Which company owns MAC address prefix 88:98:21?

MAC address prefix 88:98:21 is registered to TERAON in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 88:98:21 has a network interface built by TERAON.

What is the OUI 88:98:21?

88:98:21 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to TERAON. It covers every address from 88:98:21:00:00:00 to 88:98:21:FF:FF:FF, or 16,777,216 addresses in total. It is also written 88-98-21.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 88:98:21:00:00:00 that is 88:98:21 — 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 TERAON located?

TERAON is listed at 2F Seohan Bldg., 1552-10, Seocho-Dong, Seocho-Gu, Seoul KR 137-070 in the IEEE OUI registry entry for 88:98:21. This is the address the organization registered with the IEEE, which may differ from its current operating address.

TERAON

MAC address prefix 88:98:21 is registered to TERAON in the IEEE OUI registry. Any device whose MAC address begins with 88:98:21 has a network interface built by TERAON. 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 88:98:21:00:00:00 to 88:98:21:FF:FF:FF.

OUI prefix: 88:98:21
Hyphen form: 88-98-21
MAC range: 88:98:21:00:00:00 – 88:98:21:FF:FF:FF
Addresses in block: 16,777,216
Organization: TERAON
Address: 2F Seohan Bldg., 1552-10, Seocho-Dong, Seocho-Gu, Seoul KR 137-070
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 "TERAON"
archived source →
2026-07-17Assigned to "TERAON"

Nearby in the registry

The prefixes assigned immediately before and after 88:98:21:

FAQ

Which company owns MAC address prefix 88:98:21?: MAC address prefix 88:98:21 is registered to TERAON in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 88:98:21 has a network interface built by TERAON.
What is the OUI 88:98:21?: 88:98:21 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to TERAON. It covers every address from 88:98:21:00:00:00 to 88:98:21:FF:FF:FF, or 16,777,216 addresses in total. It is also written 88-98-21.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 88:98:21:00:00:00 that is 88:98:21 — 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 TERAON located?: TERAON is listed at 2F Seohan Bldg., 1552-10, Seocho-Dong, Seocho-Gu, Seoul KR 137-070 in the IEEE OUI registry entry for 88:98:21. This is the address the organization registered with the IEEE, which may differ from its current operating address.