Tool Introduction
This tool is a convenient online Mac address vendor lookup tool. Users only need to enter a device's Mac address to quickly query the manufacturing vendor information corresponding to that Mac address. The query results will display detailed company name, country, province/state (including postal code), and specific street address. This provides great convenience for network device management, asset inventory, security auditing, troubleshooting, and identifying the source of unknown network devices, helping users quickly understand the physical ownership of Mac addresses.
Mac Address Introduction
A Mac address (Media Access Control Address), also known as a physical address, hardware address, or Ethernet address, is a unique identifier assigned to a network interface controller (NIC) to uniquely identify a network device on a local area network (LAN) or wide area network (WAN). It typically consists of 48 binary bits, represented by 12 hexadecimal digits, such as 00:1A:2B:3C:4D:5E. Mac addresses are globally unique, managed by the IEEE, and are hard-coded into the network card hardware during device manufacturing, hence they are called "burned-in addresses".
OUI (Organizationally Unique Identifier)
The first 24 bits of a Mac address (i.e., the first 6 hexadecimal characters) are called the OUI (Organizationally Unique Identifier). This OUI is assigned by the IEEE to different hardware manufacturers or organizations, ensuring its global uniqueness. By querying the OUI part of the Mac address, we can accurately identify the manufacturer of that network device. This tool is based on this principle, parsing the OUI of the entered Mac address and matching it in a vast database to provide detailed vendor information lookup services, helping users trace the origin of devices.
How to Use
- In the "Mac Address" input box on the page, enter the Mac address you need to query.
- Please ensure that the entered Mac address format is correct. This tool supports various common formats, such as:
XX:XX:XX:XX:XX:XX (colon-separated), XX-XX-XX-XX-XX-XX (hyphen-separated), or XXXXXXXXXXXX (12 hexadecimal characters without separators). Input is case-insensitive.
- Click the "Query" button to submit the query request.
- The query results will be displayed in a list format, including detailed information such as "Company Name", "Country", "Province/State (Postal Code)", and "Street".
Frequently Asked Questions
- Q: What Mac address input formats does this tool support?
- A: This tool supports various common Mac address formats, such as:
XX:XX:XX:XX:XX:XX (colon-separated), XX-XX-XX-XX-XX-XX (hyphen-separated), and XXXXXXXXXXXX (12 hexadecimal characters without separators). Input is case-insensitive.
- Q: What specific information will the query results provide?
- A: The query results will be presented in a clear list format, including detailed vendor geographical and ownership information such as "Company Name", "Country", "Province/State (Postal Code)", and "Street", helping you fully understand the manufacturer of that Mac address.
- Q: What if the entered Mac address cannot find vendor information?
- A: There are several possible reasons: 1. The Mac address may be a private address (Local Administered Address, LAA) or a randomly generated address, not corresponding to any public vendor OUI. 2. The database may not yet include the latest vendor information for that Mac address range. 3. Please carefully check if the entered Mac address is complete, correct, or has a format error.
- Q: How often is this tool's Mac address vendor database updated?
- A: This tool is committed to maintaining the latest Mac address vendor database. We update it regularly to include the latest OUI allocation information, but the global Mac address allocation is vast and constantly changing, so 100% coverage of all the latest or extremely rare allocations cannot be guaranteed.
Notes
- Please ensure that the entered Mac address is a valid 12-digit hexadecimal character combination, avoiding non-hexadecimal characters or insufficient/excessive length.
- The query results of this tool rely on the latest Mac address vendor database, but due to the dynamic nature of Mac address allocation and the existence of private addresses, for extremely new, extremely old, or private-use Mac addresses, no matching results may be found.
- The query results are for reference only, and vendor information may change over time (e.g., company mergers, OUI reassignments, etc.). It is recommended to supplement with other verification methods in critical applications.
