Which company owns MAC address prefix 08:35:71?

MAC address prefix 08:35:71 is registered to CASwell INC. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 08:35:71 has a network interface built by CASwell INC..

What is the OUI 08:35:71?

08:35:71 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to CASwell INC.. It covers every address from 08:35:71:00:00:00 to 08:35:71:FF:FF:FF, or 16,777,216 addresses in total. It is also written 08-35-71.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 08:35:71:00:00:00 that is 08:35:71 — 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 CASwell INC. located?

CASwell INC. is listed at 8F,No.242,Bo-Ai St., Shu-Lin Dist.,New Taipei City ,Taiwan. New Taipei City Taiwan TW 23845 in the IEEE OUI registry entry for 08:35:71. This is the address the organization registered with the IEEE, which may differ from its current operating address.

CASwell INC.

MAC address prefix 08:35:71 is registered to CASwell INC. in the IEEE OUI registry. Any device whose MAC address begins with 08:35:71 has a network interface built by CASwell INC.. 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 08:35:71:00:00:00 to 08:35:71:FF:FF:FF.

OUI prefix: 08:35:71
Hyphen form: 08-35-71
MAC range: 08:35:71:00:00:00 – 08:35:71:FF:FF:FF
Addresses in block: 16,777,216
Organization: CASwell INC.
Address: 8F,No.242,Bo-Ai St., Shu-Lin Dist.,New Taipei City ,Taiwan. New Taipei City Taiwan TW 23845
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 "CASwell INC."
archived source →
2026-07-17Assigned to "CASwell INC."

Nearby in the registry

The prefixes assigned immediately before and after 08:35:71:

FAQ

Which company owns MAC address prefix 08:35:71?: MAC address prefix 08:35:71 is registered to CASwell INC. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 08:35:71 has a network interface built by CASwell INC..
What is the OUI 08:35:71?: 08:35:71 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to CASwell INC.. It covers every address from 08:35:71:00:00:00 to 08:35:71:FF:FF:FF, or 16,777,216 addresses in total. It is also written 08-35-71.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 08:35:71:00:00:00 that is 08:35:71 — 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 CASwell INC. located?: CASwell INC. is listed at 8F,No.242,Bo-Ai St., Shu-Lin Dist.,New Taipei City ,Taiwan. New Taipei City Taiwan TW 23845 in the IEEE OUI registry entry for 08:35:71. This is the address the organization registered with the IEEE, which may differ from its current operating address.