How do I see connected accounts to a phone number I used to have a couple years ago

[larrysiii.lsi]

I found an old number I used to have, how do I see what's connected to it and old call history and contacts

 

[rgd1101]

Find an old number? do you mean and number you don't own anymore?
For you call history / contact your service provider check your old phone or contact your service provider for the call history.