OUI Lookup
803a59
AT&T
Manufacturer Information
- OUI Prefix
- 803a59
- Manufacturer
- AT&T
- Address
- 1025 Lenox Park Blvd Atlanta GA US 30319
- Last updated
- 6/8/2026
Vendor Statistics
- Total prefixes
- 5
- Block type
- MA-L
- Available addresses
- ~16 millones
About prefix 803A59
The OUI prefix 803A59 is assigned to AT&T, based in 1025 Lenox Park Blvd Atlanta GA US 30319 . 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.