The antitrust angle can a dot brand block competitors from registering keywords

As the domain name system prepares for its next major expansion through ICANN’s forthcoming round of new gTLDs, a renewed spotlight is being cast on the competitive and legal implications of brand-owned top-level domains. Dot-brand gTLDs—such as .apple, .microsoft, or .bmw—offer companies the opportunity to operate their own private namespaces, providing unparalleled control over domain structure, security, and brand presentation. But as more companies prepare to apply for these exclusive registries in the upcoming round, a contentious legal question is resurfacing: can a .brand TLD operator use its control to block competitors from registering generic or competitive keyword domains, and if so, does that behavior raise antitrust concerns?

At the core of the issue is the structural power that comes with being the registry operator of a dot-brand. Unlike open generic TLDs, which are accessible to the public and governed by standardized rules around registration, dot-brand registries operate as closed systems, where the brand owner is both gatekeeper and sole registrant. This model is permitted under Specification 13 of ICANN’s Registry Agreement, which exempts dot-brands from the requirement to offer their domains through third-party registrars and allows them to restrict registrations to themselves and their affiliates. As a result, a .brand registry can decide precisely which second-level domains to activate, retain, or withhold entirely, without external oversight.

This level of exclusivity raises strategic and legal implications when generic or competitive terms are involved. For example, a brand operating .brand could choose to register and reserve domains such as competitornames.brand, category.brand (e.g., smartphones.brand or software.brand), or even negative terms like complaints.brand, without providing a channel for competitors to present alternative or rebutting content. The brand might also preemptively block domains like discount.brand or compare.brand that could otherwise be used for price comparison, product reviews, or alternative offerings. In doing so, the brand consolidates not just its identity, but also its messaging control and competitive posture across a new slice of the internet’s address space.

From an antitrust standpoint, the key question becomes whether this behavior constitutes an abuse of market power, particularly in cases where the brand operates in a dominant or near-monopoly position in its sector. Antitrust law in most jurisdictions—especially under the U.S. Sherman Act or EU Competition Law—prohibits companies with significant market power from engaging in exclusionary conduct that harms competition or consumer choice. If a .brand TLD is used not just to promote the brand but to suppress alternative voices, limit interoperability, or stifle competitive comparison, it may fall within the scope of anticompetitive behavior.

The competitive risk is magnified in digital markets where search visibility and domain discoverability are directly tied to user traffic and commercial success. While ICANN’s policy framework does not require .brand registries to offer registration services to third parties, antitrust scrutiny could emerge if a brand’s refusal to allow certain terms under its TLD materially impedes a competitor’s ability to reach consumers or participate in the market. For example, if a leading pharmaceutical company operated .brand and reserved the domain generics.brand without providing a balanced informational site or redirecting to third-party sources, it might raise regulatory concerns about deceptive suppression of competitive information.

There is also the question of keyword capture. Many companies applying for dot-brand TLDs in the next round may seek to proactively reserve generic or high-traffic terms that align with product categories or market segments. While this may seem a logical extension of trademark strategy, it blurs the line between brand protection and market foreclosure. A .brand owner might register insurance.brand and populate it exclusively with its own products, while denying any competing use or even neutral explanation of alternatives. Though this is technically permissible under the current ICANN model, the broader market effects could be subject to legal challenge, especially if the brand already occupies a dominant share in that vertical.

Antitrust implications become even more complex when dot-brand TLDs intersect with vertical integration. Many major brands also operate retail platforms, cloud services, or distribution networks. If such companies use their gTLDs to prioritize their own listings or suppress competitor mentions entirely—especially in spaces where consumers seek objective information—it could be construed as discriminatory self-preferencing. The European Commission and U.S. Department of Justice have both taken aggressive positions on platform neutrality in recent years, and it is plausible that dot-brand TLD behavior could be swept into broader antitrust enforcement against dominant digital actors.

It is also worth noting that consumer harm, the linchpin of antitrust enforcement, may be argued in cases where a dot-brand restricts access to information that would otherwise empower users to make informed choices. This includes pricing transparency, availability of alternatives, or safety and efficacy comparisons in regulated industries. By using their TLDs to tightly control narrative and suppress dissent, companies may unwittingly provide a basis for regulators to intervene, particularly if the domain becomes a critical gateway for users searching for sector-specific information.

ICANN’s current framework does not impose competitive neutrality requirements on .brand registries, and to date, there has been no formal antitrust litigation involving a dot-brand’s use of domain policy. However, the next round may bring heightened scrutiny as larger, more powerful applicants enter the space with broader strategic ambitions. Regulatory bodies may begin to examine TLD usage patterns, including registration policies, domain blocking behavior, and metadata practices, to determine whether brands are using their exclusive namespaces in ways that distort market access.

One potential mitigation could come through ICANN’s own policy tools. The community may propose updates to Specification 13 or the Registry Agreement to prohibit certain anti-competitive domain blocking or require minimal transparency in domain reservation practices. Alternatively, external regulators may begin to request data from ICANN or registries when investigating digital market behavior. As the DNS becomes more vertically integrated into brand ecosystems, the likelihood that antitrust law will be invoked to constrain TLD-based exclusion strategies will rise.

In conclusion, while a .brand TLD offers legitimate advantages in trust, consistency, and digital security, its ability to block competitors from registering keywords—either directly or by omission—raises serious competitive and legal considerations. As dot-brands become more prevalent in the next gTLD round, particularly among market-dominant firms, stakeholders across policy, law, and civil society will need to examine whether these digital fortresses respect the competitive dynamics of open markets. Ultimately, how brands wield their control over top-level domains may become not just a matter of brand strategy, but of regulatory compliance and fair digital competition.

As the domain name system prepares for its next major expansion through ICANN’s forthcoming round of new gTLDs, a renewed spotlight is being cast on the competitive and legal implications of brand-owned top-level domains. Dot-brand gTLDs—such as .apple, .microsoft, or .bmw—offer companies the opportunity to operate their own private namespaces, providing unparalleled control over domain…