In the United States, the Federal Communications Commission (FCC) established the NPAC to supervise and perform clearinghouse functions in support of local number portability (LNP) and local routing numbers (LRNs). See also LNP and LRN.
"NPAC." YourDictionary, n.d. Web. 19 August 2018. <http://www.yourdictionary.com/npac>.
NPAC. (n.d.). Retrieved August 19th, 2018, from http://www.yourdictionary.com/npac