Can a business call back a number on the Do Not Call list?

What the registry is, in one paragraph

The National Do Not Call Registry is a list of phone numbers whose owners have asked not to get telemarketing calls. It is run by the Federal Trade Commission under the Telemarketing Sales Rule. Sellers who make sales calls to consumers are expected to check their call lists against it. We read two FTC documents for this guide: its guide to complying with the rule, and its questions and answers for sellers. Both are linked under Sources.

The three-month window after an inquiry

This is the case most local businesses care about. Someone asks for a quote, fills in your contact form or leaves a message asking for a call.

The FTC's guide describes an established business relationship "based on a consumer's inquiry or application regarding a seller's goods or services," which "exists for three months starting from the date the consumer makes the inquiry or application." Its Q&A puts it plainly: after an inquiry or application, "the company can call for three months."

Two practical points follow. Write down the date of every enquiry, because the clock starts then. And do not treat an old enquiry as a standing invitation: a quote request from last spring does not cover a sales call this autumn. How quickly to make that first call is its own subject: how fast a business should respond to a new lead.

The 18-month window after a purchase

For past customers the window is longer. The FTC's guide bases it on "the consumer's purchase, rental, or lease of the seller's goods or services" within the "18 months preceding a telemarketing call." The Q&A says a company "may call for up to 18 months after the consumer's last purchase."

So a yearly reminder call to someone whose furnace you serviced last winter falls inside the window. A call three years later does not, unless something else allows it. Keep the date of the last job on each customer record; a simple lead inbox or even a spreadsheet does this.

Written permission

Outside those windows, the guide describes one more route: the person's express agreement to be called. It says the agreement "must be in writing and must include the number to which calls may be made," and that "a consumer must provide consent affirmatively, such as by checking a box."

That is the same idea as consent for texts: a clear yes, given on purpose, that you can show later. What a clean one looks like is in the consent guide.

The request that closes every window

Each of those permissions ends when the person tells you to stop. The guide's wording: "A telemarketer may not call a consumer who previously has asked not to receive any more calls." It adds that the business-relationship exception applies only "provided the consumer has not asked to be on the seller's entity-specific Do Not Call list."

In plain terms, every business needs its own do-not-call list, separate from the national one, and a request to be on it beats everything else. The Q&A confirms a consumer can stop a company by "asking to be put on the company's own do not call list."

• Take the request however it arrives: on a call, by email, in a text.
• Add the number the same day and tell anyone else who makes calls for you.
• Never delete from that list, even when you delete the customer record.

The texting version of this, with the words that count, is in STOP, HELP and opt-outs.

Calling hours

The FTC's guide: "Unless a telemarketer has a person's prior consent to do otherwise, it's a violation of the TSR to make outbound telemarketing calls to the person's home outside the hours of 8 a.m. and 9 p.m. local time at the location called."

Note "at the location called." If you serve customers in another time zone, it is their clock that counts. For when people are most likely to answer inside those hours, see best time to call a lead back.

If you call people who have not contacted you

Cold sales calls to consumers are where the registry applies in full. The FTC's documents say:

• Sellers must get the registry data for an area code before calling consumers in it.
• "You must synchronize your lists with an updated version of the National Registry every 31 days."
• "The first 5 area codes of data may be accessed at no charge." Beyond that, the Q&A gives a fee of $85 per area code from October 1, 2026.
• "Violators may be subject to fines of up to $53,088 per violation," and each call may count separately.

The guide also says the registry ban "does not apply to business-to-business calls." Most small local businesses never cold-call homeowners, and that is the simplest way to stay clear of all this. The windows above exist for the everyday case: answering people who came to you. To see how many of those you are missing, run the 20-minute missed-call audit.

A simple routine that keeps you inside the lines

1. Record the date of every enquiry and every completed job.
2. Call enquiries back promptly, and within three months at the latest.
3. Keep your own do-not-call list, add to it the same day, never remove from it.
4. Call between 8 a.m. and 9 p.m. in the customer's time zone.
5. If you are ever unsure whether a call counts as telemarketing, ask a lawyer before you make it.

NewFrontDesk makes no calls for you. It keeps the date, status and notes on each enquiry so you know where each one stands; the sample inbox shows how. To talk it through, call (346) 913-7215 or request setup.

Sources

• Federal Trade Commission: Complying with the Telemarketing Sales Rule
• Federal Trade Commission: Q&A for telemarketers and sellers about the Do Not Call provisions
• 47 CFR 64.1200: the FCC's rule on calls and texts (Cornell Legal Information Institute copy)

Sources read on October 9, 2026. Fee and penalty figures are the FTC's as shown on that date and are adjusted from time to time. States have their own do-not-call laws, which can be stricter. General information, not legal advice; ask a lawyer about your own calls.