AT&T PrePaid Phone Card 120min
I found an old PrePaid Phone Card that was used to call home while stationed overseas in the military.
The access number is 1-800-569-6972
When I tried to check balance at https://www.virtualprepaidminutes.com/CheckBalance.aspx
it returns an error of invalid access number /pin
The "CARD #" under the scratch off is 12 digits long not a 10 digit PIN like other cards I have that all had verified balances at the website above.