Which company owns MAC address prefix 28:48:46?

MAC address prefix 28:48:46 is registered to GridCentric Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 28:48:46 has a network interface built by GridCentric Inc..

What is the OUI 28:48:46?

28:48:46 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to GridCentric Inc.. It covers every address from 28:48:46:00:00:00 to 28:48:46:FF:FF:FF, or 16,777,216 addresses in total. It is also written 28-48-46.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 28:48:46:00:00:00 that is 28:48:46 — and look that prefix up in the IEEE OUI registry. If the second-lowest bit of the first octet is set, the address is locally administered (a randomized or private MAC), which belongs to no manufacturer and will not resolve; modern phones and laptops use these by default on each network.

Where is GridCentric Inc. located?

GridCentric Inc. is listed at 350 Bloor St. E Toronto Ontario CA M4W 0A1 in the IEEE OUI registry entry for 28:48:46. This is the address the organization registered with the IEEE, which may differ from its current operating address.

GridCentric Inc.

MAC address prefix 28:48:46 is registered to GridCentric Inc. in the IEEE OUI registry. Any device whose MAC address begins with 28:48:46 has a network interface built by GridCentric Inc.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address — it covers every MAC from 28:48:46:00:00:00 to 28:48:46:FF:FF:FF.

OUI prefix: 28:48:46
Hyphen form: 28-48-46
MAC range: 28:48:46:00:00:00 – 28:48:46:FF:FF:FF
Addresses in block: 16,777,216
Organization: GridCentric Inc.
Address: 350 Bloor St. E Toronto Ontario CA M4W 0A1
Source: IEEE OUI registry

Have a full MAC address? Look it up— we'll also tell you if it's a randomized (private) address rather than a real manufacturer prefix.

Assignment history (2)

The IEEE registry publishes current state only — this is the change record we've kept since we started tracking it daily.

2016-07-29Assigned to "GridCentric Inc."
archived source →
2026-07-17Assigned to "GridCentric Inc."

Nearby in the registry

The prefixes assigned immediately before and after 28:48:46:

FAQ

Which company owns MAC address prefix 28:48:46?: MAC address prefix 28:48:46 is registered to GridCentric Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 28:48:46 has a network interface built by GridCentric Inc..
What is the OUI 28:48:46?: 28:48:46 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to GridCentric Inc.. It covers every address from 28:48:46:00:00:00 to 28:48:46:FF:FF:FF, or 16,777,216 addresses in total. It is also written 28-48-46.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 28:48:46:00:00:00 that is 28:48:46 — and look that prefix up in the IEEE OUI registry. If the second-lowest bit of the first octet is set, the address is locally administered (a randomized or private MAC), which belongs to no manufacturer and will not resolve; modern phones and laptops use these by default on each network.
Where is GridCentric Inc. located?: GridCentric Inc. is listed at 350 Bloor St. E Toronto Ontario CA M4W 0A1 in the IEEE OUI registry entry for 28:48:46. This is the address the organization registered with the IEEE, which may differ from its current operating address.