Look up ICANN-accredited registrars by name or IANA ID, and see which operator sits behind them.

When a company is accredited by ICANN to sell gTLD domains (.com, .net, .org, and newer extensions), it is assigned a permanent, sequential number called an IANA ID. The simplest way to hold the two organizations in mind is one line: ICANN sets the rules; IANA keeps the numbers.

While a registrar can change its trade name or get acquired, its underlying IANA ID stays tied to that specific accreditation. For a deeper look at how the system works, read our guide: The IANA ID: How a Small Number Explains the Registrar Behind a Domain.

Looking at registrar trade names alone makes the industry look like thousands of unrelated companies. Reading the underlying IANA IDs and their connections reveals four operational signals that brand names hide:

• Multi-ID Operators & Interfaces: A single operator can hold multiple ICANN accreditations at once. What looks like an obscure, standalone registrar in a WHOIS record is often an interface sitting under a major registrar account.
• Drop-Catching Shell Fleets: Because registry connection limits are allocated per accreditation, drop-catching services acquire batches of accredited registrars (and their IANA IDs) to multiply their bandwidth when chasing expiring domains.
• Name Persistence vs. Ownership Shifts: An IANA ID outlives rebrands, connecting a company's past name to its present one. Conversely, dormant accreditations are frequently bought and sold, meaning an old, low IANA ID can be repurposed by a new operator.
• Accreditation Lifecycle: An IANA ID is permanent, but accreditation is not. Checking whether an ID is currently accredited or terminated changes how you evaluate domains or abuse reports tied to it.

Enter either the registrar's name (supports partial and fuzzy matching) or the numeric IANA ID found in a domain's WHOIS record. Each result card displays the registrar's current accreditation status, official contact details (website, email, phone, and address), whether it is flagged as a drop-catching service, and, where detected, a direct link to the parent registrar it likely operates under.

No. ICANN accreditation and IANA registrar IDs govern generic top-level domains (gTLDs). Country-code extensions (.uk, .de, .jp, .ai, .io) are managed by their respective national registries under their own accreditation rules, though many major registrars sell both gTLDs and ccTLDs under the same storefront.