Which company owns MAC address prefix 10:30:34?

MAC address prefix 10:30:34 is registered to Cara Systems in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 10:30:34 has a network interface built by Cara Systems.

What is the OUI 10:30:34?

10:30:34 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Cara Systems. It covers every address from 10:30:34:00:00:00 to 10:30:34:FF:FF:FF, or 16,777,216 addresses in total. It is also written 10-30-34.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 10:30:34:00:00:00 that is 10:30:34 — 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 Cara Systems located?

Cara Systems is listed at Ruzgarlibahce Mah. Kavak Sok. No: 31/1 Smart Plaza B Blok Kat: 4 Istanbul Kavacik Beykoz TR 23805 in the IEEE OUI registry entry for 10:30:34. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Cara Systems

MAC address prefix 10:30:34 is registered to Cara Systems in the IEEE OUI registry. Any device whose MAC address begins with 10:30:34 has a network interface built by Cara Systems. 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 10:30:34:00:00:00 to 10:30:34:FF:FF:FF.

OUI prefix: 10:30:34
Hyphen form: 10-30-34
MAC range: 10:30:34:00:00:00 – 10:30:34:FF:FF:FF
Addresses in block: 16,777,216
Organization: Cara Systems
Address: Ruzgarlibahce Mah. Kavak Sok. No: 31/1 Smart Plaza B Blok Kat: 4 Istanbul Kavacik Beykoz TR 23805
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.

2017-09-08Assigned to "Cara Systems"
archived source →
2026-07-17Assigned to "Cara Systems"

Nearby in the registry

The prefixes assigned immediately before and after 10:30:34:

FAQ

Which company owns MAC address prefix 10:30:34?: MAC address prefix 10:30:34 is registered to Cara Systems in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 10:30:34 has a network interface built by Cara Systems.
What is the OUI 10:30:34?: 10:30:34 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Cara Systems. It covers every address from 10:30:34:00:00:00 to 10:30:34:FF:FF:FF, or 16,777,216 addresses in total. It is also written 10-30-34.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 10:30:34:00:00:00 that is 10:30:34 — 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 Cara Systems located?: Cara Systems is listed at Ruzgarlibahce Mah. Kavak Sok. No: 31/1 Smart Plaza B Blok Kat: 4 Istanbul Kavacik Beykoz TR 23805 in the IEEE OUI registry entry for 10:30:34. This is the address the organization registered with the IEEE, which may differ from its current operating address.