Started receiving calls from different phone numbers from different cities in Texas, they never leave a message. These are some of the other numbers and cities, Italy, TX 1-469-561-0203, 1-956-271-0645, 1-915-613-1784, 1-903-461-7175, 1-800-772-1213, 1-972-646-9042, 1-281-968-4932, 1-972-506-9430, 1-972-478-0534.
Yes, me too. Many guys calling not leaving any message. This guys are dedicated to test and gather numbers. All numbers which respond the call will be annotated and sell to the telemarketers, "scam-ers" and collect agencies. Always left that your answer machine pick up the call, never answer in person. And better if you can find telephone sets with the blocking option like Panasonic and Motorola. Unfortunately, there is not much to do if one is receiving this calls in the cellular phone.