Which company owns MAC address prefix D8:F3:DB?

MAC address prefix D8:F3:DB is registered to Post CH AG in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with D8:F3:DB has a network interface built by Post CH AG.

What is the OUI D8:F3:DB?

D8:F3:DB is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Post CH AG. It covers every address from D8:F3:DB:00:00:00 to D8:F3:DB:FF:FF:FF, or 16,777,216 addresses in total. It is also written D8-F3-DB.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in D8:F3:DB:00:00:00 that is D8:F3:DB — 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 Post CH AG located?

Post CH AG is listed at Wankdorfallee 4 Bern CH 3030 in the IEEE OUI registry entry for D8:F3:DB. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Post CH AG

MAC address prefix D8:F3:DB is registered to Post CH AG in the IEEE OUI registry. Any device whose MAC address begins with D8:F3:DB has a network interface built by Post CH AG. 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:F3:DB:00:00:00 to D8:F3:DB:FF:FF:FF.

OUI prefix: D8:F3:DB
Hyphen form: D8-F3-DB
MAC range: D8:F3:DB:00:00:00 – D8:F3:DB:FF:FF:FF
Addresses in block: 16,777,216
Organization: Post CH AG
Address: Wankdorfallee 4 Bern CH 3030
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 "Post CH AG"
archived source →
2026-07-17Assigned to "Post CH AG"

Nearby in the registry

The prefixes assigned immediately before and after D8:F3:DB:

FAQ

Which company owns MAC address prefix D8:F3:DB?: MAC address prefix D8:F3:DB is registered to Post CH AG in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with D8:F3:DB has a network interface built by Post CH AG.
What is the OUI D8:F3:DB?: D8:F3:DB is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Post CH AG. It covers every address from D8:F3:DB:00:00:00 to D8:F3:DB:FF:FF:FF, or 16,777,216 addresses in total. It is also written D8-F3-DB.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in D8:F3:DB:00:00:00 that is D8:F3:DB — 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 Post CH AG located?: Post CH AG is listed at Wankdorfallee 4 Bern CH 3030 in the IEEE OUI registry entry for D8:F3:DB. This is the address the organization registered with the IEEE, which may differ from its current operating address.