Mailing Address
All correspondence should be addressed to:
PTC/USER, Inc.
51 Harborview Road
Hull, Massachusetts 02045
USA
Phone and Fax Numbers
Phone:
(877) 878-USER or (877) 878-8737 (toll-free in USA)
(781) 780-5647 (toll and international calls)
Fax: (781) 780-5648
E-Mail Addresses
You can contact various PTC/USER departments via e-mail:
General information: info@ptcuser.org
Address Changes: membership@ptcuser.org
Help with Forums or Portal: support@ptcuser.org



