JOINT FILING AGREEMENT

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                                                                       EXHIBIT A

                             JOINT FILING AGREEMENT

         The undersigned hereby agree that the statement on Schedule 13D with
respect to the common stock of Open Joint Stock Company "Vimpel-Communications",
dated as of June 11, 2001, is, and any amendments thereto (including any
amendments on Schedule 13G) signed by each of the undersigned shall be, filed on
behalf of each of us pursuant to and in accordance with the provisions of Rule
13d-1(k) under the Securities Exchange Act of 1934.

Date:  June 11, 2001                       ECO TELECOM LIMITED

                                      By:  /s/ Dmitri Ploujnikov
                                           ....................................
                                           Dmitri Ploujnikov
                                           Director

Date:  June 11, 2001                       ECO HOLDINGS LIMITED

                                      By:  /s/ Xxxxxx Xxxx
                                           ....................................
                                           Xxxxxx Xxxx
                                           Director


Date:  June 11, 2001                       CTF HOLDINGS LIMITED

                                      By:  /s/ Xxxxx Xxxx
                                           ....................................
                                           Xxxxx Xxxx
                                           Director


Date:  June 11, 2001                       CROWN FINANCE FOUNDATION

                                      By:  /s/ Xx. Xxxxxxx Xxxxxx
                                           ....................................
                                           Xx. Xxxxxxx Xxxxxx
                                           Director



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