I opened a route from midway to reno and was the only airline operating the route. A few minutes later while assigning my IFS I saw that I only had one aircraft and one operating route MDW-SLC so I looked at the route and It said an airline called Jet.com was the new operator with the same aircraft I had the boeing 737-400 with 18C and 211Y. I am not sure how this happened, I hope however there is some explanation to this problem.