The story
Southern Telecom was created on the basis of the merger of Kubanelektrosvyaz together with regional telecommunications companies:
Karachayevo-Cherkesskelektrosvyaz
Svyazinform of Astrakhan Oblast
Elektrosvyaz of the Republic of Kalmykia
Elektrosvyaz of Stavropol Krai
KabBalkTelecom
Sevosetinelektrosvyaz
Elektrosvyaz of the Republic of Adygea
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Rostovelektrosvyaz
Volgogradelektrosvyaz
Dagsvyazinform
Administration of Electronic Telecommunication of the Republic of Ingushetia (Ingushelectrosvyaz)
Elektrosvyaz of the Chechen Republic
Kuban GSM
The company's area of responsibility had a population of over 18 million people.
Southern Telecom's stock traded on the RTS, MICEX, Nasdaq, Frankfurt, Berlin and Vienna stock exchanges.
Following Svyazinvest's liquidation in 2011 the company was merged into Rostelecom.
From Wikipedia’s article on Southern Telecom, shared under CC BY-SA 4.0.4