wɪððɪ ˌɪntɹədˈʌkʃən ʌvðə zˈiəɹoʊ twˈɛnti ˈɛɹiə kˈoʊd, æz pˈɑːɹt ʌvðə bˈɪɡ nˈʌmbɚ tʃˈeɪndʒ, səbskɹˈaɪbɚ nˈʌmbɚz wɜː tʃˈeɪndʒd fɹʌm sˈɛvəndˈɪdʒɪts ˌɛksˌɛksˈɛks ˌɛksˌɛksˌɛksˈɛks tʊ ˈeɪtdˈɪdʒɪts ˌɛksˌɛksˌɛksˈɛks ˌɛksˌɛksˌɛksˈɛks.
With the introduction of the (020) area code, as part of the Big Number Change, subscriber numbers were changed from 7-digits (xxx xxxx) to 8-digits (xxxx xxxx).