NXDOMAIN stands for Non-Existent Domain. When this name forge checks .com availability, an NXDOMAIN response from Cloudflare DNS means the name is not currently registered. It does not mean the name has never been registered. Domains that expire and complete the redemption period drop from the zone and return NXDOMAIN until someone re-registers them at the standard price.
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NXDOMAIN
A DNS response code that indicates a queried domain name does not exist in the zone.
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Portmanteau
A new word made by combining parts of two existing words.
DoH (DNS over HTTPS)
A protocol that performs DNS lookups over an HTTPS connection rather than plain UDP.
Premium Domain
A domain priced above the standard registration fee, typically because the registry or registrar has reserved it.
Trademark Class
A category in the Nice Classification system used to scope trademark registrations.
Common-Law Trademark
Trademark rights that arise from actual use in commerce, without federal registration.
TLD
Top-Level Domain. The final segment of a domain name, like .com, .io, or .ai.