Which company owns MAC address prefix 00:17:A5?

MAC address prefix 00:17:A5 is registered to MediaTek Inc in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:17:A5 has a network interface built by MediaTek Inc.

What is the OUI 00:17:A5?

00:17:A5 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to MediaTek Inc. It covers every address from 00:17:A5:00:00:00 to 00:17:A5:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-17-A5.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 00:17:A5:00:00:00 that is 00:17:A5 — 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 MediaTek Inc located?

MediaTek Inc is listed at No. 1, Dusing 1st Rd. , Hsinchu Science Park Hsin-Chu Science Park Hsin-chu City TW 200 in the IEEE OUI registry entry for 00:17:A5. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does MediaTek Inc own?

MediaTek Inc holds 4 OUI prefixes in the IEEE registry, of which 00:17:A5 is one. A device made by MediaTek Inc could carry a MAC address from any of them.

MediaTek Inc

MAC address prefix 00:17:A5 is registered to MediaTek Inc in the IEEE OUI registry. Any device whose MAC address begins with 00:17:A5 has a network interface built by MediaTek 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 00:17:A5:00:00:00 to 00:17:A5:FF:FF:FF.

OUI prefix: 00:17:A5
Hyphen form: 00-17-A5
MAC range: 00:17:A5:00:00:00 – 00:17:A5:FF:FF:FF
Addresses in block: 16,777,216
Organization: MediaTek Inc
Address: No. 1, Dusing 1st Rd. , Hsinchu Science Park Hsin-Chu Science Park Hsin-chu City TW 200
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 MediaTek Inc

MediaTek 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 "Ralink Technology Corp"
archived source →
2025-02-27Renamed from "Ralink Technology Corp" to "MediaTek Inc"
archived source →
2026-07-17Assigned to "MediaTek Inc"

Nearby in the registry

The prefixes assigned immediately before and after 00:17:A5:

FAQ

Which company owns MAC address prefix 00:17:A5?: MAC address prefix 00:17:A5 is registered to MediaTek Inc in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:17:A5 has a network interface built by MediaTek Inc.
What is the OUI 00:17:A5?: 00:17:A5 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to MediaTek Inc. It covers every address from 00:17:A5:00:00:00 to 00:17:A5:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-17-A5.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 00:17:A5:00:00:00 that is 00:17:A5 — 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 MediaTek Inc located?: MediaTek Inc is listed at No. 1, Dusing 1st Rd. , Hsinchu Science Park Hsin-Chu Science Park Hsin-chu City TW 200 in the IEEE OUI registry entry for 00:17:A5. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does MediaTek Inc own?: MediaTek Inc holds 4 OUI prefixes in the IEEE registry, of which 00:17:A5 is one. A device made by MediaTek Inc could carry a MAC address from any of them.