Introduction
You’ve stood up a new VoIP system, ported or provisioned fresh numbers, onboarded your team — and then someone calls a customer and gets told, “it shows up as Spam Risk on my end.” You swap out the number. Same result. You start wondering if you’ve been blacklisted somehow, or if VoIP is just fundamentally broken for outbound calls.
Neither. What you’ve run into is a mostly-invisible reputation layer that sits between your dialer and the person you’re trying to reach — and the label it puts on your call has nothing to do with whether you’re actually a scammer. It’s an algorithm making a probabilistic guess, and new business numbers are exactly the profile that guess gets wrong most often.
This article covers how that system works, why freshly provisioned numbers are especially prone to it, and what you can do to get your numbers registered so they present cleanly. The good news: most of this is fixable for free, and it doesn’t take long.
By the end of this, you’ll understand:
- Why “Spam Risk” labels exist and who’s generating them
- What STIR/SHAKEN is and why it doesn’t actually solve this problem
- Which analytics providers control the labels at each major carrier
- How to register your numbers for free across all three major US carriers in one place
- When paid branded calling is actually worth considering
The Three Layers Between Your Call and “Spam Risk”
Before getting into fixes, it helps to understand the system you’re dealing with. There are three distinct things happening when your outbound call gets labeled.
Layer 1: STIR/SHAKEN (Authentication)
STIR/SHAKEN — Secure Telephone Identity Revisited / Signature-based Handling of Asserted information using toKENs — is a framework the FCC mandated for major US carriers starting in 2021. Its purpose is to cryptographically authenticate that a caller is who they say they are, specifically to combat spoofing (making a call appear to come from a number you don’t own).
When your VoIP provider places a call, they attach a digital signature to it. The receiving carrier checks that signature and assigns one of three attestation levels:
- A (Full Attestation): The provider knows you, verified your identity, and confirmed you’re authorized to use this number. Lowest risk signal.
- B (Partial Attestation): The provider knows where the call entered their network but can’t verify you’re authorized to use the displayed number. Medium risk.
- C (Gateway Attestation): The call came through a gateway and the provider has no relationship with the originator. Highest risk — these calls are most likely to be blocked or labeled.
The critical thing to understand: STIR/SHAKEN authentication tells the carrier whether your number is spoofed, not whether you’re a spammer. A legitimate business calling from a freshly provisioned VoIP number gets an A attestation and can still be labeled “Spam Risk.” Authentication and reputation are separate systems.
Layer 2: Call Analytics Engines (Reputation)
This is where the “Spam Risk” label actually comes from. Each major US carrier has partnered with a third-party analytics provider that monitors call patterns in real time and assigns reputation scores to phone numbers. The current landscape:
- AT&T uses Hiya
- T-Mobile uses First Orion (powers T-Mobile’s “Scam Shield”)
- Verizon uses TNS (Transaction Network Services)
These engines build reputation scores by watching patterns: call volume per day, average call duration, answer rates, whether a number ever receives inbound calls, whether call recipients mark it as spam. A number that places 200 calls per day at 15 seconds average duration looks, algorithmically, exactly like a robocaller — even if every one of those calls is a legitimate business inquiry.
Fresh numbers have no history at all. No incoming calls, no established patterns, no reputation. Some analytics engines treat zero reputation the same as bad reputation. This is why swapping to a new number often doesn’t fix the problem — the new number just starts the same process over.
Layer 3: Crowdsourced Reports
Beyond algorithmic analysis, users can report numbers directly through their carrier apps or third-party apps like Robokiller, Nomorobo, or YouMail. These reports feed back into the analytics engines and can flip an otherwise clean number quickly. A handful of call recipients hitting “Report Spam” because they didn’t recognize the number — especially in the early days before your team establishes call patterns — can accelerate a labeling.
The Fix: Registration
All three analytics providers accept registrations from legitimate businesses. You’re essentially saying: “This is us. Here is our business information. These are our numbers. We are calling for [sales / customer service / appointment reminders / etc.].” Once registered, the analytics engine notes that the number belongs to a verified business and adjusts its risk classification accordingly.
The Single-Form Option: FreeCallerRegistry.com
First Orion, Hiya, and TNS jointly operate FreeCallerRegistry.com — a single portal that submits your registration to all three analytics engines simultaneously. This is the most efficient path if you’re starting fresh.
The process:
- Go to freecallerregistry.com and click Register Here
- Enter your business information: company name, website, contact info
- Choose a call Category (sales, support, alerts, healthcare, etc.) — be accurate here, it affects how the number is displayed
- Add your phone numbers (up to 20 per submission)
- Submit
Cost: free. Timeline: registrations typically propagate within 24–72 hours, though full carrier-side updates can take 3–10 business days.
This should be your first stop. It covers AT&T, T-Mobile, and Verizon in one shot.
