Routing Number is a nine-digit numeric code printed on the bottom of checks that is used to facilitate the electronic routing of funds (ACH transfer) from one bank account to another.
Answer Wiki. Gus Fring might have been based on Eugenio Berrios, a biochemist who worked for General Pinochet and was a prominent figure in DINA, the Chilean intelligence agency during the dictator's rule. During his rule, Pinochet supplemented his personal income by producing cocaine and selling it on to Europe and the United States.
Acording to what you see as Gus Fring character, I strongly belive he's not chilean, and use these nationality as back up for he's meth bussines. When he talks about his past at Hank, he mention how in Chile records back inthe 80's are a bit loose, thats an open window for a second identity.