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VIETNAM POST AND TELECOMMUNICATION INDUSTRY TECHNOLOGY JOIN STOCK COMPANY

MAC address prefix 4C:12:E8 is registered to VIETNAM POST AND TELECOMMUNICATION INDUSTRY TECHNOLOGY JOIN STOCK COMPANY in the IEEE OUI registry. Any device whose MAC address begins with 4C:12:E8 has a network interface built by VIETNAM POST AND TELECOMMUNICATION INDUSTRY TECHNOLOGY JOIN STOCK COMPANY. 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 4C:12:E8:00:00:00 to 4C:12:E8:FF:FF:FF.

OUI prefix
4C:12:E8
Hyphen form
4C-12-E8
MAC range
4C:12:E8:00:00:00 – 4C:12:E8:FF:FF:FF
Addresses in block
16,777,216
Organization
VIETNAM POST AND TELECOMMUNICATION INDUSTRY TECHNOLOGY JOIN STOCK COMPANY
Address
High Tech Industrial Zone I, Hoa Lac High Tech Park, Ha Bang Commune Ha Noi Thach That VN 100000
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.

Other prefixes from VIETNAM POST AND TELECOMMUNICATION INDUSTRY TECHNOLOGY JOIN STOCK COMPANY

VIETNAM POST AND TELECOMMUNICATION INDUSTRY TECHNOLOGY JOIN STOCK COMPANY holds 4 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

Assignment history (2)

The IEEE registry publishes current state only — this is the change record we've kept since we started tracking it daily.

  1. 2023-07-11Assigned to "VIETNAM POST AND TELECOMMUNICATION INDUSTRY TECHNOLOGY JOIN STOCK COMPANY"
    archived source →
  2. 2026-07-17Assigned to "VIETNAM POST AND TELECOMMUNICATION INDUSTRY TECHNOLOGY JOIN STOCK COMPANY"

Nearby in the registry

The prefixes assigned immediately before and after 4C:12:E8:

FAQ

Which company owns MAC address prefix 4C:12:E8?
MAC address prefix 4C:12:E8 is registered to VIETNAM POST AND TELECOMMUNICATION INDUSTRY TECHNOLOGY JOIN STOCK COMPANY in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 4C:12:E8 has a network interface built by VIETNAM POST AND TELECOMMUNICATION INDUSTRY TECHNOLOGY JOIN STOCK COMPANY.
What is the OUI 4C:12:E8?
4C:12:E8 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to VIETNAM POST AND TELECOMMUNICATION INDUSTRY TECHNOLOGY JOIN STOCK COMPANY. It covers every address from 4C:12:E8:00:00:00 to 4C:12:E8:FF:FF:FF, or 16,777,216 addresses in total. It is also written 4C-12-E8.
How do I find the manufacturer of a MAC address?
Take the first three octets of the address — in 4C:12:E8:00:00:00 that is 4C:12:E8 — 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 VIETNAM POST AND TELECOMMUNICATION INDUSTRY TECHNOLOGY JOIN STOCK COMPANY located?
VIETNAM POST AND TELECOMMUNICATION INDUSTRY TECHNOLOGY JOIN STOCK COMPANY is listed at High Tech Industrial Zone I, Hoa Lac High Tech Park, Ha Bang Commune Ha Noi Thach That VN 100000 in the IEEE OUI registry entry for 4C:12:E8. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does VIETNAM POST AND TELECOMMUNICATION INDUSTRY TECHNOLOGY JOIN STOCK COMPANY own?
VIETNAM POST AND TELECOMMUNICATION INDUSTRY TECHNOLOGY JOIN STOCK COMPANY holds 4 OUI prefixes in the IEEE registry, of which 4C:12:E8 is one. A device made by VIETNAM POST AND TELECOMMUNICATION INDUSTRY TECHNOLOGY JOIN STOCK COMPANY could carry a MAC address from any of them.