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.

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.

Configuring Retry Logic

When HLR validation is enabled, you can set up intelligent retry logic to handle temporarily unreachable numbers:

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

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

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.

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.

HLR Analytics Dashboard

Monitor your HLR validation performance with comprehensive analytics:

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

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

Best Practices for HLR Validation

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.

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.

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.