Which company owns MAC address prefix 64:CB:5D?

MAC address prefix 64:CB:5D is registered to SIA "TeleSet" in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 64:CB:5D has a network interface built by SIA "TeleSet".

What is the OUI 64:CB:5D?

64:CB:5D is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to SIA "TeleSet". It covers every address from 64:CB:5D:00:00:00 to 64:CB:5D:FF:FF:FF, or 16,777,216 addresses in total. It is also written 64-CB-5D.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 64:CB:5D:00:00:00 that is 64:CB:5D — 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 SIA "TeleSet" located?

SIA "TeleSet" is listed at Krāslavas iela 5 Vecstropi, Naujenes par., Daugavpils distr. LV LV-5413 in the IEEE OUI registry entry for 64:CB:5D. This is the address the organization registered with the IEEE, which may differ from its current operating address.

SIA "TeleSet"

MAC address prefix 64:CB:5D is registered to SIA "TeleSet" in the IEEE OUI registry. Any device whose MAC address begins with 64:CB:5D has a network interface built by SIA "TeleSet". 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 64:CB:5D:00:00:00 to 64:CB:5D:FF:FF:FF.

OUI prefix: 64:CB:5D
Hyphen form: 64-CB-5D
MAC range: 64:CB:5D:00:00:00 – 64:CB:5D:FF:FF:FF
Addresses in block: 16,777,216
Organization: SIA "TeleSet"
Address: Krāslavas iela 5 Vecstropi, Naujenes par., Daugavpils distr. LV LV-5413
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 "SIA "TeleSet""
archived source →
2026-07-17Assigned to "SIA "TeleSet""

Nearby in the registry

The prefixes assigned immediately before and after 64:CB:5D:

FAQ

Which company owns MAC address prefix 64:CB:5D?: MAC address prefix 64:CB:5D is registered to SIA "TeleSet" in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 64:CB:5D has a network interface built by SIA "TeleSet".
What is the OUI 64:CB:5D?: 64:CB:5D is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to SIA "TeleSet". It covers every address from 64:CB:5D:00:00:00 to 64:CB:5D:FF:FF:FF, or 16,777,216 addresses in total. It is also written 64-CB-5D.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 64:CB:5D:00:00:00 that is 64:CB:5D — 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 SIA "TeleSet" located?: SIA "TeleSet" is listed at Krāslavas iela 5 Vecstropi, Naujenes par., Daugavpils distr. LV LV-5413 in the IEEE OUI registry entry for 64:CB:5D. This is the address the organization registered with the IEEE, which may differ from its current operating address.