Practical Guide
Can a blacklisted number become clean again?
Detective Mouse's diagnosis for your number fleet.
7 minutes
January 2026
xx
99.9°C
DETECTIVE MOUSE
The probability of recovery:
90%
15-day rest
50%
Moderate usage
25%
Multi-complaints
10%
Proven scam
The Weight of the Past (Aging Signal)
VERY HEAVY
LIGHT
Time passing
Recent (< 7d)
15 days
30 days
Veteran (90d+)
Theoretical Recovery Table
| Initial Score | Rest Time | Success Rate |
|---|---|---|
| Nuisance (70-80%) | 15 days of rest | 90% |
| Negative (80-90%) | 30 days of rest | 70% |
| Spam / Fraud (90%+) | Change number | < 20% |
The 4 Scenarios
1. Easy Recovery
Simple algorithmic tag after an activity spike. Rest is enough.
2. Borderline Usage
A few isolated complaints. Requires rest + volume reduction.
3. Repeat Offender Tag
Already flagged multiple times. Recovery is uncertain and lengthy.
4. Impossible
Broken number. Flagged for fraud or scam. Straight to the trash.
Score Tracking (Example)
Week 1Week 2Week 3Week 4Week 5Week 6
Risk Score9.8 → 1.2
Delivery StateBlocked → OK
Why some NEVER recover?
!
DID Pollution
The entire number block is burned because neighbors are doing mass spam.
!
Long Retention
Some third-party directories keep the "Spam" flag for 12 months.
!
Scam Association
If the number has been linked to banking or CPF fraud: lifetime blacklist.
!
Multi Repeat
The 3rd flag is often permanent for modern algorithms.
Economic Calculation: Wait vs Replace
Cost of Waiting
- • 15 to 30 days of lost productivity
- • Ongoing line fees
- • Risk of immediate reinfection
- TOTAL: approx. €450 / line
Cost of New
- • New number setup (€10)
- • Instant activation
- • Clean reputation (Score 0)
- TOTAL: approx. €25 / line
Frequently Asked Questions
Free diagnosis of your fleet
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