What is Spam Label Shield? Why is it required in my campaigns?

CallHub has launched Spam Label Shield—a powerful tool designed to double your answer rates and prevent your calls from showing up as spam to contacts. Here’s why it matters for your campaigns.

What is Spam Label Shield?

Spam Label Shield is a real-time monitoring system that tracks the health of your campaigns and the numbers you use as Caller ID.

• It detects when a number is flagged as spam.
• It identifies who marked it as spam (carrier, FTC, or app).
• It automatically replaces the flagged Caller ID with a new, clean number, keeping your campaigns running smoothly without disruption.

Why Spam Label Shield?

• Legitimate calls are being marked as “Spam/Spam Likely.”
• Caller ID reputation changes frequently, often without campaign managers knowing.
• Carrier filtering has increased since 2021 due to the TRACED Act and FCC SHAKEN/STIR rules.
  
• Campaign managers often can’t tell why calls aren’t answered.

How do carriers mark a number as spam?

Carriers monitor call volumes for unusual activity. If a number exceeds certain thresholds (calls per minute, per day, or per week), it may be flagged as a potential robocall or spam source.

When flagged, the number gets a spam score that reduces its deliverability. Spam Label Shield detects this and replaces the number with a clean one to maintain call performance.

Can a Number’s History Impact Its Spam Score?

Yes. Even after a carrier’s resting period (usually 15 days), numbers with a severe spam history may take 30–180 days to fully cool off.

Because carriers sometimes recycle numbers early due to limited availability, you may unknowingly rent a number that already has a poor reputation. This makes it more likely to be flagged again during your campaign.

Spam Label Shield minimizes this risk by replacing numbers before they affect your results.

What happens when a number is flagged?

When a number is flagged as Spam, the CallHub system identifies this report and replaces the number with a new "clean" number to ensure the user's campaigns are not interrupted.

You can navigate to the "Numbers" section under the "Rented Numbers" tab and hover over the "Flagged" option to find out who exactly marked the number as Spam.

A rented number can be marked as Spam if

1. It is marked as Spam by the carrier.
2. It is marked Spam by third-party applications such as Nomorobo or Robokiller.
3. It has an FTC complaint against it.
4. All of the above.

✅ With Spam Label Shield, you protect your campaigns from spam labels, ensure higher answer rates, and maximize ROI.

The table below is a campaign health classification based on the answer rate percentage. We highly recommend you use the Spam Shield feature if the answer rate of your campaign is below 50%.