Among the radio stations that are playing or have played Mark's music are:
New England
WUMB Boston MA
WBOS Boston MA
WERS Boston MA
WMBR Cambridge MA
WRBB Boston MA
WMFO Medford MA
WBRS Waltham MA
WICN Worcester MA
WCUW Worcester MA
WFCR Amherst MA
WMVY Martha's Vineyard MA
WOMR Provincetown MA
WFMR Orleans MA
WATD Marshfield, MA
WMCB Greenfield MA
WXOJ Northampton MA
WBSL Sheffield MA
WMNB North Adams MA
WUNH Durham NH
WSCA Portsmouth NH
WHEB Portsmouth NH
WSCS New London NH
WNEC Henniker NH
WNHN Concord NH
New Hampshire Public Radio
WXIN Providence RI
WWUH Hartford CT
WHUS Storrs CT
WESU Middletown CT
WVOF Fairfield CT
WHDD Sharon CT
WERU Blue Hill ME
WRBC Lewiston ME
WHPW Harpswell ME
WGDR Plainfield VT
WGDH Hardwick VT
Vermont Public Radio
Northeast
WFUV Bronx, NY
WAMC Albany NY
WJFF Jeffersonville NY
WBNY Buffalo NY
WSPN Saratoga Springs NY
WIOX Roxbury NY
WAER Syracuse NY
WRUR Rochester NY
WHRW Binghamton MY
WLHV Annandale-on-Hudson NY
WUSB Stony Brook, NY
WSLU Canton, NY
WKZE Sharon NY
WTBQ Warwick NY
WCVF Fredonia NY
WVKR Poughkeepsie NY
WRAQ Angelica NY
WGXC Acra NY
WFDU Bergenfield NJ
WPRB Princeton NJ
WTSR Trenton NJ
WPPM Philadelphia PA
WYEP Pittsburgh PA
WPSU State College PA
WDIY Allentown PA
WXPI Williamsport PA
WIUP Indiana PA
WTMD Towson MD
WMUC College Park MD
WVUD Newark DE
Midwest
WFMT Chicago IL
WDBX Carbondale IL
WEFT Champaign IL
WDCB Glen Ellyn IL
WFHB Bloomington IN
KHOI Ames IA
WHFR Dearborn MI
WXOU Auburn Hills MI
WNMC Traverse City MI
WXHR Hillman MI
WFHB Bloomington IN
WBGU Bowling Green OH
WOBO Cincinnati OH
WYSO Yellow Springs OH
WRUW Cleveland OH
WJCU Cleveland OH
WNPA Canton OH
Kansas Public Radio, Lawrence KS
KOPN Columbia MO
KUMD Duluth MN
WORT Madison WI
WWSP Stevens Point WI
WOJB Hayward WI
WRST Oshkosh WI
Wisconsin Public Radio
South
WLJS Jacksonville AL
WRFG Atlanta GA
WFJO Folkston GA
WTUL New Orleans LA
WXDR New Orleans LA
WRKF Baton Rouge LA
WHYR Baton Rouge LA
WLRN Miami FL
WFIT Melbourne FL
WHJX Jacksonville FL
WJSJ Jacksonville FL
WSLR Sarasota FL
WUWF Pensacola FL
WQCS Fort Pierce FL
WLSL Tampa FL
WUVT Blacksburg VA
WRIR Richmond, VA
Radio Fairfax Fairfax VA
WYAP Clay WV
WEJP Wheeling WV
WOTR Weston WV
WYAP Clay WV
WFSS Fayetteville NC
WCOM Chapel Hill NC
WSFM Asheville NC
WHUP Hillsbourough NC
WAGS Bishopville SC
KEUL Girdwood AR
KIAL Unalaska AR
KTEP El Paso TX
KEOS College Station TX
West
KZSU Palo Alto CA
KALW San Francisco CA
KPFA Berkeley CA
KFCF Fresno CA
KUBU Sacremento CA
KDVS Davis CA
KONE Bakersfield CA
KPHD Modesto CA
KVMR Nevada City CA
KRCB Santa Rosa CA
KZFR Chico CA
KGIG Modesto CA
KXCI Tucson AZ
KGLP Gallup NM
KBAC Santa Fe NM
KALH Alamogordo NM
KTAL Las Cruces NM
KGNU Boulder CO
KRCC Colorado Springs CO
KAFM Grand Junction CO
KRFC Fort Collins CO
KUSU Logan UT
KZMU Moab UT
KGLT Boseman MT
KVRZ Libby MT
KPBX Spokane WA
KSER Everett WA
KCHW Chewelah WA
KBOO Portland OR
KLCC Eugene OR
KACI The Dalles OR
KXCR Florence OR
KBOG Brandon OR
KMUZ Salem OR
Jefferson Public Radio, Ashland OR
KONR Anchorage AK
KRNN Juneau AK
Canada
CKUT Montreal
CFMU Hamilton, Ontario
CHES Erin, Ontario
CKOL Campbellford, Ontario
CKPC Brantford, Ontario
CKCU Ottowa, Ontario
UMFM Winnipeg, Manitoba
CJTR Regina, Saskatchewan
CITR West Vancouver, British Columbia
CJMP Powell River, British Columbia
Europe/Israel/Australia/New Zealand/Virgin Islands
FM 95.6 Lengerich, Germany
CountryMusic24 Radio, Berlin, Germany
Radio ISW, Waldkraiburg, Germany
Radio ZuSa Lueneburg, Germany
Radio Upper Galilee Israel
Beyond Radio, Lancaster, Lancashire UK
Sword Radio UK
2RRR FM 88.5 Sydney, Australia
31NR Melbourne Australia
Planet Radio, Brisbane Australia
2MAX FM 91.3 Narrabri Australia
Radio 2MCE-FM Bathurst Australia
2Air FM Coffs Harbour Australia
Radio Folk Phoenix FM 106.7 Victoria Australia
Radio Kidnappers, Hastings NZ
Town & Country Radio, Lower Hutt NZ
Wellington Access Radio, New Zealand
WVGN St. Thomas, Virgin Islands
Satellite/Internet Radio/Podcasts
Sirius Radio -- The Village Folk Show on The Bridge (Ch.32)
Online Folk Festival
Radio.singout.org
Acoustic Outpost
Radio Nowhere Live
Folk Music Notebook
Americana Alley
Radio Fairfax
The Folkchef's Kitchen
Radiowayne
Live365.com
Radio Crytal Blue
Webradio Golden Flash
Bostonfreeradio.com
Bluesandrootsradio.com
Positively Charged Radio
Global Community Radio
The Global Voice
Homelands Radio
Shout Ratio
Sugar Country Radio
Bumps Radio
920 WON The Apple
Dr. Demento Program (Nationally Syndicated)