How to Fix 'Scam Likely' on Your Business Phone Calls

Your sales rep just told you that a prospect said they almost did not answer because the call showed up as "Scam Likely" on their phone. Your appointment reminder calls are going to voicemail because patients think they are robocalls. Your collections team cannot reach customers because every outbound call gets flagged.

This is not a rare problem. Billions of robocalls flood US phone networks every month. In December 2025 alone, over 3 billion spam calls were recorded in the United States. That works out to roughly 17 spam calls per person per month. Carriers and phone manufacturers have responded by building aggressive call screening into their systems. Any call that looks even slightly suspicious gets labeled, downgraded, or blocked before it reaches the recipient.

The problem is that legitimate business calls get caught in the same dragnet. If your outbound calls are showing up as "Scam Likely," "Spam Risk," "Potential Fraud," or simply "Unknown Caller," you are losing connections, revenue, and customer trust every single day.

Here is exactly what causes these labels and the specific steps to fix them.

Why Your Calls Get Labeled as Scam Likely

The "Scam Likely" label is not random. Carriers use a combination of signals to determine whether an incoming call is legitimate or suspicious. Understanding these signals is the first step toward fixing the problem.

High call volume with low answer rates. If your business places hundreds of outbound calls per day and most of them go unanswered, carriers interpret this as a spam pattern. Legitimate businesses that call people who actually want to hear from them tend to have higher answer rates. When your answer rate drops below a certain threshold, the algorithms flag your numbers.

No caller identity registered. When a call arrives with just a phone number and no business name, carriers have no way to verify the sender. Unidentified calls are more likely to be flagged because the vast majority of spoofed and fraudulent calls come from numbers with no registered identity.

STIR/SHAKEN attestation level. STIR/SHAKEN is a technology framework that authenticates the origin of phone calls. Each call receives an attestation level: Full (A), Partial (B), or Gateway (C). Calls with Full attestation have verified caller identity and authorization to use the number. Calls with lower attestation levels are treated with more suspicion by carriers.

Number reputation issues. If a phone number was previously used by a spammer, or if your number has been reported by recipients, that reputation follows the number. Even newly purchased numbers can carry baggage from previous owners.

Calling patterns that match spam behavior. Calling the same area code repeatedly, calling at unusual hours, or rapidly dialing sequential numbers are all patterns that spam detection systems watch for.

Step 1: Check Your Current Call Reputation

Before you fix anything, you need to know where you stand. Several free and paid tools let you check how your phone numbers appear to recipients across different carriers.

Call your own number from a personal phone on each major carrier (AT&T, Verizon, T-Mobile) and see what displays. If you see "Scam Likely" or no business name, you have a confirmed problem.

Check your numbers through carrier-specific reputation portals. T-Mobile, AT&T, and Verizon each have processes for businesses to query and dispute call labels on their numbers.

Your CPaaS provider may also offer number reputation monitoring. Signalmash provides visibility into how your numbers are performing across carrier networks, so you can catch reputation issues before they affect your answer rates.

Step 2: Register CNAM for Your Business Numbers

CNAM, or Caller Name, is the most basic form of call identification. When you register CNAM for your phone numbers, the recipient's carrier can look up your business name and display it alongside your number.

CNAM is limited to 15 characters and works most reliably on landlines. On mobile phones, CNAM display varies by carrier and is not universally shown. But having CNAM registered is foundational. It signals to carriers that your number belongs to a real, identifiable business, which improves your baseline reputation.

The registration process is straightforward. Through your messaging and voice provider, you submit your business name and associate it with your phone numbers. Signalmash handles CNAM registration as part of their standard service, and propagation across carrier databases typically takes a few days.

Step 3: Ensure STIR/SHAKEN Compliance

STIR/SHAKEN is a call authentication framework mandated by the FCC for US voice carriers. It works by cryptographically signing each call to verify that the caller is authorized to use the originating phone number.

