(AU)Petsafe - Enables owners to register a pet's microchip number and collar tag number. Site also features shopping, articles, forums, and lost and found lists.
KeePet - Nationwide pet identification tag and registration service.
Pet Club of America - Provides the Petfinders lost and found service with an online database, faxes to shelters, guidance, tags, 24-hour hot line; travel assistance.
