i do the same thing when i get calls from unknown numbers... this past week i have received 3-4 phone calls from weird 4-digit numbers... like 1003, 2019, 3008, etc... of course, i did not answer, but i do wonder about the strange 4 digits...
Caller ID spoofing is the practice of causing the telephone network to display a number on the recipient’s Caller ID display that is not that of the actual originating station. The term is commonly used to describe situations in which the motivation is considered malicious by the speaker or writer. Just as e-mail spoofing can make it appear that a message came from any e-mail address the sender chooses, Caller ID spoofing can make a call appear to have come from any phone number the caller wishes. Because of the high trust people tend to have in the Caller ID system, spoofing can call the system’s value into question. Many people have claimed that, after answering a spoofed call, the charge for the call is larger than it would be for a legitimate call.
http://en.wikipedia.org/wiki/Caller_ID_spoofing
If they don’t care enough to leave a message, I don’t care enough to call them back. As and aside, I’ve been getting a few emails from “se” with a note that says to “open attachement to see if I’m interested”. LOL! Yup. I’m gonna break my fingers rushing to open the attachment. NOT!
Debt collectors do this. I still go through cycles where I will get dozens of calls per day from debt collectors looking for people I have never heard of. I have to record the calls and then hopfully get them to violate the law then send it to the state’s attorney general and they stop, for a while.
The cellphone companies get a % of the money. I know that Verizon was getting 40% of text message charges. I had to block all texting to stop it.