Which company owns MAC address prefix 88:89:64?

MAC address prefix 88:89:64 is registered to GSI Electronics Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 88:89:64 has a network interface built by GSI Electronics Inc..

What is the OUI 88:89:64?

88:89:64 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to GSI Electronics Inc.. It covers every address from 88:89:64:00:00:00 to 88:89:64:FF:FF:FF, or 16,777,216 addresses in total. It is also written 88-89-64.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 88:89:64:00:00:00 that is 88:89:64 — 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 GSI Electronics Inc. located?

GSI Electronics Inc. is listed at 5200 Armand-Frappier St-Hubert Quebec CA J3Z 1G5 in the IEEE OUI registry entry for 88:89:64. This is the address the organization registered with the IEEE, which may differ from its current operating address.

GSI Electronics Inc.

MAC address prefix 88:89:64 is registered to GSI Electronics Inc. in the IEEE OUI registry. Any device whose MAC address begins with 88:89:64 has a network interface built by GSI Electronics 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 88:89:64:00:00:00 to 88:89:64:FF:FF:FF.

OUI prefix: 88:89:64
Hyphen form: 88-89-64
MAC range: 88:89:64:00:00:00 – 88:89:64:FF:FF:FF
Addresses in block: 16,777,216
Organization: GSI Electronics Inc.
Address: 5200 Armand-Frappier St-Hubert Quebec CA J3Z 1G5
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 "GSI Electronics Inc."
archived source →
2026-07-17Assigned to "GSI Electronics Inc."

Nearby in the registry

The prefixes assigned immediately before and after 88:89:64:

FAQ

Which company owns MAC address prefix 88:89:64?: MAC address prefix 88:89:64 is registered to GSI Electronics Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 88:89:64 has a network interface built by GSI Electronics Inc..
What is the OUI 88:89:64?: 88:89:64 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to GSI Electronics Inc.. It covers every address from 88:89:64:00:00:00 to 88:89:64:FF:FF:FF, or 16,777,216 addresses in total. It is also written 88-89-64.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 88:89:64:00:00:00 that is 88:89:64 — 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 GSI Electronics Inc. located?: GSI Electronics Inc. is listed at 5200 Armand-Frappier St-Hubert Quebec CA J3Z 1G5 in the IEEE OUI registry entry for 88:89:64. This is the address the organization registered with the IEEE, which may differ from its current operating address.