Calls frequently never leaves a message annoying!

Unknown caller. Did not leave message. Caller i.d. reads "Med Clinic". If you fail to leave a message, you are immediately added to my call blocking "reject call" list.  Next time you call your call will not even ring my phone. It will be rejected instantly

Call with no message.

Caller didn't leave a message on my machine and the caller id said "MED CLINIC" which usually means telemarketer/scammer since every legitimate caller I know leaves a message. 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 a general location of Lake Hughes, California with 3 service providers of PG Telecom of California Inc., Integrated Communications Consultants Inc.-CA and LEVEL 3 Communications LLC-CA  which is a favorite for scammers. This is definitely a scammer that is either spoofing numbers and/or using a VoIP System to phish for personal information while running some scam. 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.
NOTE: Here is the contact information for this numbers service providers.
PG TELECOM HOLDING, INC, A CORPORATION
30251 GOLDEN LANTERN E LAGUNA NIGUEL, CA 92677
(213) 232-3450

Level 3 Communications
14452 Franklin Ave ·
Tustin, CA 92780
(657) 667-6073

Level 3 Communications
2461 W La Palma Ave ·
Anaheim, CA 92801
(714) 821-0434

Integrated Communications Consultants
120 Fleet St  Marina Del Rey, CA 90292
(310) 827-2920

No message left. CID shows Lake Hughes, CA. Blocked.