The three attestation levels work like this:

Full Attestation (A): The carrier has verified the caller's identity and confirmed they are authorized to use the phone number. This is the gold standard. Calls with Full attestation are the least likely to be flagged or blocked.

Partial Attestation (B): The carrier has verified the caller's identity but cannot confirm their authorization to use the specific number. Common with ported numbers or certain VoIP configurations.

Gateway Attestation (C): The carrier knows where the call entered its network but has not verified the caller's identity. International calls and some wholesale routes receive this level.

To get Full attestation on your calls, your voice provider must support STIR/SHAKEN and must have verified your business identity. Signalmash's direct Tier-1 carrier connections support STIR/SHAKEN with Full attestation for verified business customers, which gives your calls the strongest possible authentication signal.

Step 4: Implement Branded Caller ID

This is the step that makes the biggest visible difference. Branded Caller ID goes beyond CNAM by displaying your business name, your company logo, and optionally the reason for your call directly on the recipient's mobile screen.

Instead of seeing an unknown number or a truncated 15-character name, your customer sees your full brand identity with a verified badge. The visual impact is immediate. Customers recognize your brand and are significantly more likely to answer.

Healthcare organizations implementing branded calling have reported answer rate increases of over 100 percent. Financial services firms see similar improvements for customer follow-up calls. Contact centers across industries have documented measurable reductions in wasted agent time from unanswered calls.

Branded Caller ID requires working with an authorized BCID partner. Signalmash is an official Branded Caller ID Authorized Partner, meaning they are vetted and approved to set up verified brand displays for your outbound calls. The setup involves verifying your business identity, uploading your logo and brand assets, and configuring which numbers display your branded information.

Step 5: Clean Up Your Calling Practices

Technology alone will not fix a scam likely label if your calling practices themselves trigger spam detection. Review and adjust these patterns:

1. Call people who expect to hear from you. Cold calling hundreds of numbers per day with low answer rates is the fastest way to damage your number reputation. Focus your outbound calling on contacts who have opted in or have an existing relationship with your business.

2. Do not rapid-dial sequential numbers. Dialing 555-1001, 555-1002, 555-1003 in sequence is a classic spam pattern. Randomize your call lists.

3. Respect calling windows. Calling outside of business hours triggers complaints and reports. Stick to 8 AM to 9 PM in the recipient's local time zone.

4. Monitor your answer rates. If your answer rate drops below 10 to 15 percent, your number reputation is likely degrading. Investigate before the problem compounds.

5. Rotate numbers carefully. Some businesses rotate through many numbers to avoid spam labels, but this practice can backfire. Carriers watch for rapid number cycling as a spam signal. A smaller set of well-maintained, properly identified numbers performs better than a large pool of anonymous ones.

Step 6: Dispute Incorrect Labels

If your numbers are incorrectly labeled as spam despite proper registration and clean calling practices, you can dispute the labels directly with carriers.

T-Mobile offers a form for businesses to report mislabeled calls. AT&T and Verizon have similar processes, though they are less centralized. Third-party analytics companies like TNS (which powers T-Mobile's Scam Shield) and Hiya (which provides caller ID data to Samsung and other manufacturers) also accept label disputes.

Your voice provider can often assist with the dispute process. Signalmash helps customers navigate carrier dispute procedures and provides documentation that supports your case for label removal.

The Layered Approach That Actually Works

No single fix solves the scam likely problem on its own. The businesses that maintain strong call reputations use all of these tools together:

CNAM registration establishes basic identity across carrier databases. STIR/SHAKEN compliance provides cryptographic call authentication. Branded Caller ID creates visual trust and recognition on mobile devices. Clean calling practices prevent the behavioral signals that trigger spam detection. And ongoing monitoring catches reputation issues before they spiral.

If your business depends on outbound calling and your answer rates are suffering, start with a conversation about your current setup. Signalmash provides CNAM registration, STIR/SHAKEN compliance through direct carrier connections, and Branded Caller ID as an authorized BCID partner. Their team can audit your current calling infrastructure and recommend the specific fixes that will move your answer rates in the right direction.

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