Persistent calls without voicemails signal potential nuisance activity, likely from automated systems testing active lines. Block the number immediately on your phone to stop further harassment. Enable voicemail screening if available, and report to your carrier or authorities like the Do Not Call registry for investigation. Avoid answering unknown numbers to prevent engaging with possible scams. If calls persist, consider changing your number as a last resort. Stay vigilant with caller ID apps for added protection.
Got several calls from this number over the past week, yet never left a voicemail, you know.