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A domain age checker measures the time since a domain’s registry creation date. That tells you when the name was first registered. It does not tell you when a website first went live, and it does not prove the name was held continuously since then. To answer those questions you need a second source, usually the Internet Archive’s Wayback Machine, and sometimes historical registration records.
Three different “ages” people mix up
- Domain age: time elapsed since the registry-recorded creation date.
- Website history: when content first appeared at the domain. Archived snapshots give dated observations, not proof of launch.
- Content age: when the material you are reading was published or last substantially changed. It can be much younger than the domain or earlier versions of the site.
Many tools label their output “website age” loosely, so check which field and source the tool actually uses. A name can sit parked for years before a site is published. An archive snapshot only shows that the archive captured content by that date, so the site may be older than the earliest capture. Neither record shows uninterrupted operation. (SEO.Domains website-age guide, 26 June 2026; this is a commercial source, so treat its methodology as secondary context rather than an official standard.)
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How to check a domain’s age, step by step
- Decide what you are checking. Is it the root domain, a subdomain, or a single page? Registration dates exist only for the registered domain.
- Look up the registration record. For generic TLDs such as .com, .org or .net, use ICANN Lookup. For other TLDs, or when ICANN Lookup lacks the data, use the relevant registry’s or registrar’s registration-data service.
- Find the creation date. Take the creation or registration-event date. Do not confuse it with the updated, expiration, transfer or current-term dates.
- Check the website history if needed. Search the host or URL in the Internet Archive’s Wayback Machine. Record the earliest snapshot as an archival observation, not as the true launch date.
- Cross-check if money is involved. If you are buying the domain, compare the creation date with historical registration records. Investigate any gaps or conflicts (domain-age verification guide, 4 June 2026).
Why ICANN Lookup is the right starting point for gTLDs
ICANN’s announcement of 27 January 2025 states: “As of 28 January 2025, the Registration Data Access Protocol (RDAP) will be the definitive source for delivering generic top-level domain name (gTLD) registration information in place of sunsetted WHOIS services.” (ICANN announcement).
ICANN describes RDAP as a protocol that returns WHOIS-like registration data in standardized query and response formats. All gTLD registries and registrars must provide RDAP under the gTLD RDAP Profile. Most are no longer required to provide WHOIS, with .com, .name and .post named as exceptions (ICANN RDAP overview).
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According to the ICANN Lookup FAQ, the tool queries RDAP and shows the available registration dates, including creation, expiration and update dates. The result also identifies the authoritative server, which helps you see where the data came from. Where RDAP lacks the relevant information, the tool may fall back to WHOIS for that gTLD registry. Country-code TLDs and other registries can follow different rules and show different data.
Why one lookup is not always enough
Registration data can be inconsistent
A 2024 study, WHOIS Right? An Analysis of WHOIS and RDAP Consistency, compared 164 million records for a sample of 55 million domain names. It found inconsistencies in important fields, including creation dates and nameservers, for 7.6% of observed domains. That figure is specific to the study. It does not mean 7.6% of all current lookups are wrong.
Dating web resources is an evidence problem
A 2013 paper evaluated a date-estimation tool on 1,200 URIs whose creation dates had been manually verified. The tool produced an estimate for 75.90% of resources, and 32.78% of them had the correct value (paper). The study is old and applies to its own method and dataset. It still shows why a single signal should not be treated as the answer.
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| Source | What it measures | Main limit |
|---|---|---|
| Registry / RDAP creation date | When the registry recorded the domain’s creation | Says nothing about site content; rules and data differ by TLD |
| Wayback Machine snapshots | When the archive observed content | Coverage gaps; the site may predate the first capture; continuity is not proven |
| Historical registration records | Changes in registration over time | Coverage varies by provider |
Compare what each source measures, whether it is authoritative for that TLD, which date label it shows, and whether the records show continuity. For a purchase, the reason for a discrepancy matters more than picking the largest age on display. A mismatch may come from a change in what is being measured, incomplete archive coverage, or a record problem.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Common questions about domain age
Is website age the same as domain age?
No. Domain age starts at registration. Website age starts when content appears, which may be later.
Does transferring a domain to a new registrar reset its age?
The sources gathered here do not address this directly, so confirm it in the registration record. Check that the creation date, not the update or transfer date, is the field you are reading.
Does domain age help SEO?
The sources reviewed do not establish a causal ranking benefit from domain age, and no official search-engine statement was found. Do not infer authority, safety or business continuity from a creation date alone.
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