Free bulk MAC address lookup. Paste up to 100 MAC addresses, or a raw ARP table or DHCP lease dump, and identify the hardware vendor for every one in a single pass. Matched against the live IEEE registry (MA-L, MA-M and MA-S, updated daily) with longest-prefix matching, the MAC picked automatically out of each line, randomised addresses flagged, and the whole result set exportable as CSV. Built for network audits, ARP and DHCP analysis, and device inventories.
Nobody identifies devices one MAC at a time. You have a list: an ARP table, a DHCP lease dump, a switch MAC-address table, or an asset inventory, and you want to know the vendor behind every entry. Paste up to 100 addresses and this tool matches each one against the live IEEE registry in a single pass, resolving MA-L, MA-M and MA-S blocks with longest-prefix matching, then lets you export the whole result set as CSV.
The input does not have to be a clean list. Any common MAC format works, AC:DE:48:00:11:22, 00-1b-44-11-3a-b7, the Cisco f09f.c212.3456, or bare hex, in upper or lower case. You can also paste raw lines that contain other columns, such as arp -a output or a DHCP lease list, and the tool picks the MAC out of each line and ignores the IP addresses and interface names around it. Randomised (locally administered) addresses, the ones phones generate per network for privacy, are flagged rather than matched to a misleading vendor.
Paste your list into the box above, one MAC per line, up to 100. The tool identifies the vendor for every address in one pass and shows a summary of how many were identified, randomised, or unmatched.
Yes. The parser extracts the MAC from each line even when it is surrounded by other columns like IP addresses and interface names, so raw arp -a output or a DHCP lease dump works without cleaning it up first.
Yes. After a lookup you can copy the results as CSV or download a CSV file, with columns for the input, normalised MAC, OUI, vendor, IEEE registry, and status, ready to drop into a spreadsheet.
Those addresses have the locally-administered bit set, meaning they were generated by software rather than assigned from an IEEE block. Modern phones and laptops randomise their MAC per network for privacy, so there is no real vendor to report.
Need to identify a single address instead? Use the MAC Address Lookup tool.
