Block the number immediately to stop unwanted intrusions. This call pattern suggests an automated system testing active lines, often linked to robocallers or scammers probing for responses. Hang up without engaging if it rings again—never press buttons or provide info. Enable call screening on your phone or carrier settings to filter unknowns. Report to the FTC at donotcall.gov for tracking. Watch your accounts for suspicious activity afterward, and consider a reverse lookup tool for more details. Stay cautious with persistent callers like this.
Got a message saying they're busy and can't take my call, even though they were the ones who rang, huh?