MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix10:63:A3:10:00:00 /28
Vendor address7765 Old Telegraph Road Severn MD US 21144
Country🇺🇸 United States
RegisteredApr 5, 2024
Block range10:63:A3:10:00:00– 10:63:A3:1F:FF:FF
Address capacity1,048,576
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 →
Example addresses in this block
Where this block sits
Previous
10:63:A3:00:00:00 /28
Changsha Sunvote Limited
Next
10:63:A3:20:00:00 /28
Sichuan Puhui Zhida Communication Equipment Co. Ltd.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Jacobs Technology, Inc. holds 2 registered blocks in the IEEE registry, ranking #2,318 of 33,427 organizations by block count.
Other blocks registered to Jacobs Technology, Inc.