Contact Customer Service

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Fixed Telephony General Account Enquiries
Tel:       0800 100 56 76 (Mon-Fri, 08:30-19:00)
Fax:      06966 983 103

Mobile 
Tel:       01803 000 933 (Mon-Fri 08:00-19:00, Sat 10:00-14:00) 0.09€/minute for calls from fixed lines
Fax:      06966 983 103

Postal Address - Standard Mail
ACN CommunicationsGmbH
Postfach 70 01 63
60551 Frankfurt

VoIP:
ACN CommunicationsGmbH
Postfach B 002
60551 Frankfurt

Postal Address - Registered Mail
ACN CommunicationsGmbH
Hans-Thoma-Strasse 24
60596 Frankfurt am Main