Mastfrog is a limited liability company, registered in Massachusetts.
We can be contacted by postal mail at our registered address:
Mastfrog, LLC
PO Box XXXX
Hatfield, MA, 01038
but we encourage you to use our contact form for correspondence. Business inquiries can be made to info@mastfrog.com.
Trademarks
The names Mastfrog and Mixen are pending word-marks with the US patent office.