B2B Cold Calling in Mexico and Argentina: DNC Rules

DNC LATAM · Compliance guides

No — selling to a business, rather than a consumer, does not put a call outside Mexico’s REPEP or Argentina’s Registro Nacional No Llame. Neither registry is scoped by who answers the phone. Mexico’s REPEP is built from individual consumers registering their own landlines and mobiles, and Argentina’s Law 26.951 covers any company that “advertises, offers, sells or gifts goods or services by phone” to an Argentine number. Nothing in either framework carves out a phone number just because the call is a B2B sales pitch rather than a consumer offer.

Why US teams assume otherwise

The assumption usually travels from the US TCPA world, where a lot of B2B telemarketing sits in genuinely different territory: the National DNC Registry is built around residential consumer numbers, and a large share of US B2B cold-calling programs are structured around that distinction. It’s a reasonable habit to bring — right up until the campaign crosses into Mexico or Argentina, where the registry logic is not organized the same way.

Our guide to TCPA vs. Mexico and Argentina DNC rules covers several of these exact mismatches: consent models, refresh cadence, and enforcement triggers that don’t map cleanly from a US mental model. The B2B-versus-consumer assumption is the same pattern applied to audience type instead of call type. A sales team standing up a Mexico or Argentina campaign for software, industrial equipment, financial services, or any other B2B product tends to inherit a “this is B2B, so DNC doesn’t apply” instinct from its US playbook, without checking whether that instinct actually holds in the destination country.

What the registries actually key on

REPEP and No Llame both operate on the phone number and the nature of the contact, not on a classification of “consumer” versus “business” traffic:

  • REPEP is a per-number opt-out list. A consumer registers a specific landline or mobile number, and that registration applies to marketing calls and messages “across regulated commercial sectors.” The registry doesn’t ask what’s being sold or to whom — it flags the number. If a business landline or a business owner’s mobile happens to be registered, REPEP treats it the same as any other registered number. See what REPEP is for the mechanics of that registration model.
  • Law 26.951 is scoped by activity, not audience. The statute applies when a company “advertises, offers, sells or gifts goods or services by phone.” A B2B sales call that offers a product or service by phone is squarely inside that description — the law doesn’t distinguish a pitch made to a purchasing manager from one made to a consumer. Our Law 26.951 deep dive covers what triggers that obligation in more detail.

Neither registry page publishes a business-number carve-out, and we won’t invent one. What’s actually established is that the check runs on the number and the offer. Whether a specific script — say, a scheduled equipment-maintenance call to an existing vendor contact — falls outside “marketing” is the same counsel question raised for other content-dependent edge cases, not something a “but it’s B2B” label resolves on its own. See DNC for debt collectors for how that same content-versus-caller distinction plays out in a different vertical.

Where this actually bites outbound teams

A few patterns show up repeatedly in B2B campaigns that assumed they were out of scope:

  1. Purchased B2B contact lists mix personal mobiles with office lines. A “decision-maker” list bought from a data vendor often lists a mobile number that’s also the person’s personal line — the same number a consumer could register with REPEP or No Llame in their personal capacity.
  2. SaaS and software sales teams treat cold outbound as inherently exempt. A demo-booking call to a prospect in Mexico City or Buenos Aires is still an offer of a service by phone. The registry check doesn’t care that the product is enterprise software rather than a consumer good.
  3. Nearshore SDR floors run US and LATAM B2B campaigns off the same suppression list. A team dialing +52 or +54 numbers for B2B pipeline generation needs the same destination-specific scrub as a consumer campaign — see DNC for contact centers for how that plays out across shared dialer floors.

What to actually check before a B2B campaign

The operational fix mirrors any other outbound campaign into Mexico or Argentina — the audience label doesn’t change the workflow:

  1. Scrub the destination number, not the deal type. Run every +52 number against the current REPEP release, and every +54 number against the current No Llame download, regardless of whether the CRM tags the record “business” or “consumer.” Our DNC checker guide covers verifying individual numbers before a call.
  2. Keep the same cadence discipline. Mexico refreshes REPEP every 15 days; Argentina expects a current consult before each campaign. A B2B list is not exempt from that clock. See the refresh table in DNC scrubbing vs US TCPA for the standard by country.
  3. Honor a direct opt-out the same way. If a purchasing contact says stop calling, that instruction is binding immediately, independent of whether the number is ever formally registered — the same rule covered in our DNC opt-out training guide.
  4. Let counsel classify genuine edge cases, like account-management calls to an existing paying customer versus a cold B2B pitch, rather than defaulting to “business number, so it’s exempt.”

The practical takeaway

Treating a B2B contact list as automatically outside Mexico’s or Argentina’s DNC rules is a common and avoidable gap — the registries check the number dialed and the nature of the offer, not the size or type of the audience on the other end. DNC LATAM maintains official REPEP and No Llame access and returns the same scrub result whether the list is tagged consumer or B2B, so the check doesn’t depend on getting that classification right in the first place.