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.

WBVM

"Spirit FM 90.5" WBVM (W Blessed Virgin Mary) is a 100,000-watt Religious station in Tampa, Florida.

Mix 96s

 KYMX - Sacramento, California

 WMSX - Buffalo, New York

 KCVM - Hudson/Waterloo/Cedar Falls, Iowa

KXXM - San Antonio, Texas

KRDG

1230 AM KRDG was a Top-40 station in (K) ReDdinG, California.  They were on the air from 1956 until 1982.

KLBU

"Jam'n 94.7" KLBU is a Rhythmic Hot AC station in Santa Fe, New Mexico.

KENN

1390 AM KENN is a News/Talk station in Farmington, New Mexico.

KBUX/The Underground

"The Underground" was a student-run, internet radio station broadcasting from The Ohio State University from the late 1990s until around 2008.  An earlier incarnation of the station was known as "KBUX" and they broadcast on a cable TV channel as well as at 91.1 FM.