Which company owns MAC address prefix 18:48:D8?

MAC address prefix 18:48:D8 is registered to Fastback Networks in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 18:48:D8 has a network interface built by Fastback Networks.

What is the OUI 18:48:D8?

18:48:D8 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Fastback Networks. It covers every address from 18:48:D8:00:00:00 to 18:48:D8:FF:FF:FF, or 16,777,216 addresses in total. It is also written 18-48-D8.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 18:48:D8:00:00:00 that is 18:48:D8 — 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 Fastback Networks located?

Fastback Networks is listed at 2480 N 1st Street San Jose California US 95131 in the IEEE OUI registry entry for 18:48:D8. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Fastback Networks

MAC address prefix 18:48:D8 is registered to Fastback Networks in the IEEE OUI registry. Any device whose MAC address begins with 18:48:D8 has a network interface built by Fastback Networks. 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 18:48:D8:00:00:00 to 18:48:D8:FF:FF:FF.

OUI prefix: 18:48:D8
Hyphen form: 18-48-D8
MAC range: 18:48:D8:00:00:00 – 18:48:D8:FF:FF:FF
Addresses in block: 16,777,216
Organization: Fastback Networks
Address: 2480 N 1st Street San Jose California US 95131
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 "Fastback Networks"
archived source →
2026-07-17Assigned to "Fastback Networks"

Nearby in the registry

The prefixes assigned immediately before and after 18:48:D8:

FAQ

Which company owns MAC address prefix 18:48:D8?: MAC address prefix 18:48:D8 is registered to Fastback Networks in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 18:48:D8 has a network interface built by Fastback Networks.
What is the OUI 18:48:D8?: 18:48:D8 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Fastback Networks. It covers every address from 18:48:D8:00:00:00 to 18:48:D8:FF:FF:FF, or 16,777,216 addresses in total. It is also written 18-48-D8.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 18:48:D8:00:00:00 that is 18:48:D8 — 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 Fastback Networks located?: Fastback Networks is listed at 2480 N 1st Street San Jose California US 95131 in the IEEE OUI registry entry for 18:48:D8. This is the address the organization registered with the IEEE, which may differ from its current operating address.