Which company owns MAC address prefix 34:E1:D7?

MAC address prefix 34:E1:D7 is registered to NXP Semiconductors Taiwan Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 34:E1:D7 has a network interface built by NXP Semiconductors Taiwan Ltd..

What is the OUI 34:E1:D7?

34:E1:D7 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to NXP Semiconductors Taiwan Ltd.. It covers every address from 34:E1:D7:00:00:00 to 34:E1:D7:FF:FF:FF, or 16,777,216 addresses in total. It is also written 34-E1-D7.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 34:E1:D7:00:00:00 that is 34:E1:D7 — 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 NXP Semiconductors Taiwan Ltd. located?

NXP Semiconductors Taiwan Ltd. is listed at No. 10, Jing 5th Rd., Nanzi Dist., Kaohsiung City 811643, Taiwan Nanzi Dist. Kaohsiung TW 811643 in the IEEE OUI registry entry for 34:E1:D7. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does NXP Semiconductors Taiwan Ltd. own?

NXP Semiconductors Taiwan Ltd. holds 16 OUI prefixes in the IEEE registry, of which 34:E1:D7 is one. A device made by NXP Semiconductors Taiwan Ltd. could carry a MAC address from any of them.

NXP Semiconductors Taiwan Ltd.

MAC address prefix 34:E1:D7 is registered to NXP Semiconductors Taiwan Ltd. in the IEEE OUI registry. Any device whose MAC address begins with 34:E1:D7 has a network interface built by NXP Semiconductors Taiwan Ltd.. 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 34:E1:D7:00:00:00 to 34:E1:D7:FF:FF:FF.

OUI prefix: 34:E1:D7
Hyphen form: 34-E1-D7
MAC range: 34:E1:D7:00:00:00 – 34:E1:D7:FF:FF:FF
Addresses in block: 16,777,216
Organization: NXP Semiconductors Taiwan Ltd.
Address: No. 10, Jing 5th Rd., Nanzi Dist., Kaohsiung City 811643, Taiwan Nanzi Dist. Kaohsiung TW 811643
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 NXP Semiconductors Taiwan Ltd.

NXP Semiconductors Taiwan Ltd. holds 16 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

Assignment history (2)

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

2026-01-08Assigned to "NXP Semiconductors Taiwan Ltd."
archived source →
2026-07-17Assigned to "NXP Semiconductors Taiwan Ltd."

Nearby in the registry

The prefixes assigned immediately before and after 34:E1:D7:

FAQ

Which company owns MAC address prefix 34:E1:D7?: MAC address prefix 34:E1:D7 is registered to NXP Semiconductors Taiwan Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 34:E1:D7 has a network interface built by NXP Semiconductors Taiwan Ltd..
What is the OUI 34:E1:D7?: 34:E1:D7 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to NXP Semiconductors Taiwan Ltd.. It covers every address from 34:E1:D7:00:00:00 to 34:E1:D7:FF:FF:FF, or 16,777,216 addresses in total. It is also written 34-E1-D7.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 34:E1:D7:00:00:00 that is 34:E1:D7 — 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 NXP Semiconductors Taiwan Ltd. located?: NXP Semiconductors Taiwan Ltd. is listed at No. 10, Jing 5th Rd., Nanzi Dist., Kaohsiung City 811643, Taiwan Nanzi Dist. Kaohsiung TW 811643 in the IEEE OUI registry entry for 34:E1:D7. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does NXP Semiconductors Taiwan Ltd. own?: NXP Semiconductors Taiwan Ltd. holds 16 OUI prefixes in the IEEE registry, of which 34:E1:D7 is one. A device made by NXP Semiconductors Taiwan Ltd. could carry a MAC address from any of them.