Which company owns MAC address prefix CC:7A:30?

MAC address prefix CC:7A:30 is registered to CMAX Wireless Co., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with CC:7A:30 has a network interface built by CMAX Wireless Co., Ltd..

What is the OUI CC:7A:30?

CC:7A:30 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to CMAX Wireless Co., Ltd.. It covers every address from CC:7A:30:00:00:00 to CC:7A:30:FF:FF:FF, or 16,777,216 addresses in total. It is also written CC-7A-30.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in CC:7A:30:00:00:00 that is CC:7A:30 — 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 CMAX Wireless Co., Ltd. located?

CMAX Wireless Co., Ltd. is listed at KT Bongduk B/D 9F, 627-15, Bongduk-dong Namgu Daegu KR 705710 in the IEEE OUI registry entry for CC:7A:30. This is the address the organization registered with the IEEE, which may differ from its current operating address.

CMAX Wireless Co., Ltd.

MAC address prefix CC:7A:30 is registered to CMAX Wireless Co., Ltd. in the IEEE OUI registry. Any device whose MAC address begins with CC:7A:30 has a network interface built by CMAX Wireless Co., 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 CC:7A:30:00:00:00 to CC:7A:30:FF:FF:FF.

OUI prefix: CC:7A:30
Hyphen form: CC-7A-30
MAC range: CC:7A:30:00:00:00 – CC:7A:30:FF:FF:FF
Addresses in block: 16,777,216
Organization: CMAX Wireless Co., Ltd.
Address: KT Bongduk B/D 9F, 627-15, Bongduk-dong Namgu Daegu KR 705710
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 "CMAX Wireless Co., Ltd."
archived source →
2026-07-17Assigned to "CMAX Wireless Co., Ltd."

Nearby in the registry

The prefixes assigned immediately before and after CC:7A:30:

FAQ

Which company owns MAC address prefix CC:7A:30?: MAC address prefix CC:7A:30 is registered to CMAX Wireless Co., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with CC:7A:30 has a network interface built by CMAX Wireless Co., Ltd..
What is the OUI CC:7A:30?: CC:7A:30 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to CMAX Wireless Co., Ltd.. It covers every address from CC:7A:30:00:00:00 to CC:7A:30:FF:FF:FF, or 16,777,216 addresses in total. It is also written CC-7A-30.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in CC:7A:30:00:00:00 that is CC:7A:30 — 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 CMAX Wireless Co., Ltd. located?: CMAX Wireless Co., Ltd. is listed at KT Bongduk B/D 9F, 627-15, Bongduk-dong Namgu Daegu KR 705710 in the IEEE OUI registry entry for CC:7A:30. This is the address the organization registered with the IEEE, which may differ from its current operating address.