ɐkˈoːɹdɪŋ tʊ ɪts wˈɛbsaɪt ɪn ˈeɪpɹəl tˈuː θˈaʊzənd twˈɛnti wˈʌn, sˈɪɾi sˈaɪtsiːɪŋ hæd ˌɑːpɚɹˈeɪʃənz ɪn sˈɛvənti ˈeɪt sˈɪɾiz ɪn θˈɜːɾi wˈʌn kˈʌntɹiz.
According to its website in April 2021, City Sightseeing had operations in 78 cities in 31 countries.