A Royal Australian Air Force employee, a pregnant woman and a working taxi driver are among more than 80 alleged buyers and sellers of cocaine charged in the second police blitz on so-called "dial-a-dealer" drug networks this year.

The crackdown netted almost $70,000 in cash, more than 350 grams of cocaine, five grams of MDMA and five grams of cannabis.

Strike force detectives discovered Red Bull and Coca-Cola cans as well as internal car compartments that had been tampered with in an effort to allegedly hide drugs in cars used for the ongoing supply of cocaine within the Central Metropolitan Region.

Police across Sydney charged 84 people as part of the targeted covert operation which ran on six nights over three weeks in November and December.