Which company owns MAC address prefix 44:87:23?

MAC address prefix 44:87:23 is registered to HOYA SERVICE CORPORATION in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 44:87:23 has a network interface built by HOYA SERVICE CORPORATION.

What is the OUI 44:87:23?

44:87:23 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to HOYA SERVICE CORPORATION. It covers every address from 44:87:23:00:00:00 to 44:87:23:FF:FF:FF, or 16,777,216 addresses in total. It is also written 44-87-23.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 44:87:23:00:00:00 that is 44:87:23 — 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 HOYA SERVICE CORPORATION located?

HOYA SERVICE CORPORATION is listed at 4-10-2 Nakano Nakano-ku Tokyo JP 164-8545 in the IEEE OUI registry entry for 44:87:23. This is the address the organization registered with the IEEE, which may differ from its current operating address.

HOYA SERVICE CORPORATION

MAC address prefix 44:87:23 is registered to HOYA SERVICE CORPORATION in the IEEE OUI registry. Any device whose MAC address begins with 44:87:23 has a network interface built by HOYA SERVICE CORPORATION. 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 44:87:23:00:00:00 to 44:87:23:FF:FF:FF.

OUI prefix: 44:87:23
Hyphen form: 44-87-23
MAC range: 44:87:23:00:00:00 – 44:87:23:FF:FF:FF
Addresses in block: 16,777,216
Organization: HOYA SERVICE CORPORATION
Address: 4-10-2 Nakano Nakano-ku Tokyo JP 164-8545
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 "HOYA SERVICE CORPORATION"
archived source →
2026-07-17Assigned to "HOYA SERVICE CORPORATION"

Nearby in the registry

The prefixes assigned immediately before and after 44:87:23:

FAQ

Which company owns MAC address prefix 44:87:23?: MAC address prefix 44:87:23 is registered to HOYA SERVICE CORPORATION in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 44:87:23 has a network interface built by HOYA SERVICE CORPORATION.
What is the OUI 44:87:23?: 44:87:23 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to HOYA SERVICE CORPORATION. It covers every address from 44:87:23:00:00:00 to 44:87:23:FF:FF:FF, or 16,777,216 addresses in total. It is also written 44-87-23.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 44:87:23:00:00:00 that is 44:87:23 — 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 HOYA SERVICE CORPORATION located?: HOYA SERVICE CORPORATION is listed at 4-10-2 Nakano Nakano-ku Tokyo JP 164-8545 in the IEEE OUI registry entry for 44:87:23. This is the address the organization registered with the IEEE, which may differ from its current operating address.