Today when I was waiting for a plane to approach, another plane passed overhead high enough to be making a contrail, flying from east to west north of Austin. I took a picture but didn’t recognize the livery. It took a while, but I think I identified it as Alitalia, the livery with a straight line down the fuselage. I didn’t find the plane on my receiver data, nor did I find it on flightaware or flightradar24, although it’s possible I just missed it. Time shot was 4:26 Central daylight time. Is there some way to identify the plane given this information?