In before anything squawks as AF1
In before I fall asleep....a new record to get in before 450 or500 posts.
Squawking is what aviation transponders do. A squawk code is a 12 binary digit, with 4 digits read as octal, that is, each one is 0 through 7, (apparently) leaving out 8 and 9. There are no alphabetic codes (e.g., 'A' or 'F') among those squawked.
There are 512 (2^12) discrete codes that can be squawked in a single aviation airspace. Squawk codes may change for the same aircraft as a craft moves from one controlled airspace to another. There may be more than 500 aircraft in a given airspace, but likely many of them are "squawking 1200," which is a generic, non-controlled aircraft designation.
There is no conventional transponder squawk code associated with Air Force One.
Air Route Traffic Control Center (ARTCC) uses aircraft call signs as identifiers on aviation (voice) radio frequencies for various aircraft. Among those is where the call sign "Air Force One" may be heard.