Why is ir saying restricted number why my inmate tries to call me

MIght be Securus blocking your line to prohibit you from saving money. Here is what the Federal Communications Commission (FCC) has to say about their illegal tactics: 

Commission Ruling Opens Doors For Low-Cost Call Routing Service For Inmates And Their Families 
https://apps.fcc.gov/edocs_public/attachmatch/DOC-323495A1.pdf
Petition for Declaratory Ruling of Securus Technologies, Inc - EDOCS
https://apps.fcc.gov/edocs_public/attachmatch/DA-13-1990A1.pdf