A little over four business days in, the bid total in the FCC's latest 5G spectrum auction continues to build, topping $600 million.

The total after a dozen rounds was $604,948,455, with New York drawing the highest bid so far at $13,098,000, followed by L.A. at $10,076,000, which together cover a population of about 40 million. There are 2,909 licenses in the 24 GHz high-band (millimeter wave) band up for grabs.