WCCK

"K104" WCCK was a Top-40 station in Erie, Pennsylvania from 1977 until the early 1990s.
 

KRKS

KRKS is a Religious station in Denver, Colorado now branded as "94.7 The Word."
 

WCFL

Chicago, Illinois' AM 1000 WCFL (W Chicago Federation of Labor) went on the air in June 1926.  They were initially listener-supported with broadcasts including music, labor and public affairs programs aimed at working-class listeners.  They eventually became more commercially oriented and by 1965 ran a Top-40 format.  Larry Lujack did afternoons on WCFL from 1972 until 1976.  In 1987 they flipped to Rock with call letters WLUP and then in 1993 switched to Sports as WMVP.
 

KNEX

106.1 KNEX was a CHR station in Laredo, Texas.
 

KGU

Honolulu's KGU signed on the air in 1922, thirty-seven years before Hawaii became a state.  In 1941 the Japanese used KGU's signal as a source for direction finding and navigation on their way to attack Pearl Harbor.  The 10,000-watt, clear-channel station currently broadcasts a Sports format and is now also heard on a translator at 95.1 FM.
 

KAYZ

103.1 FM KAYZ was a Country station in El Dorado, Arkansas from the late 1970s until around 1993.
 

CFQX

CFQX went on the air in 1981 and has carried a Country format since 1986.  They are licensed to Selkirk, Manitoba near Winnipeg.
 

WAQE

1090 AM and 97.7 FM WAQE both went on the air around the late 1970s or early 80s.  This long, 15" sticker probably dates to when they first began broadcasting.  The AM half is currently a Sports station licensed to Rice Lake, Wisconsin while the FM is Adult Contemporary "Star 97.7" licensed to Barron, WI.
 

WYKR

AM 1100 WYKR was on the air from 1976 until some time in the late 1990s and licensed to Wells River, Vermont.  They most likely carried a Country format when this keychain was made.
 

KYLZ

"Wild 106" KYLZ was a Rhythmic Contemporary station in Albuquerque, New Mexico from 1997 until 2005.
 

KHCA

"Angel 95" KHCA airs a mix of Christian Talk/Teaching with Contemporary Christian music.  They've been on the air in Manhattan, Kansas since 1990.

5SSA

5SSA "107.1 SAFM" is a Hot Adult Contemporary station in Adelaide, South Australia.  They went on the air in September 1980 at their original frequency of 107.5 FM.
 

Radio Ostbayern

I had a hard time finding much info on this either defunct or renamed station.  The old-style "BR" logo lets me know it was part of Bayerischer Rundfunk, the public service radio and TV broadcaster based in Munich, Germany.  If you have any further info on what became of Radio Ostbayern, leave a comment.
 

KKSN

A magnet from KKSN in Portland, Oregon, an Oldies station from 1988 until 2005.  The "KISN" branding was a tribute to a Top-40 station in Portland that broadcast at 910 AM and used those call letters from 1959 to 1976.  The video below is news coverage of the re-launched KISN/KKSN in 1988.  At that time they also broadcast on 910 AM, the original frequency of the first KISN.  Currently, there is a low-power Oldies outlet with the KISN calls airing at 95.1 FM which uses the logo of the original station. 
 

CFUN

1410 AM CFUN was on the air in Vancouver, British Columbia from 1955 until 2009 (except for a 4 year period from '69 to '73 when their call letters switched to CKVN.)  The main formats over the years included Top-40, Easy Listening, Adult Contemporary, Talk and Sports.  

I'm not sure why the CFUN Pac-Man sticker exists or why it looks like he's eating a Pop Tart instead of a round dot.  On a related note, a former co-worker of mine is one of the best--if not the best--Pac-Man players in the world.  As of this posting, David Race has completed 10 perfect Pac-Man games.  A perfect Pac-Man is eating every dot, every fruit and every ghost without dying even once for all 256 levels.  It's an insane accomplishment.
 

KNDS

96.3 FM KNDS is a student-run station at North Dakota State University in Fargo, ND.  "ThunderRadio" began as an online station in the late 1990s before beginning FM broadcasts in 2004.  They transmit with 100-watts, the maximum allowed for LPFM stations in the United States.
 

WUFL

1030 AM WUFL is a Religious station licensed to Sterling Heights, Michigan near Detroit.  They are part of the Family Life Radio network of around 40 stations in 11 states.
 

WPLK

800 AM WPLK airs a Soft Oldies format in (W) PaLatKa, Florida.  The sticker is signed by Radio Red, who, as of the date of this posting, is still doing mornings on the 1,000-watt (daytime) station.
 

WMBE

AM 1530 WMBE was an all-Sports station licensed to Chilton, Wisconsin circa the late 2000s.
 

WHRU

101.5 WHRU is a 32-watt, low-power FM station licensed to Huntley, Illinois.  After two years as an online-only station, the all-volunteer "Huntley Community Radio" went on the air in 2014.