I noticed that last year. and looked it up.
They're old satellites that are spinning and once in a while catch the reflection of the sun and are really bright for a while, then disappear and then you see them a little later.
Aol Instant Messenger? kek…
probably changed numbers.
one phone call and you can switch numbers via voip, which is most services.
Speaking of changing numbers.
When I worked as tech support,
Someone from the Obama campaign called in
and changed 30 numbers and names.
I thought it was odd.
filter and move on