I got a call from this number and they hung up on me. dont know who it was. no answer when i tried to call back. Do you know?

Two days running now this person (male) calls, asks for my husband, I say he isn't available and ask for a message.  He says no and hangs up before I can ask who is calling.  When you call back you get an un-named voicemail.

Received a call from a local number, when answered the person just hangs up. Called back and got a voicemail stating an 830 area code (not in area). Only voicemail, no one ever answers.

got a call, he hung up on me when i said who i was.

It is a call from 1-830-865-3302 that is forwarded to local phones, usually cell phones throughout the USA.

It is originated from a City Jail and it is inmates calling on a scam on behalf of officer's association or any other telemarketing scam.
DO NOT GIVE YOUR INFO!
DO NOT CALL ANY NUMBER THEY GIVE TO YOU!
They will tell you to call *72 or some related asterisk and digit and then some telephone number for a credit of an erroneous charge.
What that does is make your phone forwarded to another phone so that other phone can make outgoing calls and you pay the bill.
Do what I did.
I wrote down the time and day of the call and filed a complaint with County Jail administrator, since they have audio records and can add more jail time for this scam. Alternately, tell them to f*** off and hang up
Call