For zone I, Syniverse has been appointed with the MNP and related issues while for zone II, it is Telcordia.
Mobile number portability - telephone number portability for mobile phone users
Mobile, Alabama | T-Mobile | mobile phone | Mobile phone | Mobile | Mobile Suit Zeta Gundam | Windows Mobile | mobile | Mobile Suit Gundam | Virgin Mobile | Boost Mobile | Lucky Number Slevin | Reynolds number | Mobile app | Mach number | serial number | Random number generation | Mobile Bay | International Standard Book Number | Universal Mobile Telecommunications System | SoftBank Mobile | prime number | Personal identification number | number | Two in a Million/You're My Number One | Stuck Inside of Mobile with the Memphis Blues Again | Social Security number | Rikki Don't Lose That Number | Prime number | Premium-rate telephone number |