Which company owns MAC address prefix CC:E0:C3?

MAC address prefix CC:E0:C3 is registered to EXTEN Technologies, Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with CC:E0:C3 has a network interface built by EXTEN Technologies, Inc..

What is the OUI CC:E0:C3?

CC:E0:C3 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to EXTEN Technologies, Inc.. It covers every address from CC:E0:C3:00:00:00 to CC:E0:C3:FF:FF:FF, or 16,777,216 addresses in total. It is also written CC-E0-C3.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in CC:E0:C3:00:00:00 that is CC:E0:C3 — 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 EXTEN Technologies, Inc. located?

EXTEN Technologies, Inc. is listed at 4201 W Parmer Lane Bldg A, Ste 200 Austin TX US 78727 in the IEEE OUI registry entry for CC:E0:C3. This is the address the organization registered with the IEEE, which may differ from its current operating address.

EXTEN Technologies, Inc.

MAC address prefix CC:E0:C3 is registered to EXTEN Technologies, Inc. in the IEEE OUI registry. Any device whose MAC address begins with CC:E0:C3 has a network interface built by EXTEN Technologies, 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 CC:E0:C3:00:00:00 to CC:E0:C3:FF:FF:FF.

OUI prefix: CC:E0:C3
Hyphen form: CC-E0-C3
MAC range: CC:E0:C3:00:00:00 – CC:E0:C3:FF:FF:FF
Addresses in block: 16,777,216
Organization: EXTEN Technologies, Inc.
Address: 4201 W Parmer Lane Bldg A, Ste 200 Austin TX US 78727
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 (3)

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 "Mangstor, Inc."
archived source →
2018-12-21Renamed from "Mangstor, Inc." to "EXTEN Technologies, Inc."
archived source →
2026-07-17Assigned to "EXTEN Technologies, Inc."

Nearby in the registry

The prefixes assigned immediately before and after CC:E0:C3:

FAQ

Which company owns MAC address prefix CC:E0:C3?: MAC address prefix CC:E0:C3 is registered to EXTEN Technologies, Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with CC:E0:C3 has a network interface built by EXTEN Technologies, Inc..
What is the OUI CC:E0:C3?: CC:E0:C3 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to EXTEN Technologies, Inc.. It covers every address from CC:E0:C3:00:00:00 to CC:E0:C3:FF:FF:FF, or 16,777,216 addresses in total. It is also written CC-E0-C3.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in CC:E0:C3:00:00:00 that is CC:E0:C3 — 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 EXTEN Technologies, Inc. located?: EXTEN Technologies, Inc. is listed at 4201 W Parmer Lane Bldg A, Ste 200 Austin TX US 78727 in the IEEE OUI registry entry for CC:E0:C3. This is the address the organization registered with the IEEE, which may differ from its current operating address.