Which company owns MAC address prefix 14:7D:B3?

MAC address prefix 14:7D:B3 is registered to JOA TELECOM.CO.,LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 14:7D:B3 has a network interface built by JOA TELECOM.CO.,LTD.

What is the OUI 14:7D:B3?

14:7D:B3 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to JOA TELECOM.CO.,LTD. It covers every address from 14:7D:B3:00:00:00 to 14:7D:B3:FF:FF:FF, or 16,777,216 addresses in total. It is also written 14-7D-B3.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 14:7D:B3:00:00:00 that is 14:7D:B3 — 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 JOA TELECOM.CO.,LTD located?

JOA TELECOM.CO.,LTD is listed at 1007,Sicox tower,513-14,Sangdaewon-dong,Jungwon-gu Seongnam-si Gyeonggi-do KR 462-806 in the IEEE OUI registry entry for 14:7D:B3. This is the address the organization registered with the IEEE, which may differ from its current operating address.

JOA TELECOM.CO.,LTD

MAC address prefix 14:7D:B3 is registered to JOA TELECOM.CO.,LTD in the IEEE OUI registry. Any device whose MAC address begins with 14:7D:B3 has a network interface built by JOA TELECOM.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 14:7D:B3:00:00:00 to 14:7D:B3:FF:FF:FF.

OUI prefix: 14:7D:B3
Hyphen form: 14-7D-B3
MAC range: 14:7D:B3:00:00:00 – 14:7D:B3:FF:FF:FF
Addresses in block: 16,777,216
Organization: JOA TELECOM.CO.,LTD
Address: 1007,Sicox tower,513-14,Sangdaewon-dong,Jungwon-gu Seongnam-si Gyeonggi-do KR 462-806
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 "JOA TELECOM.CO.,LTD"
archived source →
2026-07-17Assigned to "JOA TELECOM.CO.,LTD"

Nearby in the registry

The prefixes assigned immediately before and after 14:7D:B3:

FAQ

Which company owns MAC address prefix 14:7D:B3?: MAC address prefix 14:7D:B3 is registered to JOA TELECOM.CO.,LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 14:7D:B3 has a network interface built by JOA TELECOM.CO.,LTD.
What is the OUI 14:7D:B3?: 14:7D:B3 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to JOA TELECOM.CO.,LTD. It covers every address from 14:7D:B3:00:00:00 to 14:7D:B3:FF:FF:FF, or 16,777,216 addresses in total. It is also written 14-7D-B3.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 14:7D:B3:00:00:00 that is 14:7D:B3 — 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 JOA TELECOM.CO.,LTD located?: JOA TELECOM.CO.,LTD is listed at 1007,Sicox tower,513-14,Sangdaewon-dong,Jungwon-gu Seongnam-si Gyeonggi-do KR 462-806 in the IEEE OUI registry entry for 14:7D:B3. This is the address the organization registered with the IEEE, which may differ from its current operating address.