macadress

Vendor directory

17,320 blocks registered in United States.

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Every MA-L, MA-M, MA-S, IAB, and CID block IEEE has ever assigned to a named organization, browsable or searchable.

Unique organizations8,981
Total blocks17,320
MA-L count13,489
MA-M count976
MA-S count1,468
IAB count1,288
CID count99
Total address capacity229,003,509,760
Last changed hereAug 25, 2026

Country reflects the address published in the IEEE registration record. It does not indicate where a device was manufactured, sold, located or currently used.

Largest organizations in United States

OrganizationBlocks
Apple, Inc.1,553
Cisco Systems, Inc1,247
IEEE Registration Authority435
Texas Instruments392
Commscope345
Juniper Networks209
Amazon Technologies Inc.204
Dell Inc.184
Hewlett Packard Enterprise176
Silicon Laboratories154
Organization Prefix Type
🇺🇸 Cisco Systems, Inc C0:F8:7F:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc C4:0A:CB:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc C4:14:3C:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc C4:18:FC:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc C4:44:A0:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc C4:46:06:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc C4:4B:31:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc C4:4D:84:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc C4:64:13:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc C4:71:FE:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc C4:72:95:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc C4:7D:4F:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc C4:7E:E0:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc C4:AA:43:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc C4:AB:4D:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc C4:B2:39:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc C4:B3:6A:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc C4:B9:CD:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc C4:C6:03:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc C4:F7:D5:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc C8:00:84:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc C8:28:E5:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc C8:34:E5:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc C8:47:09:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc C8:4C:75:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc C8:60:8F:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc C8:78:F7:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc C8:82:34:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc C8:84:A1:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc C8:9C:1D:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc C8:F9:F9:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc CC:16:7E:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc CC:36:CF:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc CC:46:D6:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc CC:5A:53:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc CC:6A:33:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc CC:70:ED:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc CC:79:D7:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc CC:7F:75:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc CC:7F:76:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc CC:8E:71:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc CC:90:70:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc CC:98:91:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc CC:B6:C8:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc CC:D3:42:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc CC:D5:39:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc CC:D8:C1:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc CC:DB:93:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc CC:ED:4D:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc CC:EF:48:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc D0:09:C8:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc D0:2C:39:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc D0:57:4C:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc D0:72:DC:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc D0:85:43:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc D0:A5:A6:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc D0:C2:82:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc D0:C7:89:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc D0:D0:FD:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc D0:DC:2C:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc D0:E0:42:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc D0:EC:35:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc D4:2B:6F:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc D4:2C:44:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc D4:66:24:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc D4:6A:35:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc D4:6D:50:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc D4:77:98:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc D4:78:9B:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc D4:7F:35:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc D4:8C:B5:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc D4:A0:2A:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc D4:AD:71:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc D4:AD:BD:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc D4:C9:3C:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc D4:D7:48:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc D4:E8:80:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc D4:EB:68:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc D8:24:BD:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc D8:62:CA:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc D8:67:D9:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc D8:B1:90:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc DC:05:39:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc DC:0B:09:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc DC:39:79:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc DC:77:4C:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc DC:7B:94:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc DC:8C:37:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc DC:A5:F4:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc DC:CE:C1:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc DC:D8:3B:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc DC:EB:94:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc DC:F7:19:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc E0:0E:DA:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc E0:2A:66:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc E0:2F:6D:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc E0:5F:B9:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc E0:69:BA:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc E0:89:9D:00:00:00 /24 MA-L 🇺🇸 Cisco Systems, Inc E0:8C:3C:00:00:00 /24 MA-L
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