X0202 4 2007-04-10 0000879573 CENTENNIAL COMMUNICATIONS CORP /DE CYCL 0001212989 MCINERNEY THOMAS E C/O WELSH, CARSON, ANDERSON & STOWE 320 PARK AVENUE, SUITE 2500 NEW YORK NY 10022 1 0 1 0 Common Stock 2007-04-10 4 J 0 3000000 D 2833053 I By Welsh, Carson, Anderson & Stowe VII, L.P. Common Stock 2007-04-10 4 J 0 37013 A 502997 D In kind distribution of shares by Welsh, Carson, Anderson & Stowe VII, L.P. to its partners. The Reporting Person is a general partner of the sole general partner of Welsh, Carson, Anderson & Stowe VII, 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. The Reporting Person also indirectly beneficially owns 204,669 shares of Common Stock held by WCAS Information Partners, L.P., 4,879,521 shares of Common Stock held by WCAS Capital Partners III, L.P. and 43,122,000 shares of Common Stock held by Welsh, Carson, Anderson & Stowe VIII, L.P. The Reporting Person is a general partner of the sole general partner of WCAS Information Partners, L.P. and a managing member of the respective sole general partners of Welsh, Carson, Anderson & Stowe VIII, L.P. and WCAS Capital Partners III, 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 each such entity. The Reporting Person disclaims beneficial ownership of any securities, & any proceeds thereof, that exceed his pecuniary interest therein and/or that are not actually distributed to him. /s/Jonathan M. Rather, Attorney-in-Fact 2007-04-10