Suzhou: Officially promoted on April 20, 2002 (the local telephone network in Suzhou will cancel the 0520 area code and use the 0512 area code uniformly)
Since the reform and opening up, Suzhou’s telecommunications industry has also been improved It has made great progress: the first program-controlled telephone exchange was opened in 1988. In August 1994, the telephone network number of Suzhou City (including Wuxian County) was raised to 7 digits. In December 1995, the Suzhou local network was built, and 0512 and 0520 were activated. area code, the telephone number of the entire district was increased by 7 digits. At the end of June 1997, the total capacity of Suzhou's local telephone network office exchanges exceeded 2 million for the first time among prefecture-level cities in the country. On April 20, 2002, Suzhou's fixed line was upgraded.