KRXO

"107.7 The Franchise" airs a Sports format in Oklahoma City, Oklahoma.  Stickers from KRXO's days as a Classic Rock station can be seen here.

KRMP

"1140 The Touch" KRMP (K Russell M Perry--the station's owner) is an Urban Adult Contemporary station in Oklahoma City, Oklahoma.

Real Countrys

Real Country is a Westwood One produced, satellite-fed radio format which plays "older Country hits with newer songs by traditional-sounding Country artists." 

 WDIC - Clinchco, Virginia

 WJST - Parker/Panama City, Florida

 KCDA - Post Falls, Idaho/Spokane, Washington

WWIC - Scottsboro, Alabama

Rock 95s

CFJB - Barrie, Ontario

KBMJ - Hardin, Montana

WJZQ - Kenosha, Wisconsin

WVBO

103.9 WVBO is a Classic Hits station in Appleton/Oshkosh, Wisconsin. 

KHOZ

102.9 FM KHOZ was a Country station licensed to Harrison, Arkansas.

Channel Zs

Cincinnati, Ohio's WAQZ existed at 107.1 from around 1993 until 1998.

In 2000 the WAQZ call letters migrated to 97.3 with the city-of-license changing from Milford to Lebanon, OH.

WAZO - Oak Island/Wilmington, North Carolina

WCHZ - Harlem, Georgia

WTSQ

88.1 FM WTSQ (W The Status Quo) is a freeform, independent, community radio station in Charleston, West Virginia.  The LPFM station went on the air in 2015 from the 8th floor of the historic Union Building which is also shown on their sticker.

K106s

 WKNU - Brewton, Alabama

 CIXK - Owen Sound, Ontario

 WMKR - Baltimore, Maryland

I don't know what station this "K106" t-shirt is from.  Do you?

AFN

The American Forces Network is the radio and television broadcast network which serves American military servicemembers around the world.  The central broadcasting hub is located at March Air Reserve Base in Riverside, California.  The top sticker is specific to Aviano Air Base in northern Italy.

Funs

Fun Radio plays Dance and R&B music on about 20 frequencies in the Wallonia and Brussels regions of Belgium.  They went on the air in 1989.

 "Fun 107" WFHN is a CHR station licensed to (W) FairHaveN, Massachusetts.

WROZ "Fun 101.3" is an Adult Contemporary station licensed to Lancaster, Pennsylvania.

WTSA AM & FM

Brattleboro, Vermont's AM 1450 WTSA (W Tri-State Area) currently airs a Sports format and is affiliated with ESPN Radio.  Co-owned 96.7 FM is a Hot Adult Contemporary station.

WNYX aka WYNX?

This WNYX sticker is a bit of a mystery.  I have it listed as being from Smyrna, Georgia but everything leads me to believe that the call letters were actually WYNX.  Evidence includes this QSL card, the Wikipedia entry for the current station at 1550 in Smyrna and a mid-80s copy of the Broadcasting Yearbook.  Could this actually be a mis-printed bumper sticker?!  I mean, how many other 50,000-watt, Religious stations broadcasting at 1550 AM with suspiciously similar call letters can there be?  If you have any info and can sort this out for me, leave a comment.  I'd greatly appreciate it.

K92s

 WKUL - Cullman, Alabama

 WMIK - Middlesboro, Kentucky

WWKA - Orlando, Florida

WGIR / WHEB

 WGIR is a Rock station licensed to Manchester, New Hampshire.

 Co-owned station 100.3 WHEB is a Rock outlet in Portsmouth, New Hampshire.

The Morning Buzz airs on both stations.