Which company owns MAC address prefix C8:E7:76?

MAC address prefix C8:E7:76 is registered to PTCOM Technology in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C8:E7:76 has a network interface built by PTCOM Technology.

What is the OUI C8:E7:76?

C8:E7:76 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to PTCOM Technology. It covers every address from C8:E7:76:00:00:00 to C8:E7:76:FF:FF:FF, or 16,777,216 addresses in total. It is also written C8-E7-76.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in C8:E7:76:00:00:00 that is C8:E7:76 — 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 PTCOM Technology located?

PTCOM Technology is listed at NO.189-8, SEC. 3, NANJING E. RD., ZHONGSHAN DIST. Taipei TW 10488 in the IEEE OUI registry entry for C8:E7:76. This is the address the organization registered with the IEEE, which may differ from its current operating address.

PTCOM Technology

MAC address prefix C8:E7:76 is registered to PTCOM Technology in the IEEE OUI registry. Any device whose MAC address begins with C8:E7:76 has a network interface built by PTCOM Technology. 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 C8:E7:76:00:00:00 to C8:E7:76:FF:FF:FF.

OUI prefix: C8:E7:76
Hyphen form: C8-E7-76
MAC range: C8:E7:76:00:00:00 – C8:E7:76:FF:FF:FF
Addresses in block: 16,777,216
Organization: PTCOM Technology
Address: NO.189-8, SEC. 3, NANJING E. RD., ZHONGSHAN DIST. Taipei TW 10488
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.

2016-07-29Assigned to "PTCOM Technology"
archived source →
2026-07-17Assigned to "PTCOM Technology"

Nearby in the registry

The prefixes assigned immediately before and after C8:E7:76:

FAQ

Which company owns MAC address prefix C8:E7:76?: MAC address prefix C8:E7:76 is registered to PTCOM Technology in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C8:E7:76 has a network interface built by PTCOM Technology.
What is the OUI C8:E7:76?: C8:E7:76 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to PTCOM Technology. It covers every address from C8:E7:76:00:00:00 to C8:E7:76:FF:FF:FF, or 16,777,216 addresses in total. It is also written C8-E7-76.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in C8:E7:76:00:00:00 that is C8:E7:76 — 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 PTCOM Technology located?: PTCOM Technology is listed at NO.189-8, SEC. 3, NANJING E. RD., ZHONGSHAN DIST. Taipei TW 10488 in the IEEE OUI registry entry for C8:E7:76. This is the address the organization registered with the IEEE, which may differ from its current operating address.