Numbuster.com (Domain) Investigation Report
Generated on Apr 22, 2026
Why we think so?
NumBuster.com operates a mobile application and services system that provides a global trust rating for phone numbers, including a caller ID system populated anonymously by users. The site uses reliable Amazon-hosted infrastructure, supports multiple languages including Russian and English, and ranks around #521,524 globally with about 37,400 monthly visits. Traffic mainly comes from direct visits and searches, with primary audience countries including Germany, Brazil, Russia, Ukraine, and Indonesia. Contact details show official support emails and active social media in Facebook, Instagram, and YouTube. The domain was registered in 2012, uses a valid SSL certificate, and has no blacklists or phishing detections. User reviews on app stores average 4.3 to 4.8 stars, praising its spam detection and caller ID features but noting recurring billing issues, privacy concerns, and technical bugs. No lawsuits or disputes related to the domain were found in public records.
Risk Insights
Mixed User Reviews
- Complaints about billing and subscription practices.
- Privacy concerns reported around data exposure.
- Technical glitches impact usability.
Professional Hosting and SSL
- Uses AWS infrastructure and Amazon registrar.
- Valid SSL certificate active through May 2026.
- Technical setup aligns with legit services.
No Scam or Blacklist Detections
- Not listed on Google Safe Browsing or crypto scam databases.
- No phishing or malware flags detected.
- Supports safe browsing environment for users.
Category Scores
Red Flags & Warnings
- Multiple user complaints about unauthorized billing and poor customer support increase suspicion.
- Reports of privacy concerns due to data exposure and unauthorized account creation.
- Some app functionality problems including crashes, lack of updates, and forced web usage degrade user experience.
Detailed Checks & Insights
0-100 Scale
Domain Technical Setup
Score: 88
Domain Technical Setup
"The site runs on AWS infrastructure, employs HTTPS with a valid SSL cert issued in February 2026, and deploys common web technologies tied to trustworthy providers."
Reason: Domain uses professional cloud hosting (Amazon Web Services) and has a valid SSL certificate ensuring encrypted connections.
Traffic and User Engagement
Score: 75
Traffic and User Engagement
"Traffic originates mostly direct and from search engines, with an average bounce rate of 24%, showing engaged visitors."
Reason: Monthly visits of over 37,000 with moderate bounce rate and substantial page views indicate a genuine user base.
Ownership and Registration
Score: 80
Ownership and Registration
"Registrar is Amazon Registrar, Inc., WHOIS contact protected through Identity Protection Service in the UK; domain secured against common registrant abuse flags."
Reason: Domain was registered in 2012 and shows WHOIS protection services, with no suspicious registrant anomalies.
Blacklist and Scam Detection
Score: 85
Blacklist and Scam Detection
"No risk detected by Google Safe Browsing; domain absent from crypto scam databases improves trust."
Reason: No listings on common scam or phishing blacklists including Google Safe Browsing and Crypto Scam Sniffer.
Brand and Trademark Risks
Score: 95
Brand and Trademark Risks
"USPTO database reveals no trademark registrations or conflicts on 'numbuster'."
Reason: Trademark search shows no conflicts which reduces risk of brand impersonation or fake identity issues.
User Reviews and Reputation
Score: 50
User Reviews and Reputation
"Many users report unauthorized charges, subscription issues, and privacy concerns though the app maintains relatively high ratings overall."
Reason: User feedback is mixed, with praise for core spam ID features but significant complaints about billing, privacy, and app bugs.
Your Next Steps
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1
Review latest app user feedback on the Apple App Store and Google Play for updated experience reports.
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2
Contact NumBuster's official support at support@numbuster.com for questions regarding billing or privacy.
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3
Monitor for any new scam or phishing reports linked to numbuster.com in trusted alert services.
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4
Verify SSL certificate validity and domain registration status periodically to ensure ongoing legitimacy.
Key Evidence & Citations
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NumBuster app user reviews and complaints
⤷ Comprehensive user feedback highlighting pros and cons of NumBuster app.
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NumBuster.com technical and traffic data from SimilarTech
⤷ Details domain tech stack, traffic, and languages served.
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WHOIS and SSL certificate details for numbuster.com
⤷ Domain age, registrar, and SSL validity info.
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Crypto Scam Sniffer blacklist check
⤷ Confirms numbuster.com is not blacklisted as scam.
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USPTO trademark search results for 'numbuster'
⤷ No trademark conflicts found for 'numbuster'.
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