This number is to a company called Prison Call Solutions (PCS). They help inmates and their families have less expensive phone charges by deposing funds into an account that serves as a local calling card, to avoid long distance charges. this company serves all US jail facilities, hence all the different caller ID locations.
This is either prepaid calls or requests for collect call acceptance from Federal Prisons throughout the United States. If you have someone on the inside, this is from them. If you do not, don't sweat it.
I keep getting calls from this number I do not know anyone in a correction facility there named AL..don't know who this person is or how they got my number!