Alert System with Visa Mastercard Ongoing violations of Do Not Call, and doesn't have a Web site. Other

They called again today (despite being told repeatedly not to, and that they are in violation of Do Not Call) from a number to which the call could not be returned. The number is in my local area which suggests strongly it was spoofed.

I pretended interest in their service, and they asked for the following:

(1) Last four digits of my credit card number

(2) Last four digits of my Social Security number

(3) My Zip code

(4) The bank that issued the credit card

(5) The customer service phone number of the bank

Needless to say, I did not give them the information. An onine article "Can I Give Away the Last Four Numbers of My Social Security Number?" warns that fraudsters can use computer algorithms to predict the first five digits of the Social Security number of people born after 1989. Add the last four, and they have the entire number. "Guard the last 4 digits of your Social Security number – they may be all ID thieves need" adds, “If someone asks for the last four digits, you’re basically turning over the keys ...If it’s a sophisticated criminal, that’s all they need.”

"British tabloid type "spoofing" threatens your credit card information" by Broderick Perkins warns further, "Anyone who can "spoof" your [phone] number, has those last four digits and your ZIP code, may be able to obtain the same account." In other words, if they have your phone number (because they know the number at which they called you), the last 4 digits of your credit card number, and your Zip code, they can call the bank to access your balance and other information.

While "Alert system with visa mastercard" did not ask for my entire credit card number or Social Security number, the fact that they called from a phone number to which it is not possible to place a return call, and the fact that their call is illegal in the first place according to the Do Not Call law, tells me everything I need to know about them.