United States of America

Listed approx. SW->NE (and back down the E. coast)

California (Southern)
West Hollywood, CA (or maybe sometimes it's in Culver City?)
(310) 360-1096 or (800) 345-5425
http://www.impactpersonalsafety.com
(IMPACT)

AND

California (Southern)
Corona, CA
(800) 590-4687
http://www.modelmugging.org/
(Model Mugging)

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California (Northern)
Oakland, CA 94606
(510) 208-0474
http://www.impactbayarea.org
(IMPACT)

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OR/WA/ID/CA (Northern)
Portland, OR
(503) 764-8344
http://www.prepareportland.org/
(IMPACT)

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New Mexico
Santa Fe, NM
(505) 992-8853
http://www.impactpersonalsafety.org
(IMPACT)

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CO/WY/UT/KS/NE (in development)
Denver, CO
(303) 408-0748
AmeliaDorn at yahoo dot com
(IMPACT)

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CO/WY/UT/KS/NE
Broomfield, CO (Denver area)
(720) 566-0677
(Long URL)
(Affiliation unknown)

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TX/LA/AR
The Woodlands, TX (near Houston)
(281) 447-7384
http://www.pdtgroup.net
(IMPACT)

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ND/MN
Grand Forks, ND
(701) 777-4300
http://www.und.edu/dept/womenctr/
(IMPACT?)

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IL/IN/WI
Chicago, IL
(773) 338-4545
http://www.impactchicago.org
(IMPACT)

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Ohio
Columbus, OH
(614) 221-2811
http://www.impactsafety.org
(IMPACT?)

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Pennsylvania (Western)/Upstate NY
Erie, PA
(814) 833-0185
http://www.streetsmart.50megs.com/
(Affiliation unknown)

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NY/NJ/PA/CT
New York, NY
(800) 442-7273 or (212) 255-0505
http://www.prepareinc.com
(IMPACT)

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Massachusetts (Western)
Amherst, MA
doctorruthless at earthlink dot net (no phone number; fax on web site)
http://www.dr-ruthless.com/
(No affiliation?)

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Massachusetts (Boston area)
Malden, MA 02148
(781) 321-3900
http://www.impactboston.com
(IMPACT)

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District of Columbia
Washington DC
(202) 328-1203
http://www.dcimpact.org
(IMPACT)

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United Kingdom

London
020 8743 7827 or 020 8740 1114
http://www.londoncentreforpersonalsafety.org/
(No affiliation yet)

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Israel

Jerusalem
011-972-2-678-1764/94;
http://www.elhalev.org
(IMPACT)

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South Africa

Johannesburg
+27 11 646 7480
http://www.impact-africa.org/
(No affiliation yet)

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Japan

Tokyo area
http://www.impactokyo.com/
(No affiliation yet)

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Kansai
Osaka, Kansai
http://www.impactkansai.com/
(No affiliation yet)

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If this Kidpower/Teenpower/Fullpower organization I just found is using the same techniques, I'll post its locations soon, too.