At the end of 1844, the Taunusbahngesellschaft set up an electromagnetic telegraph along the Wiesbaden-Kastel railroad line. In 1856, the first telegraph station was built in Wiesbaden. On 08.12.1885, the Wiesbaden telephone exchange was put into operation. Of around 55,000 inhabitants, 68 had telephone connections, rising to 88 the following year, at an annual cost of 150 gold marks. All connections were plugged by hand and around 180 calls were made every day.

In 1891, the town of Biebrich followed suit with a telephone exchange in the post office building on Wiesbadener Straße. By 1895, the number of telephone connections in Wiesbaden had risen to 480, from which around 2,100 calls were made every day. In 1910, there were around 3,900 connections. 76 employees were needed to handle 30,000 calls a day. In 1928, a public telephone booth was set up in the milk house on Mauritiusplatz

In the 1950s, the era of self-dialing telephone services began; the "Fräulein vom Amt" became the "Dame von der Auskunft". In 1977, for example, the staff provided more than 2.5 million pieces of information.

At the beginning of the 1980s, the local networks in Wiesbaden, as in the rest of Germany, were converted to local services and thus to a new telephone tariff system; for many customers, telephoning became significantly cheaper. The privatization of telecommunications, advancing digitalization and the emergence of mobile telephony in the 1990s gave a new boost to development.

Today, there are more cell phones in Wiesbaden than inhabitants. On the other hand, almost all telephone boxes have disappeared from the cityscape. The networking of telephone and Internet has meant that anyone can now be reached without a traditional telephone connection.