Dog Hobbyist: Mastiff Breeds
- Forum, photo gallery and events.
- http://forums.doghobbyist.com/forum.php?catid=119

Show Dog
- Breed forum. Handler information. Stud dogs.
- http://www.showdog.com/login/Breeds/philboard_forum.aspx?forumid=308

United Kingdom Mastiff Discussion Forum
- Discussion board for breed enthusiasts.
- http://www.englishmastiff.org.uk/board/index.php

Typey Mastiffs
- Companion site to Yahoo forum. Breeders share thoughts and ideas about type in relation to the breed standard for educational purposes. Interviews, contests, critiques, and litter announcements.
- http://www.populardog.com/typeymastiffs/

Yahoo Mastiff Group
- A mastiff fanciers e-mail group.
- http://groups.yahoo.com/group/mastiff/

Mastiff ShowSight
- Community for sharing educational information, stories, photographs, litter announcements, and rescue information.
- http://members5.boardhost.com/MastiffSight/

Mastiff Mailing List
- Discussion group for Mastiff owners, breeders and show and obedience exhibitors.
- http://groups.yahoo.com/group/EnglishMastiff/

Mastiff Health Mailing List
- Dedicated to health and genetic problems plaguing Mastiffs and other giant breed dogs. All topics regarding the health of Mastiffs are discussed including man-made, genetic and environmental.
- http://groups.yahoo.com/group/MastiffHealth/

English Mastiff Online Community
- Submit and browse articles and stories about Mastiffs.
- http://www.mastiffonline.com/