InmateAid Ask the Inmate Letters & Photos Postcards & Greeting Cards Discount Calls Maryland Showing 21–25 of 80 results Sort by: Random Newest first Oldest first Title A-Z Title Z-A Random Somerset County MD Detention Center Featured 410-651-9223 St. Mary’s County Detention Center Featured 301-475-4200 MD DOC – North Branch Correctional Institution (NBCI) Featured 301-729-7400 MD DOC – Maryland Correctional Training Center (MCTC) Featured 240-420-1601 MD DOC – Southern Maryland Pre-Release Unit (SMPRU) Featured 301-274-4701 ← Prison and Jail Direcory → Letter