I jsut added airtime to my dad's Nokia 2126 (will add a double minute card to my mom's later today) and was looking for some good promotional codes...so, from Yahoo Groups' tracfone_users database here are the good ones:
58695 - 100 extra units on a 1-year card
51283 - 60 extra units on a 60+ minute card
51206, 56024, 52636, 56084, 55698 - 20 extra units on a 60+ minute card
58298 - 30 extra units on a 60+ minute card
57676 - 30 extra days on a 60+ minute card
Those are the best ones, as far as I can tell, taht are still working. Take a look at the Tracfone_Users Yahoo group for more...hope this helps everyone!