They never leave a message when they call you. And when you call this number during business hours you get a message that does not identify the name of the business, but says "Our offices are now closed" and lists the hours of business that they are open - which is the time you are calling.
I called 210-882-1757 and asked where I was calling, the lady on the phone stated; Account Servicing a collection agency for hospital bills.
Hope this helps
I got a call from this number today. I did not answer in time, so I called them back. They identified themselves only as "Account Services" and refused to give any additional information unless I verified my SSN. I told them I wasn't about to give information over the phone without knowing who I was speaking to. He got angry and told me to answer the letters they had sent me.