mobile prefix 手機號碼字頭

mobile prefix
繁：手機號碼字頭
简：手机号码字头

莫乃光認為政府應認真考慮業界建議，對促銷電話的最終受惠者施加刑責，編配指定號碼字頭予電話促銷者。

政府提3方案規管促銷電話　莫乃光：未提加強監管　治標不治本 （2017年5月11日）。明報，取自https://news.mingpao.com/ins/instantnews/web_tc/article/20170511/s00001/1494496901885

To further improve the effectiveness of such filtering, the government could require all telemarketing callers to use a certain phone prefix.

Hui, K. -L. (2016, April 14). Time for Hong Kong to stop the nuisance calls, to protect the public and the industry. South China Morning Post. Retrieved from http://www.scmp.com/comment/insight-opinion/article/1935848/time-hong-kong-stop-nuisance-calls-protect-public-and

Plan to use unlucky digit as mobile prefix draws fire from operators.
The Office of the Communications Authority launched a two-month public consultation on the matter yesterday, and proposed using new prefixes and recycling old numbers to generate extra mobile-phone numbers.

Leung, C. (2015, October 30). The number four furore: Hong Kong’s mobile operators at odds over whether to include ‘unlucky’ digit in new round of phone numbers. South China Morning Post. Retrieved from http://www.scmp.com/news/hong-kong/education-community/article/1873977/plan-use-unlucky-number-four-mobile-prefix-draws