MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:07:1C:00:00:00 /24
Vendor address3300 E Renner Road Richardson TX US 75082
Country🇺🇸 United States
RegisteredOct 24, 2001
Block range00:07:1C:00:00:00– 00:07:1C:FF:FF:FF
Address capacity16,777,216
AdministrationUniversally administered: its prefix comes from a block registered through the IEEE Registration Authority
TransmissionUnicast: addressed to a single device
SourceIEEE Registration Authority
Address capacity is the size of this registered block, not a count of devices actually manufactured or online. Registration identifies the organization holding the block, not a specific device model or unit.
Curious how a prefix like this turns into a full address? See how MAC addresses are structured →
Ownership timeline
- Oct 24, 2001 – Oct 12, 2016 AT&T Fixed Wireless Services name changedaddress changed
- Oct 12, 2016 – present AT&T
Example addresses in this block
Where this block sits
Previous
00:07:1B:00:00:00 /24
CDVI Americas Ltd
Next
00:07:1D:00:00:00 /24
Satelsa Sistemas Y Aplicaciones De Telecomunicaciones, S.A.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
AT&T holds 6 registered blocks in the IEEE registry, ranking #471 of 33,427 organizations by block count.
Other blocks registered to AT&T