Carrier-by-Carrier Registration (If You Need It)
If FreeCallerRegistry doesn’t resolve the issue, or if you need to file a specific dispute on a number that’s been incorrectly labeled, each analytics provider also has its own portal:
AT&T / Hiya hiyahelp.zendesk.com/hc/en-us/p/request_hub
Hiya’s portal lets you register numbers, view current spam labels on specific numbers, and see why a number was flagged. Registration doesn’t expire and there’s no cap on the number of numbers you can register for free. If a number is actively labeled and you need to dispute it, this is where to go.
T-Mobile / First Orion callreporting.t-mobile.com
T-Mobile’s call reporting portal, backed by First Orion. Use this for reporting specific numbers that are showing as Scam Likely on T-Mobile devices and for registering business numbers with First Orion.
Verizon / TNS voicespamfeedback.com/vsf
Verizon’s spam feedback portal. If your numbers are showing as spam specifically to Verizon subscribers, this is the direct path to TNS.
Sprint / TNS Sprint was acquired by T-Mobile in 2020 and fully merged by 2023 — Sprint as a separate carrier no longer exists. Former Sprint subscribers are now on T-Mobile’s network. Use the T-Mobile / First Orion portal above.
Process for New Number Provisioning
If you’re regularly standing up new numbers (adding departments, expanding teams, rotating numbers), build registration into the provisioning checklist. The time investment is real but manageable:
- Provision the number in your VoIP platform (DialPad, RingCentral, etc.)
- Log into FreeCallerRegistry.com and add the new number
- Optionally, log into each carrier portal individually if you need carrier-specific verification
- Wait 48–72 hours before heavy outbound volume on that number
- If a number gets labeled despite registration, dispute via the specific carrier’s analytics portal
The 48–72 hour window matters. Placing high outbound volume on a brand-new, not-yet-registered number is the exact pattern that triggers an algorithmic flag. Register first, then ramp up call volume.
Should You Pay for Branded Calling?
Some VoIP providers — including DialPad — offer a paid “Branded Calling” service where your business name, logo, and reason for calling appear on the recipient’s screen. It’s a legitimately useful feature for high-volume outbound operations, but it’s worth understanding what it actually covers before signing up.
DialPad’s Branded Calling routes through Hiya and TNS. That means AT&T and Verizon subscribers will see your branded display. It does not cover T-Mobile / First Orion, and it does not cover removing an existing spam label — it’s a display enhancement, not a remediation tool.
Worth considering if:
- You have a high-volume outbound operation and answer rates are a core business metric
- Your main lines (primary company number, department lines) would benefit from instant brand recognition
- You’re willing to pay for a professional caller ID experience on two of three major carriers
Not worth it if:
- Your goal is simply to stop appearing as “Spam Risk” — FreeCallerRegistry is free and covers all three carriers
- You’re provisioning a large number of lines; the economics of paying per-line don’t hold up
- You need T-Mobile coverage as your priority — branded calling won’t get you there
For most small-to-mid-sized businesses, free registration via FreeCallerRegistry gets you to the same outcome (calls showing as a business name rather than “Spam Risk”) without the added cost or vendor dependency.
Realistic Expectations
Registration improves your standing with the analytics engines, but it’s not a permanent immunization. A few things to keep in mind:
Call patterns still matter after registration. If a registered number suddenly starts placing 500 calls per day with 10-second average durations, the algorithms will notice. Registration reduces your baseline risk; it doesn’t override behavioral signals indefinitely.
Consumer reports can override registration. If call recipients are actively marking your number as spam — because they don’t recognize the number, because calls are going to wrong numbers, because your team isn’t identifying themselves clearly — those reports will accumulate. The fix here is operational, not technical: make sure your team announces themselves clearly and that your calling practices are clean.
Different carriers, different timelines. AT&T may clear a number in 48 hours while Verizon takes a week. If you’re getting reports from customers on a specific carrier, check that carrier’s specific portal status.
Not every “Spam Risk” label comes from the same place. Some labels come from analytics engines, some from crowdsourced apps (Robokiller, etc.) that operate independently. FreeCallerRegistry and the carrier portals cover the carrier-side labels. Third-party apps like Robokiller have their own dispute processes, and resolving labels there is a separate step.
Closing Thoughts
The system is imperfect by design — it’s built to protect consumers from robocallers, and legitimate businesses using VoIP at scale look like robocallers to the algorithms. The labeling isn’t malicious; it’s pattern-matching that doesn’t have enough context.
The fix is to give it context. Registration is that context: a verified statement to each analytics engine saying “this is a real business, these numbers are ours, here’s what we’re calling about.” It takes 15 minutes to file, it’s free, and it covers the three carriers that matter for most US businesses.
If this saved someone an afternoon of debugging or a conversation with a DialPad sales rep about branded calling pricing — good. The next person who provisions a new department line and immediately gets “Spam Risk” complaints shouldn’t have to start from zero.
Registration Links
| Provider | Carrier(s) | URL |
|---|---|---|
| FreeCallerRegistry | AT&T, T-Mobile, Verizon | freecallerregistry.com |
| Hiya | AT&T | hiyahelp.zendesk.com/hc/en-us/p/request_hub |
| First Orion / T-Mobile | T-Mobile | callreporting.t-mobile.com |
| TNS / Verizon | Verizon | voicespamfeedback.com/vsf |