Logo of the Physikalisch-Technische Bundesanstalt
View of the Mainflingen long-wave radio station for transmission of the DCF77 signal:  transmitter building (in the back), antenna building (yellow bricks) and antenna masts.

Dissemination of time via the public telephone network

PTB telephone time service under the number 0531 512038

The PTB's telephone time service under the telephone number 0531 512038 continues to enjoy great popularity and we receive more than 1300 calls per day.

Since December 2019, the ISDN connection has been transferred to an IP-based one.

However, access to the telephone time continues to be in ASCII code via modems according to CCITT-V.22 with the following transmission parameters: 1200 baud, full duplex, 8 data bits, no parity, one stop bit.

For further information please contact time(at)ptb.de via e-mail.