Which company owns MAC address prefix CC:19:A8?

MAC address prefix CC:19:A8 is registered to PT Inovação e Sistemas SA in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with CC:19:A8 has a network interface built by PT Inovação e Sistemas SA.

What is the OUI CC:19:A8?

CC:19:A8 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to PT Inovação e Sistemas SA. It covers every address from CC:19:A8:00:00:00 to CC:19:A8:FF:FF:FF, or 16,777,216 addresses in total. It is also written CC-19-A8.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in CC:19:A8:00:00:00 that is CC:19:A8 — 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 PT Inovação e Sistemas SA located?

PT Inovação e Sistemas SA is listed at Rua Eng. José Ferreira Pinto Basto Aveiro Aveiro PT 3810-106 in the IEEE OUI registry entry for CC:19:A8. This is the address the organization registered with the IEEE, which may differ from its current operating address.

PT Inovação e Sistemas SA

MAC address prefix CC:19:A8 is registered to PT Inovação e Sistemas SA in the IEEE OUI registry. Any device whose MAC address begins with CC:19:A8 has a network interface built by PT Inovação e Sistemas SA. 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:19:A8:00:00:00 to CC:19:A8:FF:FF:FF.

OUI prefix: CC:19:A8
Hyphen form: CC-19-A8
MAC range: CC:19:A8:00:00:00 – CC:19:A8:FF:FF:FF
Addresses in block: 16,777,216
Organization: PT Inovação e Sistemas SA
Address: Rua Eng. José Ferreira Pinto Basto Aveiro Aveiro PT 3810-106
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 "PT Inovação e Sistemas SA"
archived source →
2026-07-17Assigned to "PT Inovação e Sistemas SA"

Nearby in the registry

The prefixes assigned immediately before and after CC:19:A8:

FAQ

Which company owns MAC address prefix CC:19:A8?: MAC address prefix CC:19:A8 is registered to PT Inovação e Sistemas SA in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with CC:19:A8 has a network interface built by PT Inovação e Sistemas SA.
What is the OUI CC:19:A8?: CC:19:A8 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to PT Inovação e Sistemas SA. It covers every address from CC:19:A8:00:00:00 to CC:19:A8:FF:FF:FF, or 16,777,216 addresses in total. It is also written CC-19-A8.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in CC:19:A8:00:00:00 that is CC:19:A8 — 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 PT Inovação e Sistemas SA located?: PT Inovação e Sistemas SA is listed at Rua Eng. José Ferreira Pinto Basto Aveiro Aveiro PT 3810-106 in the IEEE OUI registry entry for CC:19:A8. This is the address the organization registered with the IEEE, which may differ from its current operating address.