Moscow and New York (May 21, 2004) - Open Joint Stock Company "Vimpel-Communications" ("VimpelCom" or the "Company") (NYSE: VIP) announced today that it will webcast its conference call on its first quarter 2004 financial results on Thursday, May 27, 2004, at 6:30 p.m. Moscow time (10:30 a.m. EDT). The conference call will be hosted by Alexander Izosimov, Chief Executive Officer. He will be joined by Elena Shmatova, Chief Financial Officer, Nikolai Pryanishnikov, First Vice President - Commercial Director, and Valery Goldin, Vice President of International and Investor Relations. The press release announcing the Company's first quarter 2004 financial results will be available on the Company's web site, located at https://www.vimpelcom.com, prior to the conference call.

The Company's management will discuss its first quarter 2004 results during a conference call and slide presentation. The call and slide presentation may be accessed via webcast at the following URL address https://www.vimpelcom.com. For those who will be unable to listen to the live slide presentation webcast, it will be archived on the Company's web site until June 28, 2004.

VimpelCom is a leading provider of telecommunications services in Russia, operating under the "Bee Line GSM" brand. The VimpelCom Group's license portfolio covers approximately 92% of Russia's population (134 million people), including the City of Moscow, the Moscow Region and the City of St. Petersburg. VimpelCom's ADSs are listed on the New York Stock Exchange under the symbol "VIP".

For more information, please contact:
Valery Goldin
VimpelCom (Moscow)
Tel: 7(095) 974-5888
vgoldin@VimpelCom.com

Christopher Mittendorf
Edelman Financial Worldwide
Tel: (212) 704-8134
christopher.mittendorf@edelman.com