OUI Lookup
00071c
AT&T
Manufacturer Information
- OUI Prefix
- 00071c
- Manufacturer
- AT&T
- Address
- 3300 E Renner Road Richardson TX US 75082
- Last updated
- 6/11/2026
Vendor Statistics
- Total prefixes
- 5
- Block type
- MA-L
- Available addresses
- ~16 millones
About prefix 00071C
The OUI prefix 00071C is assigned to AT&T, based in 3300 E Renner Road Richardson TX US 75082 . 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 AT&T.