Which company owns MAC address prefix 10:49:63?

MAC address prefix 10:49:63 is registered to HARTING K.K. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 10:49:63 has a network interface built by HARTING K.K..

What is the OUI 10:49:63?

10:49:63 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to HARTING K.K.. It covers every address from 10:49:63:00:00:00 to 10:49:63:FF:FF:FF, or 16,777,216 addresses in total. It is also written 10-49-63.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 10:49:63:00:00:00 that is 10:49:63 — 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 HARTING K.K. located?

HARTING K.K. is listed at 1-7-9, Shin-Yokohama, Kohoku-ku Yokohama-city Kanagawa JP 222-0033 in the IEEE OUI registry entry for 10:49:63. This is the address the organization registered with the IEEE, which may differ from its current operating address.

HARTING K.K.

MAC address prefix 10:49:63 is registered to HARTING K.K. in the IEEE OUI registry. Any device whose MAC address begins with 10:49:63 has a network interface built by HARTING K.K.. 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 10:49:63:00:00:00 to 10:49:63:FF:FF:FF.

OUI prefix: 10:49:63
Hyphen form: 10-49-63
MAC range: 10:49:63:00:00:00 – 10:49:63:FF:FF:FF
Addresses in block: 16,777,216
Organization: HARTING K.K.
Address: 1-7-9, Shin-Yokohama, Kohoku-ku Yokohama-city Kanagawa JP 222-0033
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.

2017-09-08Assigned to "HARTING K.K."
archived source →
2026-07-17Assigned to "HARTING K.K."

Nearby in the registry

The prefixes assigned immediately before and after 10:49:63:

FAQ

Which company owns MAC address prefix 10:49:63?: MAC address prefix 10:49:63 is registered to HARTING K.K. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 10:49:63 has a network interface built by HARTING K.K..
What is the OUI 10:49:63?: 10:49:63 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to HARTING K.K.. It covers every address from 10:49:63:00:00:00 to 10:49:63:FF:FF:FF, or 16,777,216 addresses in total. It is also written 10-49-63.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 10:49:63:00:00:00 that is 10:49:63 — 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 HARTING K.K. located?: HARTING K.K. is listed at 1-7-9, Shin-Yokohama, Kohoku-ku Yokohama-city Kanagawa JP 222-0033 in the IEEE OUI registry entry for 10:49:63. This is the address the organization registered with the IEEE, which may differ from its current operating address.