Stop Calls Marked as Spam in Sparkforge Phone

If your business calls show up as Spam Likely or Scam Likely, answer rates drop and trust erodes. Carriers use machine learning across call volume, complaint history, and caller ID authentication to decide what gets flagged. Here's why it happens and how to fix it inside Sparkforge.

Why Calls Get Flagged

• High call volume — too many outbound calls in a short window looks like a robocall pattern.
• Unfamiliar caller ID — numbers without registered names or trust history get penalized.
• Customer complaints — even a few user reports can flip a number to flagged.
• Low pickup rates — if most calls go unanswered, carriers learn to deprioritize the number.
• Failed SHAKEN/STIR — unverified caller ID is treated as suspicious by default.

Impact on Your Business

• Lower answer rates and fewer connected calls
• Damage to brand reputation when prospects see Spam Likely
• Calls dropped or filtered before they reach the recipient

Fix #1: Voice Integrity

Voice Integrity registers your U.S. phone numbers with the major caller ID analytics providers — First Orion, Hiya, and TNS — to clear bad reputation labels and increase pickup rates.

Requirements

• SHAKEN/STIR certification (required)
• CNAM registration (recommended)
• U.S. numbers only — international traffic is not supported

How to Enable

1. Navigate to Settings → Phone Numbers → Trust Center → Voice Integrity.
2. Fill out the form with your business and number details.
3. Submit. Applications are typically processed within two business days.
4. Track status under Submitted Applications in the Trust Center.

Each provider reviews independently. Confirmation emails arrive within two business days; spam label removal across networks takes longer.

Fix #2: SHAKEN/STIR Authentication

SHAKEN/STIR is the U.S. caller ID authentication standard. Without it, carriers treat your traffic as potentially spoofed.

An EIN is required to complete SHAKEN/STIR registration. If you don't have one, register with the Free Caller Registry instead.

Fix #3: CNAM Registration

CNAM displays your business name as caller ID on most U.S. carriers. Verified business names are answered far more often than bare numbers.

Fix #4: Calling Best Practices

• Spread calls across multiple numbers and time windows instead of bursting from one DID.
• Respect Do Not Call lists and remove unresponsive contacts after two or three attempts.
• Leave voicemails — it improves engagement metrics carriers track.
• Match caller ID to the area code of the contact when possible.
• Monitor Free Caller Registry and report to clear false flags.