Best Practices for Blocked Numbers: Complete Guide

Following best practices helps you manage your blocked numbers list effectively, optimize campaigns, and protect your sender reputation. This guide covers essential practices.

Regular Maintenance #

Weekly Reviews #

What to Do:

• Review recently blocked numbers
• Check for patterns or trends
• Identify numbers that can be unblocked
• Verify blocking is still necessary

Time Required: 15-30 minutes per week

Monthly Cleanup #

What to Do:

• Review entire blocked list
• Remove outdated entries
• Update product selections
• Analyze blocking patterns

Time Required: 30-60 minutes per month

Number Format Best Practices #

Always Use International Format #

Correct Format:

• ✅ +919876543210 (with country code)
• ✅ +12025551234 (USA)
• ✅ +442071234567 (UK)

Incorrect Format:

• ❌ 9876543210 (missing country code)
• ❌ +91-98765-43210 (contains dashes)
• ❌ 91 98765 43210 (contains spaces)

Why It Matters:

• Ensures accurate blocking
• Prevents format-related issues
• Maintains consistency

Validate Before Adding #

Before Adding:

1. Verify number format
2. Check for country code
3. Remove spaces and special characters
4. Test with a few numbers first

Product Selection Strategy #

Block Only What’s Necessary #

Best Practice:

• Block specific products that caused issues
• Don’t over-block unnecessarily
• Consider user preferences

Example:

• If SMS failed but WhatsApp works: Block only SMS
• If user opted out completely: Block all products

Use “All Products” Wisely #

When to Block All:

• User requested complete opt-out
• Number is completely invalid
• Compliance requirements

When Not to Block All:

• Only one product has issues
• Temporary problems
• Testing scenarios

Bulk Operations #

Test Before Bulk Adding #

Process:

1. Add 5-10 numbers first
2. Verify they’re blocked correctly
3. Check product selections
4. Then proceed with bulk adding

Why: Prevents errors in large batches

Keep Batches Manageable #

Recommendations:

• Maximum 100 numbers per batch
• Split larger lists into smaller batches
• Validate each batch before adding

Benefits:

• Easier error handling
• Faster processing
• Better validation

Search Before Adding #

Always Check First #

Before Adding:

1. Search for the number
2. Check if it’s already blocked
3. Review existing entry if found
4. Update instead of creating duplicate

Benefits:

• Avoids duplicates
• Maintains clean list
• Prevents confusion

Status Management #

Use Inactive Status Wisely #

When to Use Inactive:

• Temporary blocks
• Testing scenarios
• Uncertain situations

When to Use Active:

• Permanent blocks
• Compliance requirements
• User opt-outs

Best Practice: Default to “Active” unless you have a specific reason to use “Inactive”.

Regular Monitoring #

Track Blocking Patterns #

What to Monitor:

• Which products are blocked most
• Common number patterns
• Blocking trends over time
• Peak blocking periods

Why: Helps identify issues and improve campaigns

Analyze Results #

Regular Analysis:

• Review blocking statistics
• Identify problematic campaigns
• Find data quality issues
• Optimize contact lists

Documentation #

Keep Records #

What to Document:

• Why numbers were blocked
• When blocks were added
• Any special circumstances
• Changes made to blocks

Benefits:

• Better decision-making
• Compliance records
• Easier troubleshooting

Campaign Integration #

Check Before Campaigns #

Before Launching:

1. Review blocked list
2. Ensure important numbers aren’t blocked
3. Verify product selections
4. Check for recent additions

Benefits:

• Prevents missed deliveries
• Ensures campaign success
• Protects sender reputation

Use for List Cleaning #

Process:

1. Export blocked numbers
2. Remove from contact lists
3. Clean database
4. Improve data quality

Compliance Considerations #

Respect User Preferences #

Always:

• Block numbers when users opt out
• Respect user requests
• Maintain compliance
• Document opt-outs

Regular Compliance Review #

Monthly:

• Review compliance-related blocks
• Verify opt-out blocks are active
• Check for any violations
• Update as needed

Troubleshooting Practices #

When Blocks Don’t Work #

Check:

1. Status is “Active”
2. Correct products selected
3. Number format is correct
4. Entry was saved properly

Common Issues:

• Status set to “Inactive”
• Wrong product selected
• Number format mismatch

Regular Testing #

Test Periodically:

1. Add a test number
2. Verify it’s blocked
3. Try sending (should fail)
4. Remove test number

Benefits:

• Confirms feature works
• Identifies issues early
• Builds confidence

Optimization Tips #

Remove Outdated Entries #

Regular Cleanup:

• Remove old test entries
• Delete incorrect blocks
• Clean up duplicates
• Update as needed

Organize Your List #

Organization:

• Use consistent product selections
• Group similar blocks
• Maintain clear records
• Regular maintenance

Common Mistakes to Avoid #

Mistake 1: Over-Blocking #

Problem: Blocking all products when only one has issues

Solution: Block only necessary products

Mistake 2: Wrong Format #

Problem: Adding numbers without country code

Solution: Always use international format

Mistake 3: Not Searching First #

Problem: Creating duplicate entries

Solution: Always search before adding

Mistake 4: Forgetting Status #

Problem: Adding blocks with “Inactive” status

Solution: Default to “Active” unless needed

Mistake 5: No Regular Review #

Problem: Outdated entries accumulate

Solution: Regular monthly reviews

Summary Checklist #

Weekly:

• [ ] Review recent blocks
• [ ] Check for patterns
• [ ] Verify important numbers

Monthly:

• [ ] Full list review
• [ ] Remove outdated entries
• [ ] Update product selections
• [ ] Analyze blocking patterns

Before Campaigns:

• [ ] Check blocked list
• [ ] Verify important numbers
• [ ] Review product selections

Regular:

• [ ] Validate number formats
• [ ] Search before adding
• [ ] Document changes
• [ ] Monitor patterns