Which company owns MAC address prefix 9C:F6:7D?

MAC address prefix 9C:F6:7D is registered to Ricardo Prague, s.r.o. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 9C:F6:7D has a network interface built by Ricardo Prague, s.r.o..

What is the OUI 9C:F6:7D?

9C:F6:7D is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Ricardo Prague, s.r.o.. It covers every address from 9C:F6:7D:00:00:00 to 9C:F6:7D:FF:FF:FF, or 16,777,216 addresses in total. It is also written 9C-F6-7D.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 9C:F6:7D:00:00:00 that is 9C:F6:7D — 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 Ricardo Prague, s.r.o. located?

Ricardo Prague, s.r.o. is listed at Thamova 13 Praha 8 CZ 186 00 in the IEEE OUI registry entry for 9C:F6:7D. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Ricardo Prague, s.r.o.

MAC address prefix 9C:F6:7D is registered to Ricardo Prague, s.r.o. in the IEEE OUI registry. Any device whose MAC address begins with 9C:F6:7D has a network interface built by Ricardo Prague, 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 9C:F6:7D:00:00:00 to 9C:F6:7D:FF:FF:FF.

OUI prefix: 9C:F6:7D
Hyphen form: 9C-F6-7D
MAC range: 9C:F6:7D:00:00:00 – 9C:F6:7D:FF:FF:FF
Addresses in block: 16,777,216
Organization: Ricardo Prague, s.r.o.
Address: Thamova 13 Praha 8 CZ 186 00
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 "Ricardo Prague, s.r.o."
archived source →
2026-07-17Assigned to "Ricardo Prague, s.r.o."

Nearby in the registry

The prefixes assigned immediately before and after 9C:F6:7D:

FAQ

Which company owns MAC address prefix 9C:F6:7D?: MAC address prefix 9C:F6:7D is registered to Ricardo Prague, s.r.o. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 9C:F6:7D has a network interface built by Ricardo Prague, s.r.o..
What is the OUI 9C:F6:7D?: 9C:F6:7D is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Ricardo Prague, s.r.o.. It covers every address from 9C:F6:7D:00:00:00 to 9C:F6:7D:FF:FF:FF, or 16,777,216 addresses in total. It is also written 9C-F6-7D.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 9C:F6:7D:00:00:00 that is 9C:F6:7D — 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 Ricardo Prague, s.r.o. located?: Ricardo Prague, s.r.o. is listed at Thamova 13 Praha 8 CZ 186 00 in the IEEE OUI registry entry for 9C:F6:7D. This is the address the organization registered with the IEEE, which may differ from its current operating address.