Cisco Systems, Inc MAC Address Prefixes | macadress

Cisco Systems, Inc 1,247 blocks

Every MAC/OUI block IEEE has registered to this exact organization name, combined.

Registered nameCisco Systems, Inc

Total assignments1,247

Total address capacity20,921,188,352

First tracked hereAug 22, 2026

Last changed hereAug 22, 2026

SourceIEEE Registration Authority

Vendor registration identifies the organization holding a block, not a specific device model, product line, or manufacturing date. This page combines every block IEEE has registered under this exact organization name; it doesn't mean every address in every listed block is currently shipping in a real device.

Assignments by type

Type	Count
MA-L	1,247

Countries in IEEE's registration records

Country	Blocks
🇺🇸 United States	1,247

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1,247 registered prefixes

Prefix Type

00:23:5E:00:00:00 /24 MA-L 00:23:AB:00:00:00 /24 MA-L 00:23:AC:00:00:00 /24 MA-L 00:23:EA:00:00:00 /24 MA-L 00:23:EB:00:00:00 /24 MA-L 00:24:13:00:00:00 /24 MA-L 00:24:14:00:00:00 /24 MA-L 00:24:50:00:00:00 /24 MA-L 00:24:51:00:00:00 /24 MA-L 00:24:97:00:00:00 /24 MA-L 00:24:98:00:00:00 /24 MA-L 00:24:C3:00:00:00 /24 MA-L 00:24:C4:00:00:00 /24 MA-L 00:24:F7:00:00:00 /24 MA-L 00:24:F9:00:00:00 /24 MA-L 00:25:45:00:00:00 /24 MA-L 00:25:46:00:00:00 /24 MA-L 00:25:83:00:00:00 /24 MA-L 00:25:84:00:00:00 /24 MA-L 00:25:B4:00:00:00 /24 MA-L 00:25:B5:00:00:00 /24 MA-L 00:26:0A:00:00:00 /24 MA-L 00:26:0B:00:00:00 /24 MA-L 00:26:51:00:00:00 /24 MA-L 00:26:52:00:00:00 /24 MA-L 00:26:98:00:00:00 /24 MA-L 00:26:99:00:00:00 /24 MA-L 00:26:CA:00:00:00 /24 MA-L 00:26:CB:00:00:00 /24 MA-L 00:27:0C:00:00:00 /24 MA-L 00:27:0D:00:00:00 /24 MA-L 00:27:90:00:00:00 /24 MA-L 00:27:E3:00:00:00 /24 MA-L 00:29:C2:00:00:00 /24 MA-L 00:2A:10:00:00:00 /24 MA-L 00:2A:6A:00:00:00 /24 MA-L 00:2C:C8:00:00:00 /24 MA-L 00:2F:5C:00:00:00 /24 MA-L 00:30:19:00:00:00 /24 MA-L 00:30:24:00:00:00 /24 MA-L 00:30:40:00:00:00 /24 MA-L 00:30:71:00:00:00 /24 MA-L 00:30:78:00:00:00 /24 MA-L 00:30:7B:00:00:00 /24 MA-L 00:30:80:00:00:00 /24 MA-L 00:30:85:00:00:00 /24 MA-L 00:30:94:00:00:00 /24 MA-L 00:30:96:00:00:00 /24 MA-L 00:30:A3:00:00:00 /24 MA-L 00:30:B6:00:00:00 /24 MA-L 00:30:F2:00:00:00 /24 MA-L 00:32:17:00:00:00 /24 MA-L 00:35:1A:00:00:00 /24 MA-L 00:38:DF:00:00:00 /24 MA-L 00:3A:7D:00:00:00 /24 MA-L 00:3A:98:00:00:00 /24 MA-L 00:3A:99:00:00:00 /24 MA-L 00:3A:9A:00:00:00 /24 MA-L 00:3A:9B:00:00:00 /24 MA-L 00:3A:9C:00:00:00 /24 MA-L 00:3C:10:00:00:00 /24 MA-L 00:40:0B:00:00:00 /24 MA-L 00:40:96:00:00:00 /24 MA-L 00:41:D2:00:00:00 /24 MA-L 00:42:5A:00:00:00 /24 MA-L 00:42:68:00:00:00 /24 MA-L 00:45:1D:00:00:00 /24 MA-L 00:50:0B:00:00:00 /24 MA-L 00:50:0F:00:00:00 /24 MA-L 00:50:14:00:00:00 /24 MA-L 00:50:2A:00:00:00 /24 MA-L 00:50:3E:00:00:00 /24 MA-L 00:50:50:00:00:00 /24 MA-L 00:50:53:00:00:00 /24 MA-L 00:50:54:00:00:00 /24 MA-L 00:50:73:00:00:00 /24 MA-L 00:50:80:00:00:00 /24 MA-L 00:50:A2:00:00:00 /24 MA-L 00:50:A7:00:00:00 /24 MA-L 00:50:BD:00:00:00 /24 MA-L 00:50:D1:00:00:00 /24 MA-L 00:50:E2:00:00:00 /24 MA-L 00:50:F0:00:00:00 /24 MA-L 00:56:2B:00:00:00 /24 MA-L 00:57:D2:00:00:00 /24 MA-L 00:59:6C:00:00:00 /24 MA-L 00:59:DC:00:00:00 /24 MA-L 00:5D:73:00:00:00 /24 MA-L 00:5F:86:00:00:00 /24 MA-L 00:60:09:00:00:00 /24 MA-L 00:60:2F:00:00:00 /24 MA-L 00:60:3E:00:00:00 /24 MA-L 00:60:47:00:00:00 /24 MA-L 00:60:5C:00:00:00 /24 MA-L 00:60:70:00:00:00 /24 MA-L 00:60:83:00:00:00 /24 MA-L 00:62:EC:00:00:00 /24 MA-L 00:64:40:00:00:00 /24 MA-L 00:6B:F1:00:00:00 /24 MA-L 00:6C:BC:00:00:00 /24 MA-L