After the reunification, in two steps, a uniform numbering scheme was introduced, which included the lines in the state of Brandenburg. The Berlin tram was assigned the line number range from 1 to 86, then followed by the overland operations in Woltersdorf, Schöneiche and Strausberg with the numbers 87 to 89. The Potsdam tram received the 90s line numbers. E-lines were no longer listed separately in the timetable, but the amplifiers continued to operate as such until 2004. Night lines were indicated on both means of transport by a preceding N and the three-digit line numbers were henceforth intended for the bus routes. The first conversion of 2 June 1991 followed the Berlin tram lines on 23 May 1993. The network was reorganized and divided into five number ranges. The main focus was on the focus on the historical center. Single lines formed the radial main network, 10 lines their supplementary network. 20er lines were intended for the ring and Tangentiallinien. There were 50 lines in the district of Pankow, 60 lines in the district of Köpenick analogous to the bus lines there.