Which company owns MAC address prefix DC:9B:1E?

MAC address prefix DC:9B:1E is registered to Intercom, Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with DC:9B:1E has a network interface built by Intercom, Inc..

What is the OUI DC:9B:1E?

DC:9B:1E is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Intercom, Inc.. It covers every address from DC:9B:1E:00:00:00 to DC:9B:1E:FF:FF:FF, or 16,777,216 addresses in total. It is also written DC-9B-1E.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in DC:9B:1E:00:00:00 that is DC:9B:1E — 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 Intercom, Inc. located?

Intercom, Inc. is listed at Sorimachi Bldg., 3-5, Taito 1-chome, Taito-ku Tokyo JP 110-8654 in the IEEE OUI registry entry for DC:9B:1E. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Intercom, Inc.

MAC address prefix DC:9B:1E is registered to Intercom, Inc. in the IEEE OUI registry. Any device whose MAC address begins with DC:9B:1E has a network interface built by Intercom, 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 DC:9B:1E:00:00:00 to DC:9B:1E:FF:FF:FF.

OUI prefix: DC:9B:1E
Hyphen form: DC-9B-1E
MAC range: DC:9B:1E:00:00:00 – DC:9B:1E:FF:FF:FF
Addresses in block: 16,777,216
Organization: Intercom, Inc.
Address: Sorimachi Bldg., 3-5, Taito 1-chome, Taito-ku Tokyo JP 110-8654
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 "Intercom, Inc."
archived source →
2026-07-17Assigned to "Intercom, Inc."

Nearby in the registry

The prefixes assigned immediately before and after DC:9B:1E:

FAQ

Which company owns MAC address prefix DC:9B:1E?: MAC address prefix DC:9B:1E is registered to Intercom, Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with DC:9B:1E has a network interface built by Intercom, Inc..
What is the OUI DC:9B:1E?: DC:9B:1E is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Intercom, Inc.. It covers every address from DC:9B:1E:00:00:00 to DC:9B:1E:FF:FF:FF, or 16,777,216 addresses in total. It is also written DC-9B-1E.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in DC:9B:1E:00:00:00 that is DC:9B:1E — 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 Intercom, Inc. located?: Intercom, Inc. is listed at Sorimachi Bldg., 3-5, Taito 1-chome, Taito-ku Tokyo JP 110-8654 in the IEEE OUI registry entry for DC:9B:1E. This is the address the organization registered with the IEEE, which may differ from its current operating address.