Which company owns MAC address prefix 54:5F:A9?

MAC address prefix 54:5F:A9 is registered to Teracom Limited in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 54:5F:A9 has a network interface built by Teracom Limited.

What is the OUI 54:5F:A9?

54:5F:A9 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Teracom Limited. It covers every address from 54:5F:A9:00:00:00 to 54:5F:A9:FF:FF:FF, or 16,777,216 addresses in total. It is also written 54-5F-A9.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 54:5F:A9:00:00:00 that is 54:5F:A9 — 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 Teracom Limited located?

Teracom Limited is listed at B-84, Sector - 60, Noida Uttar Pradesh IN 201 301 in the IEEE OUI registry entry for 54:5F:A9. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does Teracom Limited own?

Teracom Limited holds 3 OUI prefixes in the IEEE registry, of which 54:5F:A9 is one. A device made by Teracom Limited could carry a MAC address from any of them.

Teracom Limited

MAC address prefix 54:5F:A9 is registered to Teracom Limited in the IEEE OUI registry. Any device whose MAC address begins with 54:5F:A9 has a network interface built by Teracom Limited. 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 54:5F:A9:00:00:00 to 54:5F:A9:FF:FF:FF.

OUI prefix: 54:5F:A9
Hyphen form: 54-5F-A9
MAC range: 54:5F:A9:00:00:00 – 54:5F:A9:FF:FF:FF
Addresses in block: 16,777,216
Organization: Teracom Limited
Address: B-84, Sector - 60, Noida Uttar Pradesh IN 201 301
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.

Other prefixes from Teracom Limited

Teracom Limited holds 3 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

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 "Teracom Limited"
archived source →
2026-07-17Assigned to "Teracom Limited"

Nearby in the registry

The prefixes assigned immediately before and after 54:5F:A9:

FAQ

Which company owns MAC address prefix 54:5F:A9?: MAC address prefix 54:5F:A9 is registered to Teracom Limited in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 54:5F:A9 has a network interface built by Teracom Limited.
What is the OUI 54:5F:A9?: 54:5F:A9 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Teracom Limited. It covers every address from 54:5F:A9:00:00:00 to 54:5F:A9:FF:FF:FF, or 16,777,216 addresses in total. It is also written 54-5F-A9.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 54:5F:A9:00:00:00 that is 54:5F:A9 — 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 Teracom Limited located?: Teracom Limited is listed at B-84, Sector - 60, Noida Uttar Pradesh IN 201 301 in the IEEE OUI registry entry for 54:5F:A9. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does Teracom Limited own?: Teracom Limited holds 3 OUI prefixes in the IEEE registry, of which 54:5F:A9 is one. A device made by Teracom Limited could carry a MAC address from any of them.