While the world was distracted with President Donald Trump leaving office on Jan. 20, an obscure Florida company discreetly announced to the world’s computer networks a startling development: It now was managing a huge unused swath of the Internet that, for several decades, had been owned by the U.S. military.

What happened next was stranger still.

The company, Global Resource Systems LLC, kept adding to its zone of control. Soon it had claimed 56 million IP addresses owned by the Pentagon. Three months later, the total was nearly 175 million. That’s almost 6 percent of a coveted traditional section of Internet real estate — called IPv4 — where such large chunks are worth billions of dollars on the open market.

The entities controlling the largest swaths of the Internet generally are telecommunications giants whose names are familiar: AT&T, China Telecom, Verizon. But now at the top of the list was Global Resource Systems — a company founded only in September that has no publicly reported federal contracts and no obvious public-facing website...

The change is the handiwork of an elite Pentagon unit known as the Defense Digital Service, which reports directly to the secretary of defense. The DDS bills itself as a “SWAT team of nerds” tasked with solving emergency problems for the department and conducting experimental work to make big technological leaps for the military...

https://www.washingtonpost.com/technology/2021/04/24/pentagon-internet-address-mystery/