macaddress.io is a vendor lookup service built around MAC addresses, OUIs, IABs, and IEEE registration data. Users can enter a MAC address or OUI to retrieve information such as the registered vendor, address, country code, registration/update time, address block boundaries, and assignment type. It can also determine whether an address is valid, registered, or part of a private block.
Its core value lies in packaging MAC address parsing and vendor databases into both an API and downloadable databases. The API supports JSON, XML, CSV, and vendor-only text responses, with authentication via either URL query parameters or a Header Token. Beyond basic vendor lookup, it also offers virtual machine detection, Multicast/Unicast identification, Universally/Locally administered checks, possible application descriptions, and some Wireshark notes. This makes it suitable for asset identification, access control, allow/deny lists, unauthorized device checks, and traffic management.
Developer support is fairly complete: Python, PHP, and Node.js client libraries are available, along with the maclookup-cli command-line tool. On the ecosystem side, the content explicitly mentions integrations with MISP, YETI, and Splunk modules, making it useful for security teams that need enrichment in threat intelligence or log analysis workflows. Offline data can be downloaded as JSON, CSV, XML, and Cisco vendorMacs.xml, which helps with integration into existing systems or batch lookups on internal networks.
The site states that its MAC vendor data comes directly from the IEEE Standards Association on a daily basis, and that it has accumulated historical OUI information since 1997. This is helpful for accuracy and historical tracing. The documentation shows request URLs, parameters, output formats, and authentication methods, so getting started appears straightforward. However, the captured content did not show more complete details on rate-limiting policies, SLA, licensing terms, error codes, or enterprise support.
The API offers 100 free requests per day with no credit card required, which is friendly for testing and small-scale tools. The complete database is available by subscription, but the content does not list pricing. Its strengths are detailed data fields, multiple formats, and broad integration options. Its weaknesses are limited transparency around commercial details, and self-hosting appears to be limited to database downloads, with no clear indication of whether a full API service can be deployed.
It is suitable for network administrators, security analysts, enterprise IT teams, developers, and research institutions. The content does not provide information about access from China, so this remains unknown. If access or payment is restricted, alternatives include official IEEE data, the Wireshark OUI database, or a self-built offline OUI lookup database.
β This review is compiled from public sources and does not constitute a purchase recommendation. Verify all facts on the vendor's official site. Verify on macaddress.io official site.
macaddress.io is an Unknown Dev Tools provider. TG4G tracks its product information, an overall rating of 8.0/10, and a China-accessibility score of China direct-connect friendly. Click "Visit Official Site" to reach macaddress.io directly.