For agents, teams and investors
Check every number on a skip-traced, expired or FSBO list before it reaches your dialer or texting tool: mobile or landline, deactivated by the carrier, on a state do-not-call list, a known TCPA litigator, and the local time where the number was issued.
| Number | The lookup says | Do this |
|---|---|---|
| (305) 555-0142 | Mobile, Florida (no state DNC check) | Check FL list |
| (206) 555-0119 | Landline, can't take texts | Call only |
| (602) 555-0187 | Deactivated by the carrier Oct 2 | Drop |
| (704) 555-0163 | Known TCPA litigator | Suppress |
| (614) 555-0131 | State DNC match | Suppress |
Fictional 555 numbers.
About 32% of the numbers we look up are landline or VoIP, and most landlines can't take a text. A number the carrier has deactivated can't take a call either.
Source: CheckThatPhone lookup data
nanpTypedeactivationDate More than one call in 12 months that breaks the do-not-call rules lets the person sue for up to $500 per violation, or up to three times that if it was willful.
47 U.S.C. 227(c)(5) · law.cornell.edu
litigatordncStateResultdncComplainerResult No telephone solicitations before 8 a.m. or after 9 p.m., local time at the called party's location.
47 CFR 64.1200(c)(1) · ecfr.gov
timezonetzOffset Landlines usually can't take texts, but about 7% of the landlines we check can. The landline SMS check finds them for 1 extra credit per landline.
Source: CheckThatPhone lookup data
smsEligibledipMessagingEnabled Skip-trace results, expireds, FSBOs, or your sphere exported from the CRM.
CSV upload in the dashboard (deduplicated, up to 1,000,000 rows), or one API call from your lead form or CRM webhook.
Before anything reaches the dialer or texting tool. Then re-scrub your sphere monthly to catch new deactivations.
Read these fields from every response. Absent DNC fields mean the check didn't run, not that the number is clear.
| If the response shows | Field | Do this |
|---|---|---|
| Deactivated by the carrier recently | deactivationDatereason | Drop it from call and text lists. |
| Landline | nanpTypedipCarrierType | Call list. Text it only if the landline SMS check returns smsEligible: "true". |
| VoIP | dipCarrierSubType = IPES | Tag it. Lower priority on investor lists. |
| Known TCPA litigator | litigator | Suppress for calls and texts. |
| On a state do-not-call list | dncStateResult = STATE DNC | Suppress unless you hold consent. |
| State check absent (CO, FL, IN, LA, MA, MS, MO, OK, PA, TN, TX and WY) | dncStateChecked | Not checked. Use your own scrub for that state. |
| On our internal blacklist | blackList | Suppress. A litigator match also sets it; reason tells you which. |
| Local time | timezonetzOffset | Schedule calls between 8 a.m. and 9 p.m. local time (8 p.m. in Florida). Without an IP, this is the area code's zone. |
The same response every customer gets, with the fields an agent acts on highlighted. This number is a ported mobile, a known TCPA litigator and a state do-not-call match, so it never reaches your dialer.
Highlighted fields: reason, nanpType, litigator, dncStateResult, timezone.
{
"success": true,
"credits_used": 2,
"data": {
"subscriber": "9195550158",
"optDate": "2026-10-08T15:42:10.218Z",
"action": "unsubscribe",
"deliverable": "false",
"reason": "Associated with TCPA Litigator DO NOT CONTACT",
"nanpType": "mobile",
"blackList": "true",
"dip": "success",
"dipLrn": "9195550199",
"dipPorted": "true",
"dipOcn": "6529",
"dipCarrierSubType": "PCS",
"dipCarrier": "T-Mobile",
"dipCarrierType": "mobile",
"litigator": "true",
"litigator_type": "plaintiff",
"litigator_name": "Jane Example",
"dncStateChecked": "true",
"dncStateResult": "STATE DNC",
"dncComplainerChecked": "true",
"dncComplainerResult": "",
"dncOtherChecked": "true",
"geoState": "NC",
"geoCity": "raleigh",
"geoCountry": "US",
"timezone": "America/New_York",
"tzOffset": 5,
"geoSource": "area-code",
"error": "false",
"doNotSms": "true"
}
}Monthly cost, with the TCPA litigator scrub (+1 credit per number):
State DNC and complainer checks never add credits. The landline SMS check adds 1 credit per landline; mobiles are not charged.
Not legal advice.
dncStateChecked is left out for them, so "not checked" never reads as clear.deactivationDate: data refreshed daily, with a 1 to 7 day lag, and entries expire after 45 days. It is not a reassigned-number check.No. It runs the state do-not-call check for 38 states plus DC and screens our national complainer list. Get national registry access from the FTC at telemarketing.donotcall.gov; the FCC's safe harbor expects a copy no more than 31 days old (47 CFR 64.1200(c)(2)(i)(D)).
Not by the state check, which doesn't cover CO, FL, IN, LA, MA, MS, MO, OK, PA, TN, TX or WY. The response leaves dncStateChecked out for those numbers, so "not checked" never reads as clear. The complainer and litigator checks still run there.
Only the ones that can take a text. About 7% of the landlines we check are SMS-capable; the landline SMS check finds them for 1 extra credit per landline, and mobiles aren't charged. Consent rules still apply.
No. We don't return subscriber names or owner details. It isn't a caller-ID or agent-safety tool.
The FCC's calling-hours rule uses local time at the called party's location (47 CFR 64.1200(c)(1)). If you pass the contact's IP, timezone comes from the IP; otherwise it is the area code's zone, which is where the number was issued, not necessarily where the owner lives now.
No list is compliant on its own. Consent records, the national registry and your internal do-not-call list are still yours to manage. This page is not legal advice.
500 free lookups a month. Upload a CSV or call the API.