Which company owns MAC address prefix DC:2B:66?

MAC address prefix DC:2B:66 is registered to InfoBLOCK S.A. de C.V. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with DC:2B:66 has a network interface built by InfoBLOCK S.A. de C.V..

What is the OUI DC:2B:66?

DC:2B:66 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to InfoBLOCK S.A. de C.V.. It covers every address from DC:2B:66:00:00:00 to DC:2B:66:FF:FF:FF, or 16,777,216 addresses in total. It is also written DC-2B-66.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in DC:2B:66:00:00:00 that is DC:2B:66 — 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 InfoBLOCK S.A. de C.V. located?

InfoBLOCK S.A. de C.V. is listed at Hegel 229 - 10 Mexico City Distrito Federal MX 11570 in the IEEE OUI registry entry for DC:2B:66. This is the address the organization registered with the IEEE, which may differ from its current operating address.

InfoBLOCK S.A. de C.V.

MAC address prefix DC:2B:66 is registered to InfoBLOCK S.A. de C.V. in the IEEE OUI registry. Any device whose MAC address begins with DC:2B:66 has a network interface built by InfoBLOCK S.A. de C.V.. 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 DC:2B:66:00:00:00 to DC:2B:66:FF:FF:FF.

OUI prefix: DC:2B:66
Hyphen form: DC-2B-66
MAC range: DC:2B:66:00:00:00 – DC:2B:66:FF:FF:FF
Addresses in block: 16,777,216
Organization: InfoBLOCK S.A. de C.V.
Address: Hegel 229 - 10 Mexico City Distrito Federal MX 11570
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 "InfoBLOCK S.A. de C.V."
archived source →
2026-07-17Assigned to "InfoBLOCK S.A. de C.V."

Nearby in the registry

The prefixes assigned immediately before and after DC:2B:66:

FAQ

Which company owns MAC address prefix DC:2B:66?: MAC address prefix DC:2B:66 is registered to InfoBLOCK S.A. de C.V. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with DC:2B:66 has a network interface built by InfoBLOCK S.A. de C.V..
What is the OUI DC:2B:66?: DC:2B:66 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to InfoBLOCK S.A. de C.V.. It covers every address from DC:2B:66:00:00:00 to DC:2B:66:FF:FF:FF, or 16,777,216 addresses in total. It is also written DC-2B-66.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in DC:2B:66:00:00:00 that is DC:2B:66 — 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 InfoBLOCK S.A. de C.V. located?: InfoBLOCK S.A. de C.V. is listed at Hegel 229 - 10 Mexico City Distrito Federal MX 11570 in the IEEE OUI registry entry for DC:2B:66. This is the address the organization registered with the IEEE, which may differ from its current operating address.