The American Animal Hospital Association (AAHA) hosts the Pet Microchip Lookup Tool. The United States national microchip search tool is online at aaha.org/petmicrochiplookup. It is free to use. Thousands of microchip numbers are checked through the AAHA system daily!
Note: All pets registered at BuddyID.com are automatically & immediately trackable in the Pet Microchip Lookup network.