Line Type
Know if a number is mobile, landline, or VoIP. Filter invalid numbers before contact attempts.
Validate Any US & Canada Phone Number
Real-time phone validation API powered by carrier records. Line type, carrier DIP, portability, geolocation — one call, all data.
Starting at $0.001 per call — Free tier available on RapidAPI
Try It Free
Test a phone number
Capabilities
Everything you need in one API call
Carrier DIP
Direct carrier lookup returns the operating carrier name and OCN identifier code.
Portability
Up-to-date number portability status. Know if a number has been ported to another carrier.
Deliverability
Determine instantly whether a phone number is reachable and can receive calls or SMS.
Geolocation
City, country, and metro area data based on the area code. Precise timezone information.
GeoIP
Provide an IP with your request and get precise timezone and location data for the phone owner.
Routing
Local Routing Number (LRN) — the most accurate data used for call and SMS routing.
Blacklist
Check against our internal platform blacklist for flagged numbers. An extra signal for your filtering logic.
Example Response
What you get back
GET
/api?phone=8182925409&ip=136.38.145.14 {
"subscriber": "8182925409",
"optDate": "2024-08-15T18:55:56.532Z",
"action": "send",
"deliverable": "true",
"nanpType": "mobile",
"blackList": "false",
"ipResult": "valid-v4",
"dip": "success",
"dipLrn": "8182925409",
"dipPorted": "false",
"dipOcn": "6010",
"dipCarrier": "AT&T",
"dipCarrierSubType": "WIRELESS",
"dipCarrierType": "mobile",
"geoCountry": "US",
"geoCity": "Riverside",
"geoMetro": 803,
"geoSource": "ip",
"timezone": "America/Los_Angeles",
"tzOffset": 8
}Subscriber Info
The queried phone number and timestamp of the request.
Carrier DIP
Carrier name, type, OCN code, LRN routing number, and porting status.
Deliverability
Whether the number is deliverable, the recommended action, line type, and internal blacklist flag.
Geo & Timezone
Country, city, metro area, timezone, and UTC offset based on IP or area code.
Why CheckThatPhone
Built for developers who value accuracy
All-in-One
One API call returns carrier, line type, portability, geo, and routing data. No need for multiple providers.
Real-Time Data
Sourced directly from carrier records and the Mobile Switching Center. Not cached, not stale.
Best Rates
From $0.001 per call on RapidAPI plans, even less on custom plans. Free tier available.
Privacy First
We don't store your data. It is deleted right after your request is processed. Zero retention.
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Start validating phone numbers in minutes. Free tier on RapidAPI — no credit card required.