Who called from 5106999231

I have been receiving calls from 5106999231 and someone with whom I can barely understand (unidentifiable accent) asks me how much I owe on my credit cards,  How do I unsubscribe from any future calls?

Just got a call from this number, listened to the first 4 or 5 words and hung up.

These are criminals calling you to get your credit card info so they can steal your money. Criminals don't care if they're breaking the Do-Not-Call List law, and the federal government doesn't care about this kind of thing anyway. This particular scam has been around for almost a year. It wouldn't be hard to trap them, if the feds really wanted to.

You made a long distance to an unidentified number?
NEVER return their calls. It will only make things worse.

You'd be a lot safer and less subject to snooping if you "startpage.com"d or "duckduckgo.com"d that. Google is spyware. I block it in my firewall.