CaptionCall (48:65:EE:20:00:00 /28)

CaptionCall MA-M

MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.

Prefix48:65:EE:20:00:00 /28

Vendor address4215 Riverboat Road Salt Lake City UT US 84123

Block range48:65:EE:20:00:00– 48:65:EE:2F: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

48:65:EE:20:00:00 48:65:EE:27:FF:FF 48:65:EE:2F:FF:FF

Other blocks registered to CaptionCall

F8:82:00:00:00:00 /24 MA-L