WHAT 100 dollars bills out of circulation in US?

In the United States, certain series of $100 bills can be considered out of circulation if they are no longer accepted as legal tender or have been replaced by newer designs. For example, older series such as the 1996 and earlier versions are generally not in circulation anymore, as the U.S. Treasury has introduced newer designs with enhanced security features, like the 2013 series featuring a blue security ribbon and a larger portrait of Benjamin Franklin. However, these older bills can still be exchanged at banks or the Federal Reserve. Collectors may also seek them, but they are not commonly used in everyday transactions.