Every text you send to a dead number still costs you money. The carrier charges for the send attempt, not for the delivery, so an invalid, disconnected, or non-SMS-capable number is pure waste. One bad number is rounding error. A list with 10% bad numbers, sent monthly, is a recurring bill for messages no human ever reads. Validating before you send is how you stop paying for that.
Where the money actually leaks
SMS marketing campaigns
Say you have a 100,000-number list and 15% of it is unreachable. That’s 15,000 messages you pay for and nobody receives. Validation cleans the list first by checking line type and deactivation status and confirming the number is a real mobile device, so you only send to numbers that can receive the text.
Two-factor authentication
OTP codes sent to invalid numbers do double damage: you eat the send cost and the user gets locked out and files a ticket. Real-time validation confirms the number is active and text-enabled before the code goes out, which cuts failures and the support load behind them.
Sales and outreach
Cold calling and SMS prospecting burn rep time and budget on numbers that ring out or never existed. Validate first and your reps work a list of genuinely reachable people instead of a graveyard.
Real-time data beats area-code guesswork
Static databases and third-party lists fall apart the moment a number ports or a user relocates. CheckThatPhone queries real-time carrier data across the U.S. and Canada and returns:
- Accurate line type identification
- Deactivation and suspension verification
- Carrier details and portability information
- SMS deliverability assessment
- GeoIP and timezone data
See the API documentation for the full set of fields returned with each request.
Running the numbers
Take 500,000 SMS a month at $0.0075 each with a 12% undeliverable rate. That’s roughly $450 a month, about $5,400 a year, spent on messages that go nowhere. And that’s SMS alone, before you count failed voice attempts and verification retries. Validation removes that line item by catching the bad numbers before the send, not after the bill.
Next step
The pitch here is simple: a fraction of a cent per validation against a steady drip of wasted sends. CheckThatPhone’s API validates U.S. and Canadian numbers in real time, flags line type, and surfaces the contact data you need to route smartly. Read the API documentation to wire validation into your messaging flow, or explore pricing plans and start trimming the waste.