The National Institute of Standards and Technology‘s Internet Time Service received requests from 316 million unique Internet Protocol addresses on two out of 20 NIST servers to represent 8.5 percent of all Internet-connected devices.

This data comes from one month of a study conducted on the service published on Tuesday for the first time, NIST said Tuesday.

NIST physicist Jeff Sherman and co-author Judah Levine studied two of NIST’s 20 time information servers for the “Usage Analysis of the NIST Internet Time Service” report due to their accessibility and capacity to host 25 percent of total traffic.

Levine, an NIST fellow, conceptualized and built most of the Internet Time Service software that NIST has operated since 1993, NIST noted.

The service’s 20 timeservers are located at 12 sites across the country and are linked to the NIST time scale, which the agency estimates to receive 16 billion requests per day as of January 2016.