What to know about Starshield, SpaceX's military-focused Starlink service

Uncertainty over who controls SpaceX's military satellite system, Starshield, has drawn renewed attention, as restrictions on the technology hinder Ukraine's defenses.

Ukraine has accused SpaceX -owned Starlink of restricting its military-grade services, known as Starshield, as Russia intensified attacks on Kyiv.

Officials in Kyiv said SpaceX had imposed restrictions on Starshield without advance notice, disrupting military operations and hampering efforts to protect civilians amid intense Russian attacks this week.

In response, SpaceX CEO Elon Musk appeared to shift responsibility for any changes to Starshield's use in Ukraine to the U.S. government and President Donald Trump. He said that Starshield systems are owned and controlled by Washington, with the U.S. military and ultimately the president determining any limits on their use. The White House and the Pentagon didn't immediately reply to CNBC's request for comment.

Here's what to know about Starshield, and how it differs from Starlink.

Starshield is SpaceX's satellite network designed for government and national security use, building on the technology and launch capabilities of its Starlink service.

According to SpaceX, Starshield currently focuses on Earth observation, secure global communications for government users, and so-called "hosted payloads," which refers to hosting specialized equipment aboard satellites for customers.

Unlike Starlink, which serves consumers and businesses, Starshield offers enhanced security features, including high-assurance cryptographic capability designed to handle classified information. It says its satellites can handle a range of equipment and connect with other satellites through laser communications technology.

SpaceX was awarded over $6 billion in multi-year U.S. government contracts for Starshield, primarily from two major Space Force contracts for low Earth orbit-based communications and sensing constellations, SpaceX said in its latest earnings report.

Musk on Wednesday distinguished Starshield from SpaceX's commercial Starlink service, which he said was restricted to civilian and defensive purposes and could not be used for offensive military operations.

Although Starshield serves a different purpose from Starlink's commercial internet service, which provides high-speed connectivity to regular people, the two are closely connected.

Starlink is SpaceX's general satellite internet service, sold for consumer, civilian, and defense purposes, and offers internet access in remote areas where it has traditionally been limited.

Starshield uses stronger encryption and specialized terminals for secure communications, but relies on Starlink's extensive satellite network to operate.

According to SpaceX, Starlink operates in more than 160 countries, territories and other markets, offering residential plans starting at $55 per month. The company says its service can deliver download speeds exceeding 400 megabits per second in most locations.