Contact Us

Administrative Office:
300 N Koeller
Oshkosh WI 54902
Local to Oshkosh 920.426.9192
Local to Appleton 920.955.9192
Toll Free 800.709.1818

Lobby Hours – 7:30 am to 5:00 pm Monday through Friday

Support Hours – 7:30 am to 5:00 pm Monday through Friday

Administrative/Billing Questions
invoice@ntdcorp.com

Technical Support:
Local to Oshkosh 920.426.9200
Local to Appleton 920.954.9799
Toll Free 888.919.8700
support@ntdcorp.com

Service Inquiries
inquiry@ntdcorp.com