In the early 1990s, businesses started offering reverse telephone lookups for fees, and by the early 2000s advertising-based reverse directories were available online, prompting occasional controversies revolving around privacy.
ɪnðɪ ˈɜːli nˈaɪntiːnhˈʌndɹɪd nˈaɪnti z, bˈɪznəsᵻz stˈɑːɹɾᵻd ˈɔfɚɹɪŋ ɹᵻvˈɜːs tˈɛlᵻfˌoʊn lˈʊkʌps fɔːɹ fˈiːz, ænd baɪ ðɪ ˈɜːli tˈuː θˈaʊzənd z ˈædvɚtˌaɪzɪŋbˈeɪst ɹᵻvˈɜːs dᵻɹˈɛktɚɹiz wɜːɹ ɐvˈeɪləbəl ˈɑːnlaɪn, pɹˈɑːmptɪŋ əkˈeɪʒənəl kˈɑːntɹəvˌɜːsiz ɹᵻvˈɑːlvɪŋ ɚɹˈaʊnd pɹˈaɪvəsi.