# CheckThatPhone, free: Phone validation API > CheckThatPhone is a phone number validation API for US and Canadian numbers that returns validation, a live carrier dip, geoIP, an optional TCPA litigator scrub, landline-SMS reachability and a free state-DNC check in one call. CheckThatPhone's phone validation API on its Free plan, $0.00 per 1,000 phones. 5 of the 9 key fields: Number, Type, Carrier, Porting and roaming, Place. - This page: https://datacircle.dev/validate-phone-apis/checkthatphone/free - Get it: https://checkthatphone.com/pricing - Its API docs: https://checkthatphone.com/docs - Sold by: CheckThatPhone (https://checkthatphone.com) - Checked: 2026-10-20 ## In the answer - Completeness: 56% - Number: ✓ - Type: ✓ - Carrier: ✓ - Porting and roaming: ✓ - Place: ✓ ## Price - $ per 1,000: $0.00 - Billing: free ## Aggregators - Aggregators: none ## Charges - Per: call - Extra fields: litigator, litigator type, litigator name: +$0.00 · landline SMS lookup performed, landline SMS enabled, landline SMS provider, landline SMS provider reference ID, landline SMS provider country code: +$0.00 - Also pays for: nothing else ## Not found - $ per 1,000: $0.00 ## In their words - Their pitch: CheckThatPhone is a phone number validation API for US and Canadian numbers that returns validation, a live carrier dip, geoIP, an optional TCPA litigator scrub, landline-SMS reachability and a free state-DNC check in one call. ## Data - Freshness: live (deactivation date, state DNC: 7 days) - Keep data: no limit - Use data: You may not use the service to: Violate any law or regulation, including the Telephone Consumer Protection Act (TCPA) and equivalent state or international laws, Harass, stalk, intimidate, or target any specific individual, Attempt unauthorized access to our systems, other customers' data, or our upstream providers, Reverse-engineer, decompile, or disassemble the service, Scrape the website or dashboard outside of normal browser usage, Resell, sublicense, or redistribute API responses as a competing product without our written permission, Spam, send unsolicited communications, or use validation results to facilitate spam, Submit phone numbers you do not have a lawful basis to look up, Make or support decisions about a person's eligibility for credit, insurance, housing, employment, or any other purpose regulated by the Fair Credit Reporting Act or similar laws [...] You represent and warrant that you have a lawful basis to submit each telephone number you look up, that you will use results only in compliance with applicable law, including the TCPA, state telemarketing and do-not-call laws, and privacy laws, and that you will not use the service, or any result, to make or support decisions about a person's eligibility for credit, insurance, housing, employment, or any other purpose regulated by the Fair Credit Reporting Act or similar laws. ## Plan - Pay: $0 - You get: 500 credits a month - Enough for: 500 calls a month - Expires: at the start of each billing month ## Rate limit - Batch: 1 ## Speed - Answer: in the call ## The call - You send: phone. Optional: ip, litigatorFilter, landlineSmsLookup, dncState, dncComplainer, dncOther - Method: POST - Path: /v1/lookup ## About the plan - Plan: Free - Who can get it: anyone with a card on file ## The 35 fields the plan's answer can hold success, credits used, phone number, lookup date, action, deliverable, error, reason, deactivation date, blacklisted, SMS eligible, do not SMS, original line type, original carrier, carrier sub-type, carrier dip status, LRN, ported, OCN, carrier, line type, IP validation result, country code, state, city, metro area code, location source, time zone, UTC offset, state DNC checked, state DNC, complainer list checked, DNC complainer, DNC other checked, state DNC covered ## CheckThatPhone's plans (9) - [CheckThatPhone, free](https://datacircle.dev/validate-phone-apis/checkthatphone/free/llms.txt): $0.00 per 1,000, 56% complete, live (deactivation date, state DNC: 7 days) - [CheckThatPhone, $5 monthly](https://datacircle.dev/validate-phone-apis/checkthatphone/5-monthly/llms.txt): $5.00 per 1,000, 56% complete, live (deactivation date, state DNC: 7 days) - [CheckThatPhone, $30 monthly](https://datacircle.dev/validate-phone-apis/checkthatphone/30-monthly/llms.txt): $3.00 per 1,000, 56% complete, live (deactivation date, state DNC: 7 days) - [CheckThatPhone, $100 monthly](https://datacircle.dev/validate-phone-apis/checkthatphone/100-monthly/llms.txt): $1.00 per 1,000, 56% complete, live (deactivation date, state DNC: 7 days) - [CheckThatPhone, $450 monthly](https://datacircle.dev/validate-phone-apis/checkthatphone/450-monthly/llms.txt): $0.90 per 1,000, 56% complete, live (deactivation date, state DNC: 7 days) - [CheckThatPhone, $51 yearly](https://datacircle.dev/validate-phone-apis/checkthatphone/51-yearly/llms.txt): $4.25 per 1,000, 56% complete, live (deactivation date, state DNC: 7 days) - [CheckThatPhone, $306 yearly](https://datacircle.dev/validate-phone-apis/checkthatphone/306-yearly/llms.txt): $2.55 per 1,000, 56% complete, live (deactivation date, state DNC: 7 days) - [CheckThatPhone, $1,020 yearly](https://datacircle.dev/validate-phone-apis/checkthatphone/1020-yearly/llms.txt): $0.85 per 1,000, 56% complete, live (deactivation date, state DNC: 7 days) - [CheckThatPhone, $4,590 yearly](https://datacircle.dev/validate-phone-apis/checkthatphone/4590-yearly/llms.txt): $0.765 per 1,000, 56% complete, live (deactivation date, state DNC: 7 days) ## CheckThatPhone's calls (1) - `POST /v1/lookup`: [CheckThatPhone, free](https://datacircle.dev/validate-phone-apis/checkthatphone/free/llms.txt) ## Similar plans of other providers - [HLR Lookup, free](https://datacircle.dev/validate-phone-apis/hlr-lookup/free/llms.txt): $0.00 per 1,000, 89% complete, live - [seven.io, free, test credit, GET /api/lookup/hlr](https://datacircle.dev/validate-phone-apis/seven-io/free-test-credit-get-api-lookup-hlr/llms.txt): $0.00 per 1,000, 78% complete, live - [Dexatel, free](https://datacircle.dev/validate-phone-apis/dexatel/free/llms.txt): $0.00 per 1,000, 67% complete, live - [RealPhoneValidation, free](https://datacircle.dev/validate-phone-apis/realphonevalidation/free/llms.txt): $0.00 per 1,000, 44% complete, live ## Sources From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-10-20. - https://checkthatphone.com - https://checkthatphone.com/.well-known/openapi.json - https://checkthatphone.com/docs - https://checkthatphone.com/docs.md - https://checkthatphone.com/pricing - https://checkthatphone.com/pricing.md - https://checkthatphone.com/terms