Which company owns MAC address prefix D8:4F:37?

MAC address prefix D8:4F:37 is registered to Proxis, spol. s r.o. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with D8:4F:37 has a network interface built by Proxis, spol. s r.o..

What is the OUI D8:4F:37?

D8:4F:37 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Proxis, spol. s r.o.. It covers every address from D8:4F:37:00:00:00 to D8:4F:37:FF:FF:FF, or 16,777,216 addresses in total. It is also written D8-4F-37.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in D8:4F:37:00:00:00 that is D8:4F:37 — 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 Proxis, spol. s r.o. located?

Proxis, spol. s r.o. is listed at Slovenska 1 Bardejov PSK SK 08501 in the IEEE OUI registry entry for D8:4F:37. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Proxis, spol. s r.o.

MAC address prefix D8:4F:37 is registered to Proxis, spol. s r.o. in the IEEE OUI registry. Any device whose MAC address begins with D8:4F:37 has a network interface built by Proxis, spol. 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 D8:4F:37:00:00:00 to D8:4F:37:FF:FF:FF.

OUI prefix: D8:4F:37
Hyphen form: D8-4F-37
MAC range: D8:4F:37:00:00:00 – D8:4F:37:FF:FF:FF
Addresses in block: 16,777,216
Organization: Proxis, spol. s r.o.
Address: Slovenska 1 Bardejov PSK SK 08501
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.

2020-04-23Assigned to "Proxis, spol. s r.o."
archived source →
2026-07-17Assigned to "Proxis, spol. s r.o."

Nearby in the registry

The prefixes assigned immediately before and after D8:4F:37:

FAQ

Which company owns MAC address prefix D8:4F:37?: MAC address prefix D8:4F:37 is registered to Proxis, spol. s r.o. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with D8:4F:37 has a network interface built by Proxis, spol. s r.o..
What is the OUI D8:4F:37?: D8:4F:37 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Proxis, spol. s r.o.. It covers every address from D8:4F:37:00:00:00 to D8:4F:37:FF:FF:FF, or 16,777,216 addresses in total. It is also written D8-4F-37.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in D8:4F:37:00:00:00 that is D8:4F:37 — 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 Proxis, spol. s r.o. located?: Proxis, spol. s r.o. is listed at Slovenska 1 Bardejov PSK SK 08501 in the IEEE OUI registry entry for D8:4F:37. This is the address the organization registered with the IEEE, which may differ from its current operating address.