Back when I was working at Tinker AFB the procedure was when you had to make along distance call you called the operator and told them the number you wanted to call. They would call you back when they were ready to put the call through. Then you'd often get some company operator on the other end and explain what you needed to know. And then you'd often get routed around until you found the knowledgeable person. And then when you finally got through and were discussing the technical info you required you'd get cut off because you were limited in the number of minutes you could talk. So, when you finally found who you needed to talk to the first thing was to quickly find his actual personal name and number and give him your actual phone number in case you got cut off.
The reverse could occur, too. I called my old outfit over 25 years after I had left there in order to get come info to support a study for NASA. I looked at the organization webpage, made a guess as to which organization as the right one, called the Tinker AFB operator and asked for the number for that office. She had nothing listed for that. So I tried another organization listed on the website and got the same results. Finally I somehow managed to get a helpful Lt Col on the line and with his help found the organization I was looking for. When they picked up the phone I said, "Hi! I used to work there!" The gentleman who answered the phone responded, "Do you want to come back?" When I told him I had a heck of a time finding their phone number and the website info did not resemble the actual organization structure he replied, "I am not surprised. We've been reorganized three times in the past year."
Nope, I don't wanna go back....