OUI Lookup
9c4e20
Cisco Systems, Inc
Manufacturer Information
- OUI Prefix
- 9c4e20
- Manufacturer
- Cisco Systems, Inc
- Address
- 80 West Tasman Drive San Jose CA US 94568
- Last updated
- 6/9/2026
Vendor Statistics
- Total prefixes
- 1231
- Block type
- MA-L
- Available addresses
- ~16 millones
About prefix 9C4E20
The OUI prefix 9C4E20 is assigned to Cisco Systems, Inc, based in 80 West Tasman Drive San Jose CA US 94568 . 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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