Why choose HLR Lookup API over traditional phone validation methods?

Unlike basic validation services, our HLR lookup API connects directly to carrier networks, providing: 99.9% accurate carrier validation through direct network queries, real-time phone validation API without outdated databases, significant cost savings by preventing failed message delivery, instant network-level verification for business numbers, and enterprise-grade reliability with carrier-direct connections. This translates to immediate ROI through reduced communication costs and improved delivery rates.

How does our Phone Lookup API reduce business communication costs?

Our comprehensive phone lookup service delivers measurable cost benefits: eliminate messaging costs to invalid business numbers, reduce carrier fees through smart routing optimization, prevent revenue loss from fraudulent activities, optimize communication pathways using carrier data, and improve delivery rates with pre-validated numbers. Clients typically see 30-40% reduction in communication infrastructure costs.

What makes our Spam Number Lookup superior for enterprise fraud prevention?

Our enterprise-grade spam detection system provides unmatched protection: real-time spam status verification across carrier networks, business-focused fraud pattern detection, community-driven spam reporting system, automated risk scoring for all numbers, and integration with major telecom security systems. Enterprise clients report up to 95% reduction in fraudulent communication attempts.

How does Reverse Phone Lookup API enhance business verification?

Our phone lookup capabilities improve business trustworthiness: instant business name verification through carrier data, telecom fraud prevention, phone number spoofing detection, cross-reference with business registries, and real-time business status monitoring. This enables secure, verified B2B communications at scale.

How does our KYC API speeds up onboarding?

Our KYC API accelerates client verification while maintaining compliance: automated client identity verification, instant carrier-level client validation, multiple data points for verification, reduced onboarding time by up to 80%, and full audit trail for compliance. This typically reduces onboarding costs while improving security.

What ROI can businesses expect from our Carrier Lookup API?

Our carrier lookup API delivers measurable business impact: 50% reduction in failed message costs, 30% improvement in delivery rates, reduced telecom fraud losses, and enhanced business communication reliability. Most enterprises see positive ROI within the first month of implementation.

How does Branded Caller ID improve connection rates?

Our branded caller ID solution significantly impacts business metrics: up to 3x increase in call answer rates, verified business identity display, enhanced customer trust through verification, reduced spam flagging of legitimate calls, and improved customer engagement metrics. Clients report 60-80% improvement in first-call connection rates.

Can I resell CallerAPI services?

Yes! With our industry-lowest rate of $0.0039 per lookup (compared to competitors charging $0.009 or more), you can simply purchase our API and resell it at whatever price point you choose. The significant price difference lets you set competitive rates while maintaining healthy margins.

Telecom fraud prevention and network spam protection

Protect your network and subscribers with real-time fraud detection powered by carrier-grade data

Get Started See Benefits

96%

US & Canada coverage

15K+

New spam numbers daily

500ms

Average response time

Stop revenue leakage from fraud

See how carriers use CallerAPI to protect their network and increase ARPU

Your Network Today

$2.5M+ Annual Loss

Average revenue loss from fraudulent calls and network abuse

25% Customer Churn

Subscribers switching carriers due to spam calls

Regulatory Risk

Non-compliance with FCC STIR/SHAKEN mandates

With CallerAPI Protection

85% Fraud Reduction

Immediate impact on revenue protection and network efficiency

40% Higher NPS

Improved customer satisfaction and retention

New Revenue Stream

Premium caller ID services for subscribers

Real-time fraud detection

See the rich data you get for every number lookup

High Risk Number

+1 (888) 221-1161

Spam Score 100

Total Complaints 43

Government Impersonation 38%

Robocalls 24%

Medical & Prescriptions 16%

Friends Impersonation 12%

Other 10%

{
  "data": {
    "phone": "+18882211161",
    "is_spam": true,
    "spam_score": 100,
    "reputation": "SPAM",
    "total_complaints": 43,
    "complaints": [
      {
        "CreatedDate": "2025-03-22T16:01:58Z",
        "ConsumerState": "Missouri",
        "Subject": "Calls pretending to be government"
      },
      // ... more complaints ...
    ]
  }
}

What our customers say

"Glad to be working with the CallerAPI team! Excited to be making this a reality on a global scale!"

Gideon Ebose

Co-Founder, Rulebase (YC F24)

"Choosing CallerAPI was a big upgrade to our phone fraud prevention system. We've seen a 40% increase in accuracy"

Victor Saldarriaga

CTO, Vertical Technologies

Best price on the market

Basic

$25/mo

5,000 API calls/month
99% uptime
Pre-built code
No-code integrations

Get started

Premium

$99/mo

20,000 API calls/month
Everything in Basic
Priority support
Access to Beta testing

Get started

Enterprise

$997/pay-per-use

250,000+ API calls
Everything in Premium
Scalable pricing
KYC API

Talk to Founder

Caller ID API questions

Ready to protect your network?

Get started with 100 free lookups. No credit card required.

Protect My Network