OUI Lookup
00023d
Cisco Systems, Inc
Manufacturer Information
- OUI Prefix
- 00023d
- Manufacturer
- Cisco Systems, Inc
- Address
- 170 West Tasman Drive San Jose CA US 95134
- Last updated
- 6/11/2026
Vendor Statistics
- Total prefixes
- 1231
- Block type
- MA-L
- Available addresses
- ~16 millones
About prefix 00023D
The OUI prefix 00023D is assigned to Cisco Systems, Inc, based in 170 West Tasman Drive San Jose CA US 95134 . 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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