Which company owns MAC address prefix 38:01:18?

MAC address prefix 38:01:18 is registered to ULVAC,Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 38:01:18 has a network interface built by ULVAC,Inc..

What is the OUI 38:01:18?

38:01:18 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ULVAC,Inc.. It covers every address from 38:01:18:00:00:00 to 38:01:18:FF:FF:FF, or 16,777,216 addresses in total. It is also written 38-01-18.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 38:01:18:00:00:00 that is 38:01:18 — 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 ULVAC,Inc. located?

ULVAC,Inc. is listed at 2500 Hagizono Chigasaki Kanagawa JP 253-8543 in the IEEE OUI registry entry for 38:01:18. This is the address the organization registered with the IEEE, which may differ from its current operating address.

ULVAC,Inc.

MAC address prefix 38:01:18 is registered to ULVAC,Inc. in the IEEE OUI registry. Any device whose MAC address begins with 38:01:18 has a network interface built by ULVAC,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 38:01:18:00:00:00 to 38:01:18:FF:FF:FF.

OUI prefix: 38:01:18
Hyphen form: 38-01-18
MAC range: 38:01:18:00:00:00 – 38:01:18:FF:FF:FF
Addresses in block: 16,777,216
Organization: ULVAC,Inc.
Address: 2500 Hagizono Chigasaki Kanagawa JP 253-8543
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.

2019-07-04Assigned to "ULVAC,Inc."
archived source →
2026-07-17Assigned to "ULVAC,Inc."

Nearby in the registry

The prefixes assigned immediately before and after 38:01:18:

FAQ

Which company owns MAC address prefix 38:01:18?: MAC address prefix 38:01:18 is registered to ULVAC,Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 38:01:18 has a network interface built by ULVAC,Inc..
What is the OUI 38:01:18?: 38:01:18 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ULVAC,Inc.. It covers every address from 38:01:18:00:00:00 to 38:01:18:FF:FF:FF, or 16,777,216 addresses in total. It is also written 38-01-18.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 38:01:18:00:00:00 that is 38:01:18 — 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 ULVAC,Inc. located?: ULVAC,Inc. is listed at 2500 Hagizono Chigasaki Kanagawa JP 253-8543 in the IEEE OUI registry entry for 38:01:18. This is the address the organization registered with the IEEE, which may differ from its current operating address.