Which company owns MAC address prefix 2C:D1:DA?

MAC address prefix 2C:D1:DA is registered to Keysight Technologies, Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 2C:D1:DA has a network interface built by Keysight Technologies, Inc..

What is the OUI 2C:D1:DA?

2C:D1:DA is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Keysight Technologies, Inc.. It covers every address from 2C:D1:DA:00:00:00 to 2C:D1:DA:FF:FF:FF, or 16,777,216 addresses in total. It is also written 2C-D1-DA.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 2C:D1:DA:00:00:00 that is 2C:D1:DA — 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 Keysight Technologies, Inc. located?

Keysight Technologies, Inc. is listed at 2800 Woodlawn Drive, #271 Honolulu Hawaii US 96822 in the IEEE OUI registry entry for 2C:D1:DA. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does Keysight Technologies, Inc. own?

Keysight Technologies, Inc. holds 4 OUI prefixes in the IEEE registry, of which 2C:D1:DA is one. A device made by Keysight Technologies, Inc. could carry a MAC address from any of them.

Keysight Technologies, Inc.

MAC address prefix 2C:D1:DA is registered to Keysight Technologies, Inc. in the IEEE OUI registry. Any device whose MAC address begins with 2C:D1:DA has a network interface built by Keysight Technologies, 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 2C:D1:DA:00:00:00 to 2C:D1:DA:FF:FF:FF.

OUI prefix: 2C:D1:DA
Hyphen form: 2C-D1-DA
MAC range: 2C:D1:DA:00:00:00 – 2C:D1:DA:FF:FF:FF
Addresses in block: 16,777,216
Organization: Keysight Technologies, Inc.
Address: 2800 Woodlawn Drive, #271 Honolulu Hawaii US 96822
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 Keysight Technologies, Inc.

Keysight Technologies, Inc. holds 4 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

Assignment history (3)

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 "Sanjole, Inc."
archived source →
2022-07-11Renamed from "Sanjole, Inc." to "Keysight Technologies, Inc."
archived source →
2026-07-17Assigned to "Keysight Technologies, Inc."

Nearby in the registry

The prefixes assigned immediately before and after 2C:D1:DA:

FAQ

Which company owns MAC address prefix 2C:D1:DA?: MAC address prefix 2C:D1:DA is registered to Keysight Technologies, Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 2C:D1:DA has a network interface built by Keysight Technologies, Inc..
What is the OUI 2C:D1:DA?: 2C:D1:DA is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Keysight Technologies, Inc.. It covers every address from 2C:D1:DA:00:00:00 to 2C:D1:DA:FF:FF:FF, or 16,777,216 addresses in total. It is also written 2C-D1-DA.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 2C:D1:DA:00:00:00 that is 2C:D1:DA — 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 Keysight Technologies, Inc. located?: Keysight Technologies, Inc. is listed at 2800 Woodlawn Drive, #271 Honolulu Hawaii US 96822 in the IEEE OUI registry entry for 2C:D1:DA. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does Keysight Technologies, Inc. own?: Keysight Technologies, Inc. holds 4 OUI prefixes in the IEEE registry, of which 2C:D1:DA is one. A device made by Keysight Technologies, Inc. could carry a MAC address from any of them.