Which company owns MAC address prefix B0:D5:87?

MAC address prefix B0:D5:87 is registered to silex technology, Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B0:D5:87 has a network interface built by silex technology, Inc..

What is the OUI B0:D5:87?

B0:D5:87 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to silex technology, Inc.. It covers every address from B0:D5:87:00:00:00 to B0:D5:87:FF:FF:FF, or 16,777,216 addresses in total. It is also written B0-D5-87.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in B0:D5:87:00:00:00 that is B0:D5:87 — 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 silex technology, Inc. located?

silex technology, Inc. is listed at 2-3-1 Hikaridai, Seika-cho, Souraku-gun Kyoto JP 619-0237 in the IEEE OUI registry entry for B0:D5:87. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does silex technology, Inc. own?

silex technology, Inc. holds 3 OUI prefixes in the IEEE registry, of which B0:D5:87 is one. A device made by silex technology, Inc. could carry a MAC address from any of them.

silex technology, Inc.

MAC address prefix B0:D5:87 is registered to silex technology, Inc. in the IEEE OUI registry. Any device whose MAC address begins with B0:D5:87 has a network interface built by silex technology, 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 B0:D5:87:00:00:00 to B0:D5:87:FF:FF:FF.

OUI prefix: B0:D5:87
Hyphen form: B0-D5-87
MAC range: B0:D5:87:00:00:00 – B0:D5:87:FF:FF:FF
Addresses in block: 16,777,216
Organization: silex technology, Inc.
Address: 2-3-1 Hikaridai, Seika-cho, Souraku-gun Kyoto JP 619-0237
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.

Other prefixes from silex technology, Inc.

silex technology, Inc. holds 3 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

Assignment history (1)

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

2026-08-21Assigned to "silex technology, Inc."

Nearby in the registry

The prefixes assigned immediately before and after B0:D5:87:

FAQ

Which company owns MAC address prefix B0:D5:87?: MAC address prefix B0:D5:87 is registered to silex technology, Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B0:D5:87 has a network interface built by silex technology, Inc..
What is the OUI B0:D5:87?: B0:D5:87 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to silex technology, Inc.. It covers every address from B0:D5:87:00:00:00 to B0:D5:87:FF:FF:FF, or 16,777,216 addresses in total. It is also written B0-D5-87.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in B0:D5:87:00:00:00 that is B0:D5:87 — 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 silex technology, Inc. located?: silex technology, Inc. is listed at 2-3-1 Hikaridai, Seika-cho, Souraku-gun Kyoto JP 619-0237 in the IEEE OUI registry entry for B0:D5:87. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does silex technology, Inc. own?: silex technology, Inc. holds 3 OUI prefixes in the IEEE registry, of which B0:D5:87 is one. A device made by silex technology, Inc. could carry a MAC address from any of them.