A number of years ago, we had a dog come into the shelter wearing a dog tag; the tag was a welcome sight because very few animal wear them. The tag proved to be nearly untraceable.
The tag was from Jefferson County and failed to have the area code with the phone number. It is amazing the number of Jefferson Counties that exist.
Please, anytime you are printing an identification tag, include sufficient information, in the event that the animal is found several States away. At a minimum, include the State and area code. Please take a critical look at your tags to see if they contain sufficient information to get the animal returned home. The tag might be the only identification on the animal and animals are known to travel with their owners over great distances.