Which company owns MAC address prefix B4:C8:10?

MAC address prefix B4:C8:10 is registered to Umpi srl in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B4:C8:10 has a network interface built by Umpi srl.

What is the OUI B4:C8:10?

B4:C8:10 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Umpi srl. It covers every address from B4:C8:10:00:00:00 to B4:C8:10:FF:FF:FF, or 16,777,216 addresses in total. It is also written B4-C8-10.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in B4:C8:10:00:00:00 that is B4:C8:10 — 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 Umpi srl located?

Umpi srl is listed at Via Consolare Rimini-San Marino, 11 Rimini IT 47923 in the IEEE OUI registry entry for B4:C8:10. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Umpi srl

MAC address prefix B4:C8:10 is registered to Umpi srl in the IEEE OUI registry. Any device whose MAC address begins with B4:C8:10 has a network interface built by Umpi srl. 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 B4:C8:10:00:00:00 to B4:C8:10:FF:FF:FF.

OUI prefix: B4:C8:10
Hyphen form: B4-C8-10
MAC range: B4:C8:10:00:00:00 – B4:C8:10:FF:FF:FF
Addresses in block: 16,777,216
Organization: Umpi srl
Address: Via Consolare Rimini-San Marino, 11 Rimini IT 47923
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 (3)

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 "UMPI Elettronica"
archived source →
2021-06-10Renamed from "UMPI Elettronica" to "Umpi srl"
archived source →
2026-07-17Assigned to "Umpi srl"

Nearby in the registry

The prefixes assigned immediately before and after B4:C8:10:

FAQ

Which company owns MAC address prefix B4:C8:10?: MAC address prefix B4:C8:10 is registered to Umpi srl in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B4:C8:10 has a network interface built by Umpi srl.
What is the OUI B4:C8:10?: B4:C8:10 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Umpi srl. It covers every address from B4:C8:10:00:00:00 to B4:C8:10:FF:FF:FF, or 16,777,216 addresses in total. It is also written B4-C8-10.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in B4:C8:10:00:00:00 that is B4:C8:10 — 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 Umpi srl located?: Umpi srl is listed at Via Consolare Rimini-San Marino, 11 Rimini IT 47923 in the IEEE OUI registry entry for B4:C8:10. This is the address the organization registered with the IEEE, which may differ from its current operating address.