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What to do if unknown numbers keep calling

8-minute read · Updated 2026-05-30

You're getting calls from numbers you don't recognize. Some are real, most aren't, and they won't stop. Here's a practical decision tree for handling them — without missing the calls that actually matter.

First, understand why blocking individual numbers doesn't work

Modern robocallers use caller-ID spoofing — they pick a fake number for each call, often one that looks local (your area code, sometimes your exact prefix). They cycle through thousands of fake numbers per day per campaign. Blocking one number stops exactly one call before they spoof a new one.

This is the core problem: the call data your phone shows you isn't reliable, and the bad actors have effectively unlimited supply of fake numbers.

The decision tree

Is the number in your contacts?

Answer if you want. Spoofing of friends-and-family numbers is rare for consumer scams (it happens in targeted fraud but not in mass robocalls).

Is it a local number you don't recognize?

Probably spoofed. “Neighbor spoofing” — picking a number that matches your area code and prefix — is the most common robocaller tactic. Let it go to voicemail. If it's real, they'll leave one. Robocallers rarely do.

Is it a toll-free number (800, 833, 844, 855, 866, 877, 888)?

Be skeptical. Toll-free is heavily used by both legitimate businesses and scam operations. If it's your bank or a service you use, they probably contact you via app or email too — check there first. Look the number up here before calling back.

Is the caller asking for personal info, payment, or urgent action?

Hang up. Real institutions never demand immediate payment over the phone, never accept gift cards, and never threaten arrest. See our scam-call examples guide for the specific scripts.

Is the caller someone you legitimately need to hear from (new doctor, contractor, recruiter)?

This is the hard case. You can't pre-add them to contacts. They'll likely call from a number you don't recognize. The two real options are: (a) check voicemail religiously, or (b) use a call-screening tool that engages every unknown caller and routes through the ones who give a legitimate reason.

What if they keep calling and never leave a message?

That's almost certainly a robocaller. Three things to do:

  1. 1. Don't pick up. Don't press any keys if you do. Both confirm your number is live and put you on more lists.
  2. 2. Report the number to donotcall.gov and here. Reports feed downstream filters.
  3. 3. Add an active screening layer (see below). Blocking and labeling only do so much when the caller-ID is faked.

The honest answer about “making it stop”

You can't make unwanted calls not happen — that would require the FCC and telecom carriers to solve a problem they've been working on for years and still haven't cracked. What you can do is make them not reach you. That's what screening does: the calls still happen, but someone (or something) else handles them, and you only hear about the ones that matter.