How do I find AT&T's voicemail number for my region?

[CurveDave]

I'm using a Verizon Note 4 on AT&T's network. I tried to check my voicemail using the long press 1 shortcut but I get the Verizon number which obviously doesn't work for me. Anybody know where I can find the regional number for Iowa for AT&T's voicemail?
Thanks!

 

[CurveDave]

Problem solved. I just started a chat w/ AT&T tech support and they gave me my regions #.

 

[Andy847]

I just did the same with my Verizon Note 4, had the same problem. I posted about it here also. My workaround was to put in my cell number and it would get me to AT&T's Voicemail. After that just put it on Speed dial for Number 2 and now I just press #2 it dials Voicemail for me. Hope that works. I had problems with Voicemail notifications also, but they show up on the Verizon Visual Voicemail Icon for me, so just I just added that to my Homescreen.