DNC Screening · Do Not Call compliance

Know if you’re permitted to contact a number

Q: How often must I scrub against the National DNC Registry?

Under the FTC Telemarketing Sales Rule and FCC TCPA requirements, telemarketers must scrub calling lists against the National Do Not Call Registry at least every 31 days.

Q: What DNC lists does SubscriberVerify check?

SubscriberVerify can return Federal DNC, State DNC, and DNC complainer matches when dnccheck=1 is enabled on your account. Results appear as dncChecked and dncResult fields in the API response.

Q: Does a clean DNC result mean I can call the number?

A clean DNC result means the number was not found on checked registries, but telemarketing still requires valid consent, exemption, or established business relationship where applicable. Combine DNC screening with litigator and carrier checks for a complete pre-outreach review.

Q: What are the penalties for DNC violations?

Federal violators may face fines up to $53,088 per violation, with each call potentially treated as a separate violation. State penalties vary and may include additional fines or private lawsuits.

Q: Is there a free trial?

Yes. Start with 10,000 free lookups—no credit card required. You can also create an account with 100,000 lookups for $50.

Federal and state Do Not Call lists are suppression registries businesses must check before telemarketing calls and texts. SubscriberVerify now includes Federal DNC registry screening at no additional cost—alongside carrier lookup, litigator screening, and deliverability intelligence in one platform.

Telemarketers must scrub against the National DNC Registry at least every 31 days. Violators may face fines up to $53,088 per call—each contact can count as a separate violation.

Illustration of Do Not Call registry screening with phone shield and compliance checklist

Included Federal DNC screening at no extra cost

Every 31 days minimum National DNC scrub frequency

Up to $53,088 federal fine per violation

The complete pre-outreach picture

Five questions before you dial or text

SubscriberVerify helps teams answer the full compliance and deliverability stack—not just whether a number is reachable, but whether outreach is allowed, advisable, and likely to deliver.

Am I permitted to contact this number?

DNC screening checks Federal, State, and complainer registries so telemarketing teams can suppress numbers consumers have registered to block sales calls and texts.

Should I reach this number?

Litigator screening flags TCPA serial plaintiffs, repeat filers, and high-risk numbers before a single call or text creates lawsuit exposure.

Can I reach this number?

Carrier lookup confirms line type, carrier assignment, and whether the number is active, ported, or deactivated.

Will this message or call deliver?

Line-type, SMS-capable landline, deactivated, and ported-number signals help you avoid wasted spend on numbers that will never connect.

What’s the best way to reach this number?

Time zone, geolocation, and carrier intelligence help teams route outreach at the right time through the right channel.

Screening results

DNC fields on every lookup

Add dnccheck=1 to API requests (when enabled on your account) to return dncChecked and dncResult alongside carrier and litigator data. See API documentation for examples.

Number	DNC Checked	DNC Result	Carrier	Litigator
(212) 555-	true	Federal	AT&T	false
(480) 555-	true	Federal, State	Verizon	false
(281) 753-	true	—	T-Mobile	false

Federal Do Not Call Registry

National DNC rules telemarketers must know

The FTC maintains the National Do Not Call Registry. Consumers register at no cost, and numbers remain on the list unless removed by the user. If a number is registered, telemarketers generally cannot call or text it for marketing purposes.

31-day scrub requirement

Under the FTC Telemarketing Sales Rule and FCC TCPA, calling lists must be scrubbed against the National DNC Registry at least every 31 days.

Permanent registration

Numbers stay on the federal registry until the consumer removes them—ongoing list hygiene is not optional.

Marketing restriction

Registered numbers cannot receive telemarketing calls or promotional texts unless a valid exemption or consent applies.

Common federal exemptions

Several categories of callers are exempt from National DNC rules—but commercial calls through third-party telemarketers often still require compliance.

Political organizations (TCPA still governs many autodialed political robocalls)
Charitable & nonprofit donation solicitations
Legitimate survey & research (no sales pitch during the call)
Established business relationship (18 months after purchase; 3 months after inquiry)
Prior express written consent
Most business-to-business telemarketing calls

State Do Not Call lists

Eleven states maintain separate DNC registries

State lists may impose additional requirements beyond federal rules. Businesses operating in those states may need more frequent scrubbing, registration fees, or broader call-type coverage—including some B2B and mobile outreach.

Broader coverage for certain call and text types
Registration and access fees in some states
Different update schedules than the national registry
Additional state fines and private lawsuit risk

Platform capabilities

What’s included with every lookup

DNC screening layers on top of the SubscriberVerify platform you already use for carrier and litigator checks.

Federal DNC registry check

Screen against the National Do Not Call Registry—included at no additional cost when enabled on your account.
State DNC & complainer lists

Returns state registry and complainer matches in dncResult when applicable.
TCPA litigator screening

Combine DNC with LitigatorVerify for serial plaintiff and demand-letter risk flags.
Real-time carrier lookup

Line type, carrier name, deliverability, and ported-number status in the same response.
CSV bulk scrubbing

Upload entire lists before campaign launch via the bulk validator workflow.
REST API integration

Add dnccheck=1 at lead capture, in your dialer, or CRM. See API docs.

Who it’s for

Built for regulated outbound teams

Outbound contact centers & BPOs
SMS & telemarketing programs
Lead buyers & list brokers
Financial services & insurance
Healthcare patient outreach
Home services & solar sales teams

Get started

Scrub lists before every campaign

Run DNC checks in the SubscriberVerify dashboard, via bulk CSV upload, or programmatically through the API.

How it works

Upload CSV, API, or dashboard

Screen DNC + carrier + litigator

Suppress Remove DNC matches

Bulk list scrubbing

Upload your entire calling list and return DNC, litigator, and carrier fields in one pass—ideal for the 31-day federal scrub cycle.

Real-time API checks

Screen numbers at opt-in, in your dialer, or CRM with dnccheck=1 alongside litigator and carrier parameters.

Common questions

Frequently asked questions

Is DNC screening included with SubscriberVerify?

Yes. Federal Do Not Call registry screening is included at no additional cost when DNC is enabled on your account. Contact support to enable DNC, then add dnccheck=1 to API requests or run checks through bulk uploads.

How often must I scrub against the National DNC Registry?

What DNC lists does SubscriberVerify check?

Does a clean DNC result mean I can call the number?

What are the penalties for DNC violations?

Is there a free trial?

Ready to scrub

DNC screening + carrier + litigator intelligence

Answer “Am I permitted to contact this number?” before every campaign—with Federal DNC screening included at no additional cost on your SubscriberVerify account.