X0303 4 2009-03-17 0000879573 CENTENNIAL COMMUNICATIONS CORP /DE CYCL 0001212994 RATHER JONATHAN M C/O WELSH, CARSON, ANDERSON & STOWE 320 PARK AVENUE, SUITE 2500 NEW YORK NY 10022 0 0 1 0 Common Stock 2009-03-17 4 S 0 17381 8.21 D 0 I By WCAS Management Corporation The Reporting Person is the controlling stockholder of WCAS Management Corporation. Pursuant to Instruction (4)(b)(iv) of Form 4, the Reporting Person has elected to report as indirectly beneficially owned the entire number of securities beneficially owned by such entity. The Reporting Person disclaims beneficial ownership of any securities, and any proceeds thereof, that exceed his pecuniary interest therein and/or that are not actually distributed to him. The Reporting Person also directly beneficially owns 17,515 shares of Common Stock and indirectly beneficially owns 19,122,000 shares of Common Stock held by Welsh, Carson, Anderson & Stowe VIII, L.P. The Reporting Person is a managing member of the sole general partner Welsh, Carson, Anderson & Stowe VIII, L.P. Pursuant to Instruction (4)(b)(iv) of Form 4, the Reporting Person has elected to report as indirectly beneficially owned the entire number of securities beneficially owned by such entity. The Reporting Person disclaims beneficial ownership of any securities, and any proceeds thereof, that exceed his pecuniary interest therein and/or that are not actually distributed to him. /s/David Mintz, Attorney-in-Fact 2009-03-19