AT&T

AT&T holds 5 OUI prefixes in the IEEE registry. Each prefix is the first three octets of a MAC address and covers a block of 16,777,216 addresses, so devices built by AT&T draw from a pool of about 83,886,080 possible MAC addresses in total.

Registered address: 1025 Lenox Park Blvd Atlanta GA US 30319

All 5 prefixes

• 00:07:1C00:07:1C:00:00:00 – 00:07:1C:FF:FF:FF
• 00:60:D300:60:D3:00:00:00 – 00:60:D3:FF:FF:FF
• 08:00:6A08:00:6A:00:00:00 – 08:00:6A:FF:FF:FF
• 80:00:1080:00:10:00:00:00 – 80:00:10:FF:FF:FF
• 80:3A:5980:3A:59:00:00:00 – 80:3A:59:FF:FF:FF

Have a full MAC address? Look it up to see which of these prefixes it belongs to — or browse the full manufacturer directory.