"They're not answering the phone." Here's a calm plan.

Pick the situationEach guide walks the same calm sequence — the first 30 minutes, the first 24 hours, and exactly when to escalate to a welfare check or 911 — tailored to the specific relationship, because the right advice for a dementia parent is not the right advice for a teenager.
General guidance, not medical or emergency advice. If you believe someone is in immediate danger, call 911 (US) now.

Choose the guide that fits

If you are about to call the police

Several of these guides end at the same decision. If you have reached it, how to request a welfare check on an elderly parent covers who can ask, the number to call, exactly what to say, what happens when officers arrive, and what it costs.

Stop having to look this up

Every guide here ends at the same place: the reason an unanswered call is frightening is that silence could mean nothing or everything, and there is no fast way to tell. A once-a-day check-in closes that gap. Depending on who you are worried about, start with the check-in app for elderly parents, the daily check-in app for seniors aging in place, or the peace-of-mind app for elderly parents if you are the one doing the worrying from a distance.