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Overview

HLR (Home Location Register) validation helps you verify phone number reachability before making calls, significantly improving your campaign performance and reducing wasted resources on inactive numbers.
HLR validation is available for all voice campaigns and can be configured at the campaign level with customizable retry logic.

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Enabling HLR Validation

1

Access Voice Campaign Settings

Navigate to your voice campaign and click on the Voice Agent configuration step in the campaign wizard.
2

Locate HLR Validation Section

Scroll down to find the HLR Validation section below the Numbers and Agents configuration.
3

Configure HLR Settings

Click the Configure button to open the HLR validation settings modal.
HLR Validation section in voice campaign settings
4

Enable Auto HLR Validation

Toggle the Auto HLR Validation switch to enable pre-call number verification.
Once enabled, all numbers will be validated before dialing attempts.

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Configuring Retry Logic

When HLR validation is enabled, you can set up intelligent retry logic to handle temporarily unreachable numbers:
  • Basic Configuration
  • Advanced Timing

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Number of Retries

Set how many times the system should retry failed calls (1-10 retries recommended).Recommended Settings:
  • Lead Generation: 3-5 retries
  • Customer Service: 2-3 retries
  • Sales Calls: 4-6 retries

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Delay Between Retries

Configure the initial wait time before the first retry (1-60 minutes).Best Practices:
  • Peak Hours: 5-10 minute delays
  • Off-Peak Hours: 2-5 minute delays
  • Weekend Campaigns: 10-15 minute delays

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Understanding HLR Status Indicators

The HLR validation section displays the current status with color-coded badges:

Enabled

HLR validation is active for this campaign. Numbers will be verified before calling.

Disabled

HLR validation is not active. All numbers will be called without pre-verification.

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Viewing HLR History

Track your HLR validation performance by accessing the history:
1

Open HLR Settings

Click Configure in the HLR Validation section.
2

Access History

Click View HLR History button at the bottom of the settings modal.
3

Analyze Results

Review the history table showing:
  • Request ID and timestamp
  • Phone number and validation status
  • Carrier response details
  • Success/failure indicators
4

View Raw Responses

Click View Raw for any entry to see the complete HLR response data including carrier information, porting status, and technical details.

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HLR Analytics Dashboard

Monitor your HLR validation performance with comprehensive analytics:
  • Overview Metrics
  • Retry Performance
  • Carrier Insights

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Key Performance Indicators

  • Total Requests: All HLR validations performed
  • Success Rate: Percentage of numbers validated as active
  • Average Response Time: Speed of validation queries
  • Total Cost: Investment in HLR validation
  • ROI: Return on investment from improved targeting

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Cost Analysis

  • Cost per Request: Average price per HLR validation
  • Total Savings: Money saved from avoiding failed calls
  • Failed Call Prevention: Number of unsuccessful calls avoided

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Best Practices for HLR Validation

For High-Volume Campaigns:
  • Enable HLR validation for all numbers
  • Use 3-5 retries with 2-3 minute initial delays
  • Monitor costs and adjust retry limits as needed
For Targeted Campaigns:
  • Validate premium/high-value prospects
  • Use longer retry delays (5-10 minutes) for better success rates
  • Focus on quality over quantity
For Time-Sensitive Campaigns:
  • Use shorter retry windows (1-2 retries max)
  • Prioritize immediate responses over comprehensive validation
  • Monitor real-time performance metrics
Budget Control:
  • Set daily/monthly HLR validation limits
  • Monitor cost per validation in analytics
  • Balance validation costs against improved success rates
ROI Optimization:
  • Track savings from prevented failed calls
  • Calculate cost-benefit ratio regularly
  • Adjust retry logic based on performance data
Efficiency Tips:
  • Validate contact lists during off-peak hours when possible
  • Remove consistently failing numbers from campaigns
  • Use analytics to identify optimal validation strategies
Regular Review Schedule:
  • Check HLR analytics weekly for campaign optimization
  • Monitor carrier performance trends monthly
  • Adjust retry logic based on success rate patterns
Key Metrics to Track:
  • Connection rate improvements from HLR validation
  • Cost per successful connection comparison
  • Time savings from avoiding failed calls
  • Overall campaign ROI impact
Troubleshooting Indicators:
  • Sudden drops in validation success rates
  • Unexpected increases in validation costs
  • Poor retry performance patterns

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Common Issues and Solutions

High Validation Costs: If HLR costs are unexpectedly high, check your retry settings and consider reducing the number of attempts or increasing delays between retries.

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Troubleshooting Guide

Issue: Low HLR Success Rates
  • Cause: Outdated contact data or poor data sources
  • Solution: Audit data quality and update contact acquisition processes
Issue: Poor Retry Performance
  • Cause: Retry delays too short or network congestion
  • Solution: Increase retry intervals and spread attempts across time periods
Issue: Inconsistent Carrier Results
  • Cause: Carrier-specific technical issues or network problems
  • Solution: Contact support with carrier details and HLR response logs
Most HLR validation issues can be resolved by adjusting retry timing or improving contact data quality.

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Integration with Campaign Workflow

HLR validation integrates seamlessly with your existing voice campaign process:
  1. Campaign Launch: HLR validation begins automatically when campaign starts
  2. Real-Time Processing: Numbers are validated immediately before each dial attempt
  3. Automatic Retry Handling: Failed validations are queued for retry according to your settings
  4. Analytics Integration: All validation data appears in campaign performance reports
  5. Cost Tracking: HLR costs are included in overall campaign cost analysis
Enable HLR validation early in your campaign setup to ensure optimal performance from the first call.