Old-school CIS service that looks like it was designed in 2012 and never touched since. Very clunky, but it works and covers 60+ countries, has long-term number rentals and even call forwarding if you need it. No more Russian numbers (left the Russian market due to new laws), but Kazakhstan, Ukraine, Kyrgyzstan and some other countries are still there. Though the prices aren't exactly the best and stock is often limited.