Caller didn't leave a message on my machine and the caller id said "Wireless Caller" which usually means telemarketer/scammer. So I ran 3 reverse traces using 3 different types of traces and all were blocked for a person or business name and the only information was 2 general locations of Los Angeles and Huntington Park, California with 2 service providers of Verizon Wireless-CA and XO Communications Inc.-CA which is favored by scammers and both are associated with this number. This is definitely a scammer that is either spoofing or using a voip system to phish for personal information while running some scam (i.e. Energy Savings, Green Solutions etc). A legitimate business would never hide their identity and location from the public by blocking a trace. DON'T ANSWER AND DO NOT CALL BACK FOR ANY REASON. Block and report to the proper authorities. Phone companies should be held responsible for these types of calls since they are making money from them by providing the systems and services that these scammers use and possibly farming out numbers too.