WMFN AM 640 Zeeland/Grand Rapids


Format: Ethnic; Spanish language

Contact this station through their web site, linked below:

Web site: www.birach.com

Technical Information:

HD Radio Status: no

Class: B
Daytime Power / # of Towers: 1,200 watts / 1, omnidirectional
Nighttime Power / # of Towers: 230 watts / 1, omnidirectional

Social Media:

External Links:

Call Sign History:

  • WMFN: 10/2/1995
  • WISZ: 9/8/1993
  • WROR: 3/11/1991
  • WBMX: assigned 10/12/1988

Call Sign Origin:

  • West Michigan's Fan (previous sports format)

On Air Date: 1990

Owner: Birach Broadcasting

Office Telephone: (616) 451-0551


  • 4/2015: Construction permit granted to move station to Peotone, Illinois (south of Chicago).
  • 11/7/2008: Format change to Regional Mexican / Spanish language.
  • 12/2005: Station is noted broadcasting in AM stereo, but it is later dropped.
  • 5/2005: Format change from News/Talk/Sports/Comedy as 'Hot Talk 640' to Adult Urban Contemporary as 'Smooth Vibes AM 640'. Broadcasts of Detroit Tigers baseball are dropped.
  • 1/2004: Application filed to increase daytime power from 1,200 watts omnidirectional to 2,500 watts directional using a 2-tower array; application was dismissed Nov 2004
  • 11/2001: FCC approves sale to Birach Broadcasting
  • 9/2001: Announced that the station, along with sister station WMJH-AM Grand Rapids, is being sold from Cook Media to Birach Broadcasting for $1.9 million
  • 2000: Business News format is broadened to include mainstream and sports talk
  • 9/1/1999: Format switch from Sports to Business News as 'West Michigan's Financial News'
  • 1995: Format is sports as WMFN, 'West Michigan's Fan'.
  • 1993: Format is children's targeted 'Radio AAHS' with new calls WISZ.
  • 1990: On air as WMBX with Middle-of-the-Road format.

Center of antenna array/transmitter location:

Ottawa County

Old logo gallery:







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