OUI Lookup
00100b
Cisco Systems, Inc
Manufacturer Information
- OUI Prefix
- 00100b
- Manufacturer
- Cisco Systems, Inc
- Address
- 170 W. TASMAN DR. SAN JOSE CA US 95134-1706
- Last updated
- 6/8/2026
Vendor Statistics
- Total prefixes
- 1231
- Block type
- MA-L
- Available addresses
- ~16 millones
About prefix 00100B
The OUI prefix 00100B is assigned to Cisco Systems, Inc, based in 170 W. TASMAN DR. SAN JOSE CA US 95134-1706 . It is a MA-L type block of 24 bits (first three octets). Allows up to 16 million unique MAC addresses. If you find this prefix on your network, the devices belong to Cisco Systems, Inc.
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e80ab9Cisco Systems, Inc481ba4Cisco Systems, Inc6c03b5Cisco Systems, Inc908855Cisco Systems, Inc687161Cisco Systems, Inc4cec0fCisco Systems, Inc5c64f1Cisco Systems, Inc5c3e06Cisco Systems, Incc828e5Cisco Systems, Incd009c8Cisco Systems, Inc44643cCisco Systems, Inc24161bCisco Systems, Ince8dc6cCisco Systems, Ince8d322Cisco Systems, Inc34b883Cisco Systems, Inc806a00Cisco Systems, Incacbcd9Cisco Systems, Inc4006d5Cisco Systems, Inc0845d1Cisco Systems, Inc6887c6Cisco Systems, Inc80248fCisco Systems, Incb8a377Cisco Systems, Ince44e2dCisco Systems, Inc1cd1e0Cisco Systems, Inc