On July 1, 2025, the Asteroid Terrestrial-impact Last Alert System (ATLAS) detected the interstellar object (ISO) 3I/ATLAS, marking it as the third ISO observed in eight years. Following the precedent set by 1I/'Oumuamua and 2I/Borisov, scientists at the SETI Institute conducted a technosignature search to determine if the object exhibited signs of extraterrestrial technology. Using the Allen Telescope Array at the Hat Creek Radio Observatory, researchers scanned 3I/ATLAS for over seven hours across radio frequencies from 1 to 9 gigahertz (GHz). They initially identified 74 million narrowband signals, filtering them down to 211 signals of interest, none of which were found to be artificial. The study established upper limits on potential signals, ruling out any stronger than approximately 10-110 watts. The findings, published in The Astronomical Journal, highlight the importance of ongoing searches for technosignatures from ISOs, as they provide insights into planetary system formation and the natural properties of objects ejected from star systems.