Identify hardware manufacturers and network interface card vendors from MAC address OUI codes.
MAC Address Lookup | OUI Vendor Lookup | Find Device Manufacturer | NetAIForge
) consists of 48 bits, typically written as six groups of hexadecimal digits. Our
OUI (Organizationally Unique Identifier)
. These prefixes are managed and assigned by the
IEEE (Institute of Electrical and Electronics Engineers)
are assigned to Cisco Systems, while
ARP (Address Resolution Protocol)
170 West Tasman Dr., San Jose, CA 95134, US
One Apple Park Way, Cupertino, CA 95014, US
One Dell Way, Round Rock, TX 78682, US
1701 E Mossy Oaks Rd, Spring, TX 77389, US
3333 Scott Blvd, Santa Clara, CA 95054, US
South Area, Shenzhen Hi-Tech Industrial Park, Nanshan, Shenzhen, CN
No. 289, Sinhu 3rd Rd., Neihu District, Taipei, TW
Locally Administered Network Interface
IEEE Registered Address (Global Registry)
Vendor not found in IEEE OUI database.
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OUI stands for Organizationally Unique Identifier. It is the first 24 bits (3 octets) of a MAC address that uniquely identifies the manufacturing organization or device vendor as registered with the IEEE Registration Authority.
How do I identify a MAC vendor?
You can identify the vendor by looking up the first 6 hexadecimal characters (e.g. 00:00:0C for Cisco) in the IEEE OUI database. Our free lookup tool automatically maps the prefix to the registered organization.
Can I find a device manufacturer using a MAC address?
Yes. Every network card, router, server, or smartphone has a MAC address with a prefix assigned to its manufacturer (like Apple, Intel, Cisco, Dell, or Nokia).
How accurate is IEEE OUI Lookup?
Extremely accurate. OUIs are allocated by the IEEE Registration Authority, which maintains the authoritative database of prefix assignments. Our database synchronizes weekly to include newly registered blocks.
What is the difference between MAC Address and OUI?
The OUI consists of the first 24 bits of the address and represents the manufacturer. The entire 48-bit MAC address includes the OUI plus 24 unique bits assigned by the vendor to identify that specific hardware unit.
A MAC Prefix refers to the Organizationally Unique Identifier (OUI) portion of the MAC address. It can be formatted as 24-bit, 28-bit, or 36-bit blocks depending on the registry assignment category (MA-L, MA-M, or MA-S).
How does MAC Vendor Lookup work?
Can I identify Cisco devices using MAC?
Yes, Cisco devices use well-known registered OUIs such as 00:00:0C, 00:03:E3, and 3C:5A:B4. Inputting these prefixes returns Cisco Systems, Inc. instantly.
Can I identify Juniper devices using MAC?
Yes, Juniper networks gear has prefixes registered under blocks like 00:05:85, 00:1F:12, and 00:26:88, identifying the hardware as Juniper Networks.
Can I identify Apple devices using MAC?
Yes. Apple maintains a very large block of OUIs (e.g. 00:17:F2, B0:70:2D, F8:27:93). Searching these returns Apple, Inc.
Can I identify Dell devices using MAC?
Yes. Dell hardware contains prefixes like 00:14:22, 14:18:77, and F8:DB:88, which map to Dell Inc. on our assignment registries.
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Lookup MAC addresses instantly to identify IEEE OUI vendors, device manufacturers, NIC vendors, company information, hardware vendors, and network device details. Fast, free, and accurate MAC Address Lookup tool.
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> Every hardware device that connects to a network—whether it is a Cisco Router, a Nokia SROS Linecard, or an Apple iPhone—is assigned a unique physical address known as a MAC (Media Access Control) address. Unlike IP addresses, which change based on the device's location, the MAC address is
> In recent years, mobile operating systems (iOS and Android) have introduced MAC Randomization to protect user privacy. These devices generate
> NetAIForge's engine identifies these randomized addresses. If a lookup returns
OUI stands for Organizationally Unique Identifier. It is the first 24 bits of a MAC address that uniquely identifies the manufacturer of the network interface.
Our backend synchronizes with the official IEEE MA-L (OUI), MA-M, and MA-S registries every week to ensure 100% accuracy for newly released hardware.
Yes. You only need the first 6 characters (the OUI) to identify the manufacturer. For example, searching '3C5AB4' is enough to get a result.
No, the MAC address only identifies the manufacturer. However, many vendors assign specific OUI ranges to certain product lines (e.g., specific prefixes for IP phones vs. routers).
Modern smartphones often use randomized MAC addresses for privacy when scanning for Wi-Fi. These addresses do not have a registered manufacturer in the IEEE database.
In the context of networking, they are effectively the same. EUI-48 is the modern term used by IEEE, while MAC-48 is the legacy term commonly used by engineers.