Which company owns MAC address prefix 10:9C:70?

MAC address prefix 10:9C:70 is registered to Prusa Research s.r.o. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 10:9C:70 has a network interface built by Prusa Research s.r.o..

What is the OUI 10:9C:70?

10:9C:70 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Prusa Research s.r.o.. It covers every address from 10:9C:70:00:00:00 to 10:9C:70:FF:FF:FF, or 16,777,216 addresses in total. It is also written 10-9C-70.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 10:9C:70:00:00:00 that is 10:9C:70 — 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 Prusa Research s.r.o. located?

Prusa Research s.r.o. is listed at Partyzanska 188/7a Prague CZ 17000 in the IEEE OUI registry entry for 10:9C:70. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Prusa Research s.r.o.

MAC address prefix 10:9C:70 is registered to Prusa Research s.r.o. in the IEEE OUI registry. Any device whose MAC address begins with 10:9C:70 has a network interface built by Prusa Research s.r.o.. 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 10:9C:70:00:00:00 to 10:9C:70:FF:FF:FF.

OUI prefix: 10:9C:70
Hyphen form: 10-9C-70
MAC range: 10:9C:70:00:00:00 – 10:9C:70:FF:FF:FF
Addresses in block: 16,777,216
Organization: Prusa Research s.r.o.
Address: Partyzanska 188/7a Prague CZ 17000
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.

2018-12-21Assigned to "Prusa Research s.r.o."
archived source →
2026-07-17Assigned to "Prusa Research s.r.o."

Nearby in the registry

The prefixes assigned immediately before and after 10:9C:70:

FAQ

Which company owns MAC address prefix 10:9C:70?: MAC address prefix 10:9C:70 is registered to Prusa Research s.r.o. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 10:9C:70 has a network interface built by Prusa Research s.r.o..
What is the OUI 10:9C:70?: 10:9C:70 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Prusa Research s.r.o.. It covers every address from 10:9C:70:00:00:00 to 10:9C:70:FF:FF:FF, or 16,777,216 addresses in total. It is also written 10-9C-70.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 10:9C:70:00:00:00 that is 10:9C:70 — 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 Prusa Research s.r.o. located?: Prusa Research s.r.o. is listed at Partyzanska 188/7a Prague CZ 17000 in the IEEE OUI registry entry for 10:9C:70. This is the address the organization registered with the IEEE, which may differ from its current operating address.