The Free Caller Registry, automated.
One API call registers your phone numbers with the analytics engines behind T-Mobile, AT&T, and Verizon spam labels — acknowledgments tracked, kept current, webhooks included. For your numbers anywhere, not just ours.
- $1/number/month — no platform fee
- Included free with RevDesk numbers
- Self-serve API key, live in minutes
"Spam Likely" is a business problem
Carriers score every calling number. Registration tells their analytics engines who you are — before behavior scoring decides for you.
"Spam Likely" kills answer rates
Carriers score unregistered numbers on behavior alone. One bad week of outbound and your best local number gets a label that tanks every campaign after it.
The registry is a manual portal
The Free Caller Registry is free — but it's a human-only form with an email verification gate, per-batch uploads, and three separate confirmations to track. Nobody does it at fleet scale by hand.
Legacy services gatekeep the fix
Incumbent registration services sell the same submission behind contracts, onboarding calls, and platform minimums. Registration is table stakes, not an enterprise project.
One call in. Three engines notified.
Submit your numbers
One API call with your business identity and an authorization attestation. Numbers hosted on RevDesk enroll themselves — no call needed.
We work the registry
RevDesk drives the Free Caller Registry submission end to end — verification gate, forms, bulk files — as your authorized submitter.
Engines acknowledge
Hiya, TNS, and First Orion each confirm receipt. We track all three acknowledgments per submission and expose them on the API.
Stay registered
New numbers auto-enroll, re-submissions refresh identity changes, and webhooks tell your systems the moment status moves.
curl -X POST https://www.revdesk.com/api/v1/number-registrations \
-H "Authorization: Bearer $REVDESK_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"phone_numbers": ["+16893560542", "+16893100649"],
"attestation": { "authorized_to_register": true }
}'Anyone with phone numbers
If your numbers dial US phones, they should be registered. However you host them, however you use them.
Shipping agents that dial? Register the fleet first.
Voice-agent traffic looks exactly like the traffic carriers built spam scoring to catch. Register every number your agents dial from — before the labels arrive, not after.
- — Register numbers programmatically as you provision them
- — Webhooks fit agent pipelines — no portal babysitting
- — OpenAPI spec designed for tool-calling and MCP clients
Your numbers don't have to live on RevDesk.
Call centers, SaaS products with telephony, dealerships, clinics — if you own US numbers anywhere, you can register them here. Bring-your-own numbers are first-class.
- — BYO numbers from any carrier or CPaaS
- — Self-serve: sign up, create an API key, top up, register
- — Cancel anytime — it's a billing stop, no lock-in
Register numbers for your customers at scale.
Agencies and platforms can run registration across every customer they manage — each submission carries the end business's own identity, tracked and billed per workspace.
- — Per-customer business identity on every submission
- — Volume-friendly: batch up to 1,000 numbers per call
- — White-label-ready under the RevDesk partner program
Registration is step one
The same API monitors spam scores and clears labels on numbers that were already flagged.
Register
Every number associated with your business identity across all three analytics engines. Auto-refreshed as your identity changes.
Monitor
Continuous spam-risk scores per number, with change webhooks the moment a carrier's view of you moves.
Remediate
Already flagged? Submit remediation ($2/number) to petition the engines to clear existing labels — same API, same wallet.
Priced like infrastructure. Because it is.
Billed monthly per registered number from your wallet. Cancel anytime — it's a billing stop, not a contract exit. See full pricing
Registration shouldn't require a sales cycle
Common questions
Book a Demo- A joint intake run by the three analytics engines — Hiya, TNS, and First Orion — that score caller reputation for the major US carriers.
- Registering associates your numbers with your business identity, which protects legitimate traffic from 'Spam Likely' labeling.
- It's free, but it's a manual, human-paced portal. RevDesk automates it end to end.
- The registry requires that the submitter is authorized to register the numbers on behalf of the business.
- For numbers you bring, the API requires an explicit attestation, which we record with the submission (who, when, exact text).
- Numbers hosted on RevDesk need no attestation — we're the service provider of record.
- Numbers hosted on RevDesk: included in the number's monthly price. Nothing to enable, on by default.
- Numbers you bring via the API: $1 per number per calendar month, debited from your wallet.
- No platform fee, no seats, no minimums. Cancelling stops billing immediately — no refund for the current month, no further charges.
- The registry accepts the submission within minutes; each engine acknowledges separately.
- Propagation into carrier spam labeling typically completes within 24–48 hours.
- Track it live: registration status and per-engine acknowledgments on the API, plus registration_submitted / confirmed / failed webhooks.
- Registration is preventive — it tells the engines who you are before behavior gets you mislabeled.
- For numbers already flagged, RevDesk also runs carrier remediation ($2/number) that petitions the same engines to clear labels.
- Best result: register everything, remediate the already-flagged, and monitor reputation continuously — one stack, one API.
- The registry itself has no un-register operation — cancelling in RevDesk stops the monthly charge and our tracking.
- The number's existing registration with the engines simply ages out per their policies.
Register your numbers today
Sign up, create an API key, and register your first numbers in minutes. RevDesk-hosted numbers are already covered — on by default, included in the price.