Alex went through his entire contact list and any phone numbers he remembered, which meant he probably called a bunch of people in New Jersey too but it didn't matter, they were all getting the same voicemail. 

"Hey this is Alex and this radio station in New Orleans has our EP so you should totally call and request songs by the Killjoys so we get air time! So fucking excited guys, thanks! I love you!" 

Theo, Frank, and the other guys were all doing the same, just scrolling and calling or texting. They were all completely stoked about it - who wouldn't be?