TCPA and B2B cold calling: what applies to mobile numbers
Updated
B2B cold calling is legal in the United States. The trap is narrower and more specific than most teams realise: there is no B2B carve-out for mobile numbers under the TCPA. A cell phone is treated as a cell phone whether it belongs to a homeowner or to a VP of Sales.
In practice that means a human manually dialling a mobile during permitted hours is generally fine, while an autodialer, a prerecorded message or an AI voice calling that same mobile needs prior express written consent. A number you bought from a data vendor is not consent, and no amount of business context makes it one.
This page is informational and is not legal advice. We are a data provider, not a law firm. Penalties here are assessed per call and there is a private right of action, so get your own counsel to sign off on your calling programme before you scale it.
Where the line actually sits
The useful distinction is not business versus consumer. It is the type of line, and how you dial it.
| What you are doing | Business landline | Mobile number |
|---|---|---|
| Human manually dialling | Generally permitted | Generally permitted |
| Autodialer (power, parallel, predictive) | Fewer federal restrictions | Prior express written consent required |
| Prerecorded or artificial voice | Fewer federal restrictions | Prior express written consent required |
| AI voice agent | Treated as artificial voice | Prior express written consent required |
| National Do Not Call registry | Most B2B solicitation calls are exempt under the FTC's Telemarketing Sales Rule | Treat a registered mobile as protected unless you have consent |
Two consequences of that table deserve spelling out, because they are where teams get caught.
Your dialer is the regulated object, not your intent. The same call to the same prospect is low risk dialled by hand and high risk dialled by a system. Nothing about the commercial purpose changes that.
Most of your direct dials are now mobiles. That is the whole reason this matters more than it did ten years ago. A B2B calling motion built on mobile coverage is, in federal terms, a calling motion built on numbers with no B2B exemption.
What "prior express written consent" is, and what it is not
It is a written agreement, signed by the person being called, that identifies the specific party authorised to call and discloses that automated calls may be used.
Three properties of it tend to surprise people.
It is specific to the calling entity. Consent given to one company does not transfer to another, which means consent you acquired with a list is not consent you hold.
It cannot be inferred from a business relationship, a form fill on an unrelated topic, or the fact that someone published their number. A mobile found on LinkedIn, pulled from a data vendor, or scraped from a signature block is not a grey area for autodialed calls. It is simply a number without consent.
It has no statutory expiry, but numbers change hands. Re-confirming consent on long-held lists is common practice for that reason rather than for a legal one.
The operational rules that apply regardless
Four requirements apply to a compliant B2B calling programme whatever line type you are dialling.
- Calling hours. Federal rules set an 8am to 9pm window in the recipient's local time zone. Several states are tighter.
- An internal do-not-call list. You must maintain one, honour requests promptly, and the obligation is independent of the national registry.
- Honour opt-outs by any reasonable means. A request to stop does not have to arrive by a channel of your choosing.
- Accurate identification. Misrepresenting who you are, why you are calling, or what the offer costs falls under the FTC's Telemarketing Sales Rule, which reaches B2B calls.
State laws are where the B2B exemption disappears
Several states have passed their own telemarketing statutes, commonly called mini-TCPAs, and some of them do not carry a B2B exemption at all. Florida, Oklahoma, Washington, Maryland and New Jersey are the ones that come up most in practice. Calling windows are often narrower than the federal one, and some require consent for any automated dialling regardless of who is being called.
The practical implication is that a nationwide calling programme is governed by the strictest state you dial into, not by the federal baseline. Teams that run a single compliance ruleset usually set it to the strictest state rather than maintaining fifty.
Why exposure is calculated per call
Statutory damages run at $500 per violating call, trebled to $1,500 where the violation is found to be willful. There is a private right of action and no aggregate cap.
The arithmetic is what makes this a board-level question rather than a sales-ops one. A single prerecorded campaign reaching ten thousand mobile numbers without consent produces $5 million in base statutory exposure before anyone argues about willfulness. Class actions in this area routinely settle in the millions, and the FTC can assess substantially more per call for registry violations.
What this means when you buy mobile data
Line type stops being a data quality question and becomes a compliance input.
If you cannot tell which of your numbers are mobile, you cannot route them correctly, and routing is the entire defence: mobiles to manual dial, landlines to whatever your dialer does. A vendor that delivers a number without a line type field has handed you a compliance decision you cannot make.
Three things to require from any US mobile data supply:
- Line type per record, mobile, landline or VoIP, as a field rather than an assumption.
- A record of where the number came from and when, because provenance is the first thing asked for when a complaint arrives.
- Clarity on what the vendor is and is not claiming. No data vendor can supply consent. One that implies its numbers are safe to autodial is describing something that does not exist.
Where Listar stands
Listar is a data provider. We supply verified mobile numbers with the line type attached, and we do not supply consent, because no vendor can.
Every delivered number carries the line type and the verification that produced it: a waterfall across more than 35 sources for coverage, then four verification layers including an attachment check confirming the line is in use and tied to the person on the record. On our own measurement, 95% of delivered mobiles were confirmed attached to the right person, from 10,000 real calls across 100 files of 100 numbers each, between May and September 2026. Internal, not audited, denominator is numbers delivered.
What you do with those numbers is your compliance programme, and the dialling decision is the part that carries the exposure. Our coverage of the United States is expanding; France is where it is strongest today.
FAQ
Is B2B cold calling legal in the United States? Yes, in all fifty states. The federal Do Not Call registry exempts most business-to-business solicitation calls, and a human manually dialling a business contact during permitted hours is generally lawful. The restrictions that bite are on how you dial mobile numbers.
Can I cold call cell phones for B2B sales? Yes, if a human dials manually and you respect calling hours and your internal do-not-call list. Autodialed, prerecorded and AI-voice calls to a mobile need prior express written consent, and that applies to a VP's business cell exactly as it applies to a consumer's phone.
Does buying a list from a data vendor give me consent to autodial? No. Consent is specific to the calling party and cannot be transferred with a list. Purchased mobile numbers without written consent are the single most litigated situation in this area.
Do I need to scrub B2B mobile numbers against the national Do Not Call registry? Most B2B solicitation calls are exempt from the national registry under the Telemarketing Sales Rule. The safer operating assumption is that a mobile on the registry should be treated as protected unless you hold consent, because courts have treated registered mobile and mixed-use numbers as residential. Your counsel should make this call for your programme.
What are the calling hours for B2B calls in the US? The federal window is 8am to 9pm in the recipient's local time zone. Several state statutes are narrower, so a nationwide programme usually runs on the strictest applicable window.
Which states have no B2B exemption? Florida, Oklahoma, Washington, Maryland and New Jersey are the ones most frequently cited, and the list changes. Treat your state coverage as something to review with counsel each year rather than as settled.
Sources
- 47 U.S.C. § 227 (Telephone Consumer Protection Act) and the FCC's implementing rules at 47 C.F.R. § 64.1200
- The FTC's Telemarketing Sales Rule, on the business-to-business exemption from the national registry and on misrepresentation
- Outbound Kitchen, The 2026 B2B Mobile Data Benchmark, June 2026, on the share of B2B direct dials that are mobile numbers
- Practitioner guidance consulted 11 November 2026. Where guidance and statute differ, the statute governs, and neither replaces advice from your own counsel