An unknown number appears on your phone. Spam or important call? Here are the 10 best tools to find out in seconds.
🥇 1. Truecaller — The World Leader
Truecaller is the reference app with over 450 million users worldwide.
Strengths
- Massive collaborative database
- Real-time identification of incoming calls
- Automatic blocking of known spam
- Free reverse lookup
Weaknesses
- Data collection (your address book)
- Ads in free version
Price: Free (Premium version ~$3/month)
🥈 2. Hiya — The Carriers' Choice
Hiya is used behind the scenes by many carriers and manufacturers (Samsung). If your phone displays "Spam likely" without a third-party app, it's probably Hiya.
Strengths
- Industry reference technology
- Natively integrated on some smartphones
- Very reliable for business numbers
Price: Free
🥉 3. Tellows — The French Community
Tellows is a community site where users share their experiences with received numbers.
Strengths
- Very active in France
- Detailed user comments
- No registration required to view
- Clear trust score
Price: Free (premium app available)
4. Orange Anti-spam — For Orange Customers
If you're an Orange customer, the "Orange et moi" app includes a very effective free anti-spam.
See our carrier anti-spam comparison.
5. 33700 — Official Reporting
33700 is the national number for reporting SMS and voice spam in France.
Price: Free
6. Should I Answer — Open Source and Respectful
Should I Answer is an open-source alternative focused on privacy.
Strengths
- Doesn't collect your contacts
- Community database
- Available on Android and iOS
Price: Free
7. PagesJaunes Reverse Directory
The classic PagesJaunes reverse directory allows you to find the owner of a landline or mobile number (if listed).
Price: Free
8. Bloctel — Check Your Registration
Bloctel is not a tool to check spam numbers, but to protect yourself by registering on the opposition list.
Note: Bloctel will disappear with the switch to opt-in in August 2026.
9. NumVerify / API Verifiers
For professionals and developers, services like NumVerify allow validating and identifying numbers via API.
Price: Freemium
10. HUHU — For Professionals
Our service HUHU is designed specifically for companies that prospect by phone.
What HUHU Does Differently
- Checks if your own numbers are marked spam
- Real-time reputation monitoring
- Alerts before your numbers get blacklisted
- Multi-source data (carriers + apps)
Comparison Table
| Tool | Type | Free | Best For |
|---|---|---|---|
| Truecaller | App | ✅ | General public |
| Hiya | App | ✅ | Native integration |
| Tellows | Site/App | ✅ | FR Community |
| Orange Anti-spam | Carrier app | ✅ | Orange customers |
| 33700 | Reporting | ✅ | Report spam |
| Should I Answer | App | ✅ | Privacy |
| PagesJaunes | Site | ✅ | Landlines |
| Bloctel | Official site | ✅ | Personal protection |
| NumVerify | API | ⚠️ | Developers |
| HUHU | B2B Service | ⚠️ | Businesses |
FAQ
Which tool should I choose as an individual?
Truecaller or Hiya are the most complete. If you're with Orange, the built-in anti-spam is often enough.
What if I'm a company that prospects?
You need to check the reputation of your own numbers, not others. Use a service like HUHU.
Sources: Truecaller, Hiya, Tellows
