---
title: "How to block unknown numbers on iPhone"
description: "Why you can't block unknown numbers on iPhone and what to do instead"
url: https://spamblocker-support.hiya.com/en/articles/15-how-to-block-unknown-numbers-on-iphone
collection: "Features"
updated: 2026-11-09
language: en
---

# How to block unknown numbers on iPhone

Why you can't block unknown numbers on iPhone and what to do instead

## Apple doesn't allow blocking unknown numbers

The iPhone operating system doesn't currently allow any app to block calls from unidentified or unknown numbers. This is an Apple limitation, not a Hiya Spam Blocker limitation.

## What you can do instead

-   **Enable Silence Unknown Callers** — go to iPhone Settings → Phone → Silence Unknown Callers. Calls from unknown numbers will be silenced and sent to voicemail.
    
-   **Use Call Screener** (Premium) — unknown callers are prompted to state their name and reason for calling before your phone rings.
    
-   **Block specific prefixes** — use "Numbers that begin with" in the Block List to block common spam area codes.
    

June 4, 2026 - v9.x, 10.x