NCIC Inmate Communications (NCIC) owns and operates the largest employee-held inmate telephones company in the world. As of June 2019, the company served a total of over 750 prisons in over 8 countries. [1] and is certified in all US states and Canada.[2] Headquartered in Longview, Texas, NCIC processes over 500,000 calls per day. References[edit] ^ Inmate telephone services ncic.com ^ "Certification". careertrend.com. Retrieved October 1, 2017.