:00 /28 MA-M 18:C3:F4:D0:00:00 /28 MA-M 34:46:63:90:00:00 /28 MA-M 34:C8:D6:E0:00:00 /28 MA-M 38:A8:CD:70:00:00 /28 MA-M 48:5E:0E:00:00:00 /28 MA-M 54:A4:93:40:00:00 /28 MA-M 58:23:BC:40:00:00 /28 MA-M