MACVendorLookup.com

Inspect the returned organization, address range and registry type when a coarse prefix match is insufficient. MACVendorLookup covers several IEEE registration block sizes. Its API documentation prefers the full address, explains that a short prefix may miss smaller blocks, and offers JSON, XML, CSV or pipe-separated output. It describes an empty 204 response for no match and throttling for excessive use. The homepage’s dated October 2026 update announces that the API is enabled again, while an undated paragraph farther down still describes the disabled service and a future beta. Treat the dated update as the current announcement; access was not tested. Registration addresses and vendor ranges describe the assignee, not the device’s current location or owner.