According to, (yes, I know) Wikipedia, you are correct:
The fleet's "Janet" call sign is said to stand for "Just Another Non-Existent Terminal"[3][4] or "Joint Air Network for Employee Transportation".[5]
Love the first paragraph:
Janet and Janet Airlines are unofficial names of a highly classified fleet of passenger aircraft operated for the United States Department of the Air Force[1] as an employee shuttle to transport military, DoD civilians, and contractor employees to Special Access Program Facilities (SAPF). The airline mainly serves the Nevada Test and Training Range (most notably Area 51 and the Tonopah Test Range) from a private terminal at Las Vegas's Harry Reid International Airport.[2]
According to, (yes, I know) Wikipedia, you are correct:
Love the first paragraph: