How Phone.com Reduced Fraud and Protected VoIP Users with IPQualityScore

How Phone.com Reduced Fraud and Protected VoIP Users with IPQualityScore

Customer Overview

Phone.com provides cloud-based business communication solutions designed to bring enterprise-grade VoIP capabilities to small and medium-sized businesses. With more than 30,000 businesses using the platform and users spanning every continent, Phone.com processes hundreds of thousands of calls each day while supporting thousands of new phone number requests every month.

As the platform continued to scale, protecting customer trust became increasingly important.

The Challenge

Communication platforms are a frequent target for fraud because they provide valuable infrastructure that attackers can exploit.

Phone.com needed a way to identify and stop:

• Duplicate or fake account creation
• Fraudulent signups
• Abuse of promotional offers
• Spam activity
• Stolen payment methods
• Anonymous users masking their identities
• High-risk traffic from proxy networks

Without a fraud prevention layer, malicious users could potentially create large volumes of fake accounts, abuse resources, and impact the experience of legitimate customers.

For a communications platform where reliability and trust are critical, reactive moderation alone was not enough.

Why Fraud Becomes More Difficult at Scale

As usage grows, fraud attempts often become more sophisticated.

Attackers frequently use:

• Residential proxy networks
• VPNs
• Bot traffic
• Rotating IP infrastructure
• Device spoofing

Rather than appearing as a single attacker, these techniques allow malicious actors to spread activity across thousands of changing identities and IP addresses.

Traditional filtering methods can miss these patterns.

Phone.com needed a way to identify risky users before abuse occurred.

The Solution: Implementing IPQualityScore

Phone.com implemented the IPQualityScore Proxy Detection API to identify high-risk traffic in real time.

The API analyzes multiple forensic signals for every lookup, including:

• Proxy usage
• VPN activity
• Botnet indicators
• Anonymous traffic
• Device behavior patterns
• Risk scoring signals

Instead of relying on a single indicator, Phone.com could evaluate dozens of risk factors simultaneously to make smarter decisions about incoming users and transactions.

Results Since Implementation

Phone.com successfully reduced large volumes of abusive activity after deploying IPQS. These were the results after the first quarter:

10,000+ Proxies Blocked Daily

High-risk anonymous connections and proxy traffic were identified and prevented before abuse could occur.

402,432 Abusive Users and Blacklisted IPs Stopped

Suspicious users and known malicious infrastructure were detected and prevented from impacting the platform.

104,245+ Duplicate or Fake Accounts Prevented

Stopping account creation abuse helped maintain platform quality and reduce operational overhead.

1,305+ Fraudulent Transactions Flagged or Prevented

Potential payment abuse and fraudulent activity could be identified before creating downstream issues.

These results enabled Phone.com to reduce risk while improving confidence across its communication ecosystem.

Inside the Technology: Proxy Detection API

IPQualityScore's Proxy Detection API evaluates connections in real time and returns detailed threat intelligence for each lookup.

Signals analyzed include:

• Proxy and VPN detection
• Bot activity indicators
• IP reputation
• Network behavior
• Device consistency patterns
• Threat intelligence data

This allows businesses to quickly distinguish legitimate users from potentially abusive activity.

Business Impact

The impact extended beyond blocking fraud.

Phone.com gained the ability to:

• Improve trust among customers
• Reduce manual review workloads
• Minimize account abuse
• Protect platform resources
• Scale with stronger risk controls

For rapidly growing platforms, preventing abuse early can significantly reduce downstream operational costs.

Key Takeaways

As communication platforms grow, fraud prevention becomes increasingly important. Sophisticated attackers often rely on anonymity tools and changing infrastructure to avoid detection.

By integrating IPQualityScore, Phone.com implemented a proactive approach that helped identify high-risk activity before it affected customers.

The result was a safer and more scalable communication platform built around user trust.