MNPalso: エムエヌピーFreq.FrequencyTop 50,000Meanings1nounmobile number portability; MNPTechnical term used in the mobile phone industry; refers to the ability to keep one's phone number when switching carriers.MNPを利り用ようして、他た社しゃに乗のり換かえた。I switched to another carrier using MNP.