The group can be found here:

Please note that this is not a public building and there is no janitor or door bell. Therefore we kindly ask you to arrange an appointment via phone call or email.

Thanks to the kind cooperation of the SECT group we are able to receive internal mail via the shorthand "TEL 16". Please send exam enrolments ("yellow sheets"), thesis registrations etc. there, they will reach the group with a small delay.

Please use this mail address for all other shipments. Note the different street (which identifies the central mail hub of the PTB in Berlin-Charlottenburg) and the inclusion of the group ID, so mail is routed properly inside PTB: