Which company owns MAC address prefix 88:70:EF?

MAC address prefix 88:70:EF is registered to SC Professional Trading Co., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 88:70:EF has a network interface built by SC Professional Trading Co., Ltd..

What is the OUI 88:70:EF?

88:70:EF is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to SC Professional Trading Co., Ltd.. It covers every address from 88:70:EF:00:00:00 to 88:70:EF:FF:FF:FF, or 16,777,216 addresses in total. It is also written 88-70-EF.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 88:70:EF:00:00:00 that is 88:70:EF — 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 SC Professional Trading Co., Ltd. located?

SC Professional Trading Co., Ltd. is listed at 2 Soi Krungthepkreetar 21 Sapansoong Bangkok TH 10250 in the IEEE OUI registry entry for 88:70:EF. This is the address the organization registered with the IEEE, which may differ from its current operating address.

SC Professional Trading Co., Ltd.

MAC address prefix 88:70:EF is registered to SC Professional Trading Co., Ltd. in the IEEE OUI registry. Any device whose MAC address begins with 88:70:EF has a network interface built by SC Professional Trading 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 88:70:EF:00:00:00 to 88:70:EF:FF:FF:FF.

OUI prefix: 88:70:EF
Hyphen form: 88-70-EF
MAC range: 88:70:EF:00:00:00 – 88:70:EF:FF:FF:FF
Addresses in block: 16,777,216
Organization: SC Professional Trading Co., Ltd.
Address: 2 Soi Krungthepkreetar 21 Sapansoong Bangkok TH 10250
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 "SC Professional Trading Co., Ltd."
archived source →
2026-07-17Assigned to "SC Professional Trading Co., Ltd."

Nearby in the registry

The prefixes assigned immediately before and after 88:70:EF:

FAQ

Which company owns MAC address prefix 88:70:EF?: MAC address prefix 88:70:EF is registered to SC Professional Trading Co., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 88:70:EF has a network interface built by SC Professional Trading Co., Ltd..
What is the OUI 88:70:EF?: 88:70:EF is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to SC Professional Trading Co., Ltd.. It covers every address from 88:70:EF:00:00:00 to 88:70:EF:FF:FF:FF, or 16,777,216 addresses in total. It is also written 88-70-EF.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 88:70:EF:00:00:00 that is 88:70:EF — 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 SC Professional Trading Co., Ltd. located?: SC Professional Trading Co., Ltd. is listed at 2 Soi Krungthepkreetar 21 Sapansoong Bangkok TH 10250 in the IEEE OUI registry entry for 88:70:EF. This is the address the organization registered with the IEEE, which may differ from its current operating address.