Which company owns MAC address prefix 00:18:D9?

MAC address prefix 00:18:D9 is registered to Santosha Internatonal, Inc in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:18:D9 has a network interface built by Santosha Internatonal, Inc.

What is the OUI 00:18:D9?

00:18:D9 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Santosha Internatonal, Inc. It covers every address from 00:18:D9:00:00:00 to 00:18:D9:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-18-D9.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 00:18:D9:00:00:00 that is 00:18:D9 — 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 Santosha Internatonal, Inc located?

Santosha Internatonal, Inc is listed at 3843 S. Bristol St. #242 Santa Ana CA US 92704 in the IEEE OUI registry entry for 00:18:D9. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Santosha Internatonal, Inc

MAC address prefix 00:18:D9 is registered to Santosha Internatonal, Inc in the IEEE OUI registry. Any device whose MAC address begins with 00:18:D9 has a network interface built by Santosha Internatonal, Inc. 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 00:18:D9:00:00:00 to 00:18:D9:FF:FF:FF.

OUI prefix: 00:18:D9
Hyphen form: 00-18-D9
MAC range: 00:18:D9:00:00:00 – 00:18:D9:FF:FF:FF
Addresses in block: 16,777,216
Organization: Santosha Internatonal, Inc
Address: 3843 S. Bristol St. #242 Santa Ana CA US 92704
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 "Santosha Internatonal, Inc"
archived source →
2026-07-17Assigned to "Santosha Internatonal, Inc"

Nearby in the registry

The prefixes assigned immediately before and after 00:18:D9:

FAQ

Which company owns MAC address prefix 00:18:D9?: MAC address prefix 00:18:D9 is registered to Santosha Internatonal, Inc in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:18:D9 has a network interface built by Santosha Internatonal, Inc.
What is the OUI 00:18:D9?: 00:18:D9 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Santosha Internatonal, Inc. It covers every address from 00:18:D9:00:00:00 to 00:18:D9:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-18-D9.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 00:18:D9:00:00:00 that is 00:18:D9 — 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 Santosha Internatonal, Inc located?: Santosha Internatonal, Inc is listed at 3843 S. Bristol St. #242 Santa Ana CA US 92704 in the IEEE OUI registry entry for 00:18:D9. This is the address the organization registered with the IEEE, which may differ from its current operating address.