Exactly how long should I let a number rest?

It depends on the score: 48h preventive rest every 5 days, 1-2 weeks for a score of 50-70, and 4-8 weeks for a score above 70.

Is rest always enough to recover a number?

In 80% of cases, yes. But if the score exceeds 90 or the number is blacklisted in multiple databases, replacement is sometimes preferable.

How do I know when to put a number back in service?

Check the score on huhu.fr before each resumption. A score below 30 indicates the number can be safely reused.

Is preventive rest really necessary?

Absolutely. It's the difference between never having a problem and having to deal with burned number emergencies. Prevention costs €0.

Can I speed up a number's recovery?

Not really. Databases have their own update cycles. Rest remains the most reliable method and the only guarantee.

EXPERT GUIDE

How long should you let a number rest ?

The definitive guide to preserving your prospecting lines' reputation

10 min read

Updated 2025

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INSPECTOR HUHU

THE PRESCRIPTION

PREVENTIVE REST

48h every 5 days

Standard rotation to maintain good reputation.

CURATIVE REST (SCORE 50-70)

1 to 2 weeks

The number is starting to get reported. Rest is mandatory.

INTENSIVE REST (SCORE 70+)

4 to 8 weeks

Number is burned. Long rest or replacement needed.

Rest protocols

1. 2/5 Rotation

2 days of rest every 5 days of use. The baseline protocol for moderate volumes.

For: Standard B2B, < 40 calls/day

2. 1/1 Rotation

1 day of use, 1 day of rest. For sensitive sectors with high volumes.

For: Insurance, real estate

3. 1/2 Rotation

1 day of use, 2 days of rest. The recommended protocol for high-risk sectors.

For: Energy, CPF, lead gen

4. Rotating pool

Numbers rotate automatically in a pool. Each number rests naturally thanks to rotation.

For: All volumes, all teams

Rest based on usage intensity

IntensityRecommended rest

Intensive

> 50 calls/day

1 day of rest for 1 day of use

Moderate

20-50 calls/day

2 days of rest every 5 days

Light

< 20 calls/day

1 day of rest per week

Why rest works

Report decay

Anti-spam databases weight reports by age. An inactive number sees its score gradually decrease.

Community database forgetting

Apps like Truecaller give more weight to recent reports. Inactivity allows natural cleanup.

Carrier counter reset

Carriers analyze call volume over rolling windows. Rest resets the counters to zero.

The 4 rest mistakes

Rest too short

Putting a number back in service after only 2-3 days when its score is > 70 is useless. The score hasn't had time to drop.

No check before resumption

Resuming a number without checking its current score risks burning it permanently on the first day.

Rest without rotation

Resting a number without having a replacement number paralyzes sales activity.

Same volume after rest

Resuming with the same call volume that caused the report guarantees a quick relapse.

Weekly rotation schedule

Line	S1	S2	S3	S4	S5	S6	S7
Line A	ACTIVE	ACTIVE	REST	REST	ACTIVE	ACTIVE	REST
Line B	REST	ACTIVE	ACTIVE	REST	REST	ACTIVE	ACTIVE
Line C	ACTIVE	REST	REST	ACTIVE	ACTIVE	REST	REST
Line D	REST	REST	ACTIVE	ACTIVE	REST	REST	ACTIVE

Each line is active 4 days and resting 3 days per week.

Rest vs. Replacement: the math

OPTION A: REST

Cost of rest: €0 (number is paused)
Duration: 2 to 8 weeks
Recovery rate: 80% of numbers
= FREE but slow

OPTION B: REPLACEMENT

Cost: €2 to €20/month per new number
Delay: immediate
Risk: the new number may also be recycled
= FAST but costly

Frequently asked questions

Industries We Serve

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