Cisco Systems MAC Address Prefixes

Cisco makes routers, switches, firewalls, wireless access points and IP phones. It holds one of the largest sets of OUIs in the registry, so Cisco MACs show up on almost every enterprise network.

IEEE blocks: 1,258
Registry names: Cisco Systems, Inc · Cisco Systems Inc
MA-L (24-bit OUI): 1,258

Got a specific address? Look it up in the MAC address lookup →

What to know about Cisco Systems MACs

00:00:0C is Cisco's original OUI. Virtual MACs for HSRP use 00:00:0C:07:AC:xx, where xx is the HSRP group number in hex.
01:00:0C:CC:CC:CC is a Cisco multicast address used by CDP, VTP and DTP — you'll see it as a destination, never as a device's own MAC.
Each switch or router has many MACs (one per port plus a base address), so a single device can appear under several different Cisco OUIs.

All registered blocks

From the IEEE registry via the oui-data package (a mirror of the IEEE listings) (MA-L, MA-M, MA-S), built 2026-11-01.

MA-L (24-bit OUI): 1,258 blocks

00:00:0C
00:01:42
00:01:43
00:01:63
00:01:64
00:01:96
00:01:97
00:01:C7
00:01:C9
00:02:16
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0C:11:67
0C:26:43
0C:27:24
0C:68:03
0C:72:FB
0C:75:BD
0C:85:25
0C:AF:31
0C:D0:F8
0C:D5:D3
0C:D9:96
0C:F5:A4
10:05:CA
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1C:17:D3
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2C:01:B5
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2C:31:24
2C:33:11
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2C:3E:CF
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2C:5A:0F
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2C:73:A0
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A4:56:30
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A4:78:06
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A4:97:00
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A4:B2:39
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A4:DC:D5
A8:0C:0D
A8:4F:B1
A8:9D:21
A8:B1:D4
A8:B4:56
AC:2A:A1
AC:3A:67
AC:4A:56
AC:4A:67
AC:7A:56
AC:7E:8A
AC:A0:16
AC:BC:D9
AC:D4:00
AC:F2:C5
AC:F5:E6
B0:00:B4
B0:1B:FC
B0:26:80
B0:2B:64
B0:7D:47
B0:8B:CF
B0:8B:D0
B0:8D:57
B0:90:7E
B0:A6:51
B0:AA:77
B0:C5:3C
B0:FA:EB
B4:02:16
B4:14:89
B4:4C:90
B4:A4:E3
B4:A8:B9
B4:CA:DD
B4:DE:31
B4:E9:B0
B8:11:4B
B8:38:61
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B8:62:1F
B8:A3:77
B8:BE:BF
B8:C9:24
B8:FE:90
BC:16:65
BC:16:F5
BC:26:C7
BC:2C:E6
BC:4A:56
BC:5A:56
BC:67:1C
BC:8D:1F
BC:AB:F5
BC:B3:0E
BC:C4:93
BC:D2:95
BC:E7:12
BC:F1:F2
BC:FA:EB
C0:14:FE
C0:25:5C
C0:28:97
C0:2C:17
C0:58:2E
C0:62:6B
C0:64:E4
C0:67:AF
C0:7B:BC
C0:8B:2A
C0:8C:60
C0:F8:7F
C4:0A:CB
C4:14:3C
C4:18:FC
C4:44:A0
C4:46:06
C4:4B:31
C4:4D:84
C4:64:13
C4:71:FE
C4:72:95
C4:7D:4F
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C4:AA:43
C4:AB:4D
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C4:B3:6A
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C4:C6:03
C4:F7:D5
C8:00:84
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C8:34:E5
C8:47:09
C8:4C:75
C8:60:8F
C8:78:F7
C8:82:34
C8:84:A1
C8:9C:1D
C8:F9:F9
CC:16:7E
CC:36:CF
CC:46:D6
CC:5A:53
CC:6A:33
CC:70:ED
CC:79:D7
CC:7F:75
CC:7F:76
CC:8E:71
CC:90:70
CC:98:91
CC:B6:C8
CC:D3:42
CC:D5:39
CC:D8:C1
CC:DB:93
CC:ED:4D
CC:EF:48
D0:09:C8
D0:2C:39
D0:57:4C
D0:72:DC
D0:85:43
D0:A5:A6
D0:C2:82
D0:C7:89
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D0:EC:35
D4:2B:6F
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D4:66:24
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D4:C9:3C
D4:D7:48
D4:E8:80
D4:EB:68
D8:24:BD
D8:62:CA
D8:67:D9
D8:B1:90
DC:05:39
DC:0B:09
DC:39:79
DC:5D:89
DC:77:4C
DC:7B:94
DC:8C:37
DC:A5:F4
DC:CE:C1
DC:D8:3B
DC:EB:94
DC:F7:19
E0:0E:DA
E0:2A:66
E0:2F:6D
E0:5F:B9
E0:69:BA
E0:89:9D
E0:8C:3C
E0:AC:F1
E0:D1:73
E0:D4:91
E4:13:5C
E4:1F:7B
E4:37:9F
E4:38:7E
E4:3A:85
E4:4E:2D
E4:62:C4
E4:89:CA
E4:A4:1C
E4:AA:5D
E4:C7:22
E4:D3:F1
E8:04:62
E8:0A:B9
E8:40:40
E8:5C:0A
E8:65:49
E8:79:A3
E8:B7:48
E8:BA:70
E8:BC:E4
E8:D3:22
E8:DC:6C
E8:EB:34
E8:ED:F3
EC:01:D5
EC:19:2E
EC:1D:8B
EC:30:91
EC:44:76
EC:A1:CC
EC:A7:8D
EC:BB:78
EC:BD:1D
EC:C0:18
EC:C8:82
EC:CE:13
EC:DD:24
EC:E1:A9
EC:F4:0C
F0:03:BC
F0:1D:2D
F0:25:72
F0:29:29
F0:4A:02
F0:78:16
F0:7F:06
F0:9E:63
F0:B2:E5
F0:D8:05
F0:F7:55
F4:0F:1B
F4:1F:C2
F4:33:92
F4:4E:05
F4:5B:B4
F4:74:70
F4:7F:35
F4:89:74
F4:AC:C1
F4:B8:21
F4:BD:9E
F4:CF:E2
F4:DB:E6
F4:EA:67
F4:EE:31
F8:0B:CB
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F8:14:DD
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F8:66:F2
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F8:6B:D9
F8:72:EA
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F8:7B:20
F8:A5:C5
F8:A7:3A
F8:B7:E2
F8:C2:88
F8:C6:50
F8:E5:7E
F8:E9:4F
FC:21:20
FC:58:9A
FC:5B:39
FC:72:88
FC:99:47
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