ICANN — Domainee Glossary

ICANN is the nonprofit that coordinates the global DNS root, accredits registrars, and decides what new TLDs get created.

ICANN (Internet Corporation for Assigned Names and Numbers) is the nonprofit that runs the policy infrastructure of the domain name system. They don't sell domains, they don't operate the DNS root servers directly, but they set the rules that registries and registrars follow.

It's a California-based nonprofit, founded 1998, formally independent of the US government since 2016 (the IANA functions transition).

What ICANN actually does

Accredits registrars for gTLDs (.com, .io, .app, etc.). To sell domains under a gTLD, a registrar must be ICANN-accredited.
Contracts with registries. ICANN sets the terms under which Verisign operates .com, Google operates .app, etc. The contracts include pricing rules, technical standards, and dispute-resolution requirements.
Approves new TLDs. The 2012 New gTLD program brought hundreds of new TLDs into existence (.shop, .dev, .tech, all the way to weird ones like .ninja).
Operates the IANA functions. Manages the root zone (the master list of all TLDs and which servers host them). Allocates IP address blocks to regional registries (ARIN, RIPE, etc.).
Runs UDRP. The Uniform Domain-Name Dispute-Resolution Policy. The process for resolving trademark vs. domain-name disputes without going to court.

What ICANN does not do

ICANN doesn't:

Sell domains.
Operate DNS for individual domains (you do that, or your registrar does).
Control ccTLDs directly. .uk, .de, .fr, etc. are managed by country-level entities (Nominet, DENIC, AFNIC). ICANN delegates to them but doesn't dictate policy.

Why it matters for a SaaS

Two practical points:

WHOIS / RDAP rules are ICANN policy. Whether you can see registrant contact info, whether privacy services are allowed, etc., are set by ICANN contracts. GDPR caused a major reshuffle in 2018: most registrars now redact registrant info by default in the public WHOIS for EU registrants.
TLD availability. If you want to offer a TLD to customers, the registry has to support it through your registrar partner. Some new gTLDs have aggressive wholesale pricing that the registry can change with 30-day notice. Track this if your business depends on cheap renewals.
UDRP exposure. If you let users pick branded subdomains or full domains, customers might unknowingly register trademarked terms. UDRP claims will hit them, not you, but you might end up in the support queue.