Which company owns MAC address prefix 7C:BF:77?

MAC address prefix 7C:BF:77 is registered to SPEEDTECH CORP. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 7C:BF:77 has a network interface built by SPEEDTECH CORP..

What is the OUI 7C:BF:77?

7C:BF:77 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to SPEEDTECH CORP.. It covers every address from 7C:BF:77:00:00:00 to 7C:BF:77:FF:FF:FF, or 16,777,216 addresses in total. It is also written 7C-BF-77.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 7C:BF:77:00:00:00 that is 7C:BF:77 — 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 SPEEDTECH CORP. located?

SPEEDTECH CORP. is listed at No. 568, Sec. 1, Minsheng N. Rd., Guishan Dist., Taoyuan City 338, Taiwan Taoyuan TW 338 in the IEEE OUI registry entry for 7C:BF:77. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does SPEEDTECH CORP. own?

SPEEDTECH CORP. holds 2 OUI prefixes in the IEEE registry, of which 7C:BF:77 is one. A device made by SPEEDTECH CORP. could carry a MAC address from any of them.

SPEEDTECH CORP.

MAC address prefix 7C:BF:77 is registered to SPEEDTECH CORP. in the IEEE OUI registry. Any device whose MAC address begins with 7C:BF:77 has a network interface built by SPEEDTECH CORP.. 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 7C:BF:77:00:00:00 to 7C:BF:77:FF:FF:FF.

OUI prefix: 7C:BF:77
Hyphen form: 7C-BF-77
MAC range: 7C:BF:77:00:00:00 – 7C:BF:77:FF:FF:FF
Addresses in block: 16,777,216
Organization: SPEEDTECH CORP.
Address: No. 568, Sec. 1, Minsheng N. Rd., Guishan Dist., Taoyuan City 338, Taiwan Taoyuan TW 338
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 SPEEDTECH CORP.

SPEEDTECH CORP. holds 2 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

D8:23:E0

Assignment history (4)

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

2023-07-11Assigned to "SPEEDTECH CORP."
archived source →
2024-11-20Renamed from "SPEEDTECH CORP." to "SPEEDTECH CORP. JIO"
archived source →
2025-02-27Renamed from "SPEEDTECH CORP. JIO" to "SPEEDTECH CORP."
archived source →
2026-07-17Assigned to "SPEEDTECH CORP."

Nearby in the registry

The prefixes assigned immediately before and after 7C:BF:77:

FAQ

Which company owns MAC address prefix 7C:BF:77?: MAC address prefix 7C:BF:77 is registered to SPEEDTECH CORP. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 7C:BF:77 has a network interface built by SPEEDTECH CORP..
What is the OUI 7C:BF:77?: 7C:BF:77 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to SPEEDTECH CORP.. It covers every address from 7C:BF:77:00:00:00 to 7C:BF:77:FF:FF:FF, or 16,777,216 addresses in total. It is also written 7C-BF-77.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 7C:BF:77:00:00:00 that is 7C:BF:77 — 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 SPEEDTECH CORP. located?: SPEEDTECH CORP. is listed at No. 568, Sec. 1, Minsheng N. Rd., Guishan Dist., Taoyuan City 338, Taiwan Taoyuan TW 338 in the IEEE OUI registry entry for 7C:BF:77. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does SPEEDTECH CORP. own?: SPEEDTECH CORP. holds 2 OUI prefixes in the IEEE registry, of which 7C:BF:77 is one. A device made by SPEEDTECH CORP. could carry a MAC address from any of them.