.atto
Is .atto a real TLD? Who’s applying to run it?
.atto is not contested. One application for it is on ICANN’s Reveal Day list, as of 7 October 2026. It is AttoGrid Registry, Inc..
A niche science-prefix string with a single same-named applicant; little reason for outside projects to adopt it as a main address.
the applicant's own organisation and a thin tail of physics, quantum, and nanotech projects that want a quirky SI-prefix address
The 2012 applications making the most similar bet. Chosen by AI from every string in that round, without being told what happened to any of them.
Same bet: a short Latinate/technical-register noun that is not a consumer category, carried by an applicant whose own corporate identity is the word, so the namespace lives or dies on the applicant's own use plus a thin tail of science- and analytics-flavoured projects rather than on category demand.
Same bet in string shape and constituency: a four-letter, pronounceable, essentially meaning-free token with no pre-existing community to adopt it, where the registry has to manufacture the meaning instead of inheriting one from an existing category of buyers.
Shares the structural trick of selling a scientific morpheme/prefix as if it were a word, but the bet differs in scale: 'bio' already carries mass commercial pull (organic, biotech, biography) while an SI prefix for 10^-18 addresses a specialist audience, so the two are not betting on the same buyer.
What a .atto domain is
.atto is not a TLD yet. It is a string on our record of the ICANN 2026 new gTLD round, filed under Brand. One application for it is on ICANN’s Reveal Day list.
Is the .atto domain extension real yet?
.atto is not yet a domain extension you can register: nothing resolves under it, and no registrar sells names in it. It is a string applicants have put forward in the ICANN 2026 new gTLD round, the process that decides whether it becomes one.
When can you buy a .atto domain?
You can’t yet. ICANN publishes every applied-for string on Reveal Day, 7 October 2026 at 18:00 UTC. A .atto name can only be registered after that, once the string is delegated and its registry opens. Last round's closest parallel to .atto was .locus, delegated on 9 March 2016.
Is .atto a real TLD?
Not yet. .atto is not in the DNS root, so nothing resolves under it. It’s here because .atto is on ICANN’s Reveal Day list of applied-for strings. Every entry on this page links to its source.
- AttoGrid Registry, Inc. · first recordedICANN
“ARI2663T-T55019 · AttoGrid Registry, Inc. · primary”ICANN
- Band chosen: 10-29 (vanity/narrow). 'Atto' is the SI prefix for 10^-18, used in attosecond physics and attogram-scale measurement, which gives the string a recognisable but very small technical audience; it is not a product category, a place, or a common word. The record shows one application, from AttoGrid Registry, Inc., whose name shares the string, which suggests the TLD is more likely intended around the applicant's own identity than as an open generic namespace; that is an inference from the applicant name, not a recorded fact. Even assumed fully delegated and open, demand would resemble other short, semantically narrow strings from the 2012 round (by analogy: niche-science or prefix-like strings that drew low registrations and thin aftermarkets), so it sits below the 30-49 band, which needs volume or price-driven registrations at some scale. It is above the 1-9 band because the string is short, pronounceable, and has a genuine if tiny scientific and startup-naming audience (several small companies use 'Atto' as a brand), so a handful of serious primary-identity uses over five years is plausible. Main market uncertainty: whether the registry opens the namespace broadly to third parties at a normal price point or keeps it effectively closed around its own brand; counts, prices, and operator intent are unknown from the record.