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. 15 May 2018. <http://www.yourdictionary.com/npac>.
NPAC. (n.d.). Retrieved May 15th, 2018, from http://www.yourdictionary.com/npac