"We are aware of the media reports out of Iran and we are gathering more information", Boeing spokesman Gordon Johndroe said in an email.
A plane carrying 176 people crashed in Iran early Wednesday morning shortly after take off, killing all on board.
Flight-tracking data shows a Ukrainian airliner in Iran soon after take off near Tehran on January 8.
"My honest condolences to the relatives and friends of all passengers and crew", Ukraine President Volodymyr Zelenskiy said in a statement, adding that Ukraine was seeking to establish the circumstances of the crash.
The National Security and Defense Council of Ukraine (NSDC) said that there were 11 Ukrainian citizens aboard the UIA plane.
The FAA said that it prohibited USA civilian aviation operators from flying in the airspace over Iraq, Iran and the waters of the Persian Gulf and Gulf of Oman.
Vadym Prystaiko said they were among the more than 170 people from seven countries on board the flight from Tehran to Kyiv.
Hours before this incident, Iran targeted U.S. military bases in Iraq.
Iranian officials said the pilot had lost control of the Boeing 737 jet after a fire struck one of the plane's engines.
The attack was in response to a U.S. drone strike that killed Iran's top military commander Qassem Soleimani. The 737 Next Gen does not have the software investigators linked to the fatal 737 Max crashes.
The Iranian side, the first ones to report the plane crash, blamed the mechanical issues for the crash.