Wikipedia
Peter-Service — a billing company in Russia that provided the first Russian billing system for mobile operators. The Company was established in 1992.
Nowadays the list of Peter-Service's Customers comprises more than 50 operators in Russia, CIS and Europe, including Multiregional Transit Telecom, MegaFon, Mobile TeleSystems, Rostelecom, SkyLink, Peterstar; operators of Svyazinvest and foreign operators: Kyivstar, Vodafone Romania, Turkcell, 21st Century Technologies Limited Nigeria and others.
Peter-Service is a partner of IBM, Intel, HP, Oracle, Sun Microsystems. The company is also an associated member of the International GSM Association, the Infocommunication Union (ex-3G Association), TM Forum and ETSI.
Peter-Service employs about 900 specialists. The Company's HQ is located in St. Petersburg, and the network of branch offices operates in Moscow, Novosibirsk, Krasnodar, Ekaterinburg, Samara, Vladivostok and Kiev.