KDTR

KDTR "Trail 103.3" is an Adult Album Alternative station in Missoula, Montana.
The sticker's trapezoidal shape, colors and script are based on signs used by the Department of Agriculture to indicate entrances at US National Forests.

Radio Fiesole 100

Radio Fiesole 100 began broadcasting from Florence, Italy in 1976.  For a time, starting in the early 1990s, they only played music from Italian artists.

4CRB

4CRB 89.3 FM is a non-profit, community station airing an Easy Listening format.  They are based in Burleigh Heads, Queensland, Australia and went on the air in 1984.

WWKY

790 AM WWKY was a Talk station in Louisville, Kentucky from 1991 until 2001.

WPGU

WPGU began in 1957 as a carrier current station heard on 640 AM.  They "broadcast" to the dorms at the University of Illinois in Champaign-Urbana.  FM transmissions began in 1967 while the carrier AM signal became WDBS.  The WPGU call letters stand for (W) Parade Ground Units which was a 21-building complex built after WWII to house students and families.  The 3000-watt station carries an Alternative/Indie Rock format.  The 1990 commercial below indicates that they were a mainstream Rock station at the time.

WLZL

"El Zol 99.1 FM" was a Spanish Tropical station in the Baltimore, Maryland/Washington, DC metro area from 2005 to 2011.  WLZL was licensed to Annapolis, MD.  The call letters, format and branding currently exist in the same market at 107.9 FM.

WHTQ

WHTQ was a short-lived Album Oriented Rock station in Orlando, Florida branded as "Q96" (stickers from that period can be seen here.)  They then transitioned from AOR to Classic Rock for the next 23 years (1988-2011.) 

Hots

"Hot 93.7" WZMX - Hartford, Connecticut

"Hot 100.5" CFJL - Winnipeg, Manitoba

"Hot 96.7" KDOG - North Mankato, Minnesota

"Hot 103.5" KHHM - Sacramento, California

WDJR

A 1997 sticker from Country station WDJR in Dothan, Alabama.  They are currently branded as "96.9 The Legend" with a Classic Country format.

WAMY

1580 AM WAMY is a News/Talk station licensed to (W) AMorY, Mississippi.  Clearly, they had a Country format when this 1970s(?)-era sticker came out.

KSDW

88.9 FM KSDW is a Religious station licensed to Temecula, California near San Diego.

KPAS

A 1985 sticker from Contemporary Christian "Love 103" KPAS in El Paso, Texas. 

KGRE

102.1 FM and 1450 AM KGRE are simulcast Regional Mexican stations licensed to Estes Park and Greeley, Colorado.

KAVE

KAVE "95.3 The Kave" was an Adult Album Alternative station in Eugene, Oregon circa the early 1990s.  After they went off the air, KAVE's compact disc library was donated to local high school station KRVM which carried on the Progressive music format for a time.

CFNJ

99.1 FM CFNJ is licensed to Saint-Gabriel-de-Brandon, Quebec.

CITI

92.1 FM CITI is a Classic Rock station in Winnipeg, Manitoba.

KMBI

107.9 FM KMBI (K Moody Bible Institute) is a Religious station in Spokane, Washington.  They are the flagship station of the Moody Radio Northwest network which is heard in parts of Washington, Oregon, Idaho, Montana and Wyoming.

KVLC

"101 Gold" KVLC is a Classic Hits station in Hatch/Las Cruces, New Mexico.

WTWX

A t-shirt from 95.9 FM WTWX in Huntsville, Alabama.  The Classic Country-formatted station went on the air in August 1969.

CJFM

95.9 FM CJFM is a CHR station in Montreal, Quebec currently branded as "Virgin Radio."  I'm not sure what time period the rainbow logo shown on this key chain was used but it was definitely around in 1980 based on the mic flag in this newspaper article.