Which company owns MAC address prefix E4:28:A4?

MAC address prefix E4:28:A4 is registered to Prama India Private Limited in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E4:28:A4 has a network interface built by Prama India Private Limited.

What is the OUI E4:28:A4?

E4:28:A4 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Prama India Private Limited. It covers every address from E4:28:A4:00:00:00 to E4:28:A4:FF:FF:FF, or 16,777,216 addresses in total. It is also written E4-28-A4.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in E4:28:A4:00:00:00 that is E4:28:A4 — 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 Prama India Private Limited located?

Prama India Private Limited is listed at Off 103, 765 Fly Edge, TPS III Jn of S V Rd, Nr Kora Kendra Borivali West, Mumbai Maharashtra IN 400092 in the IEEE OUI registry entry for E4:28:A4. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Prama India Private Limited

MAC address prefix E4:28:A4 is registered to Prama India Private Limited in the IEEE OUI registry. Any device whose MAC address begins with E4:28:A4 has a network interface built by Prama India Private 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 E4:28:A4:00:00:00 to E4:28:A4:FF:FF:FF.

OUI prefix: E4:28:A4
Hyphen form: E4-28-A4
MAC range: E4:28:A4:00:00:00 – E4:28:A4:FF:FF:FF
Addresses in block: 16,777,216
Organization: Prama India Private Limited
Address: Off 103, 765 Fly Edge, TPS III Jn of S V Rd, Nr Kora Kendra Borivali West, Mumbai Maharashtra IN 400092
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.

2021-02-25Assigned to "Prama India Private Limited"
archived source →
2026-07-17Assigned to "Prama India Private Limited"

Nearby in the registry

The prefixes assigned immediately before and after E4:28:A4:

FAQ

Which company owns MAC address prefix E4:28:A4?: MAC address prefix E4:28:A4 is registered to Prama India Private Limited in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E4:28:A4 has a network interface built by Prama India Private Limited.
What is the OUI E4:28:A4?: E4:28:A4 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Prama India Private Limited. It covers every address from E4:28:A4:00:00:00 to E4:28:A4:FF:FF:FF, or 16,777,216 addresses in total. It is also written E4-28-A4.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in E4:28:A4:00:00:00 that is E4:28:A4 — 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 Prama India Private Limited located?: Prama India Private Limited is listed at Off 103, 765 Fly Edge, TPS III Jn of S V Rd, Nr Kora Kendra Borivali West, Mumbai Maharashtra IN 400092 in the IEEE OUI registry entry for E4:28:A4. This is the address the organization registered with the IEEE, which may differ from its current operating address.