Which company owns MAC address prefix 00:17:27?

MAC address prefix 00:17:27 is registered to Thermo Ramsey Italia s.r.l. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:17:27 has a network interface built by Thermo Ramsey Italia s.r.l..

What is the OUI 00:17:27?

00:17:27 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Thermo Ramsey Italia s.r.l.. It covers every address from 00:17:27:00:00:00 to 00:17:27:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-17-27.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 00:17:27:00:00:00 that is 00:17:27 — 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 Thermo Ramsey Italia s.r.l. located?

Thermo Ramsey Italia s.r.l. is listed at Strada Rivoltana km 6/7 Rodano Milano IT 20090 in the IEEE OUI registry entry for 00:17:27. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Thermo Ramsey Italia s.r.l.

MAC address prefix 00:17:27 is registered to Thermo Ramsey Italia s.r.l. in the IEEE OUI registry. Any device whose MAC address begins with 00:17:27 has a network interface built by Thermo Ramsey Italia s.r.l.. 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 00:17:27:00:00:00 to 00:17:27:FF:FF:FF.

OUI prefix: 00:17:27
Hyphen form: 00-17-27
MAC range: 00:17:27:00:00:00 – 00:17:27:FF:FF:FF
Addresses in block: 16,777,216
Organization: Thermo Ramsey Italia s.r.l.
Address: Strada Rivoltana km 6/7 Rodano Milano IT 20090
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 "Thermo Ramsey Italia s.r.l."
archived source →
2026-07-17Assigned to "Thermo Ramsey Italia s.r.l."

Nearby in the registry

The prefixes assigned immediately before and after 00:17:27:

FAQ

Which company owns MAC address prefix 00:17:27?: MAC address prefix 00:17:27 is registered to Thermo Ramsey Italia s.r.l. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:17:27 has a network interface built by Thermo Ramsey Italia s.r.l..
What is the OUI 00:17:27?: 00:17:27 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Thermo Ramsey Italia s.r.l.. It covers every address from 00:17:27:00:00:00 to 00:17:27:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-17-27.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 00:17:27:00:00:00 that is 00:17:27 — 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 Thermo Ramsey Italia s.r.l. located?: Thermo Ramsey Italia s.r.l. is listed at Strada Rivoltana km 6/7 Rodano Milano IT 20090 in the IEEE OUI registry entry for 00:17:27. This is the address the organization registered with the IEEE, which may differ from its current operating address.