Persistent calls without voicemails often signal unwanted outreach. When numbers like this repeatedly dial in without leaving messages, it's wise to treat them cautiously, as they might be probing for active lines. Block the number on your phone to stop the harassment, and avoid answering unknown calls—let them go to voicemail to screen legitimacy. If it's a cold caller, they're likely selling something; report to authorities if it escalates. Enable call screening features on your device for added protection against such nuisances.
Calls continue to come in without any voicemail, leading me to suspect a cold‑calling operation.