The Yoga Centers and Teachers I'm listing below are fellow Ashtangi's dedicated to preserving the traditional Ashtanga Yoga practice.  I know each of the teachers/center owners personally, study with them yearly at the AYRI in Mysore, India and highly recommend that you seek them out when you travel to their area of the globe :)

Yoga Centers

USA

Miami Life Center - Miami, Florida

White Orchid Yoga - Clearwater and Tampa, Florida

Ashtanga Yoga Upper West Side - New York

Woodley Park Yoga - Washington, DC

Ashtanga Yoga Bend - Bend, Orgeon

Absolutely Ashtanga - Sacramento, California

Balance Yoga and Wellness - New Orleans, Louisiana

Hamunam Ashtanga Yoga - Wilmington, North Carolina

International

Bristo Yoga School - Edinburgh, Scotland

The Yoga Room - Edinburgh, Scotland

Ashtanga YoYogi - Tokyo, Japan

The Yoga Space - West Perth, Australia

Ashtanga Yoga Victoria - Victoria, Canada

Yoga Teachers

Kino Macgregor

Manju Jois