⏳ 域名年龄查询（批量）Domain Age Checker
批量查询域名的注册时间和年龄：通过公共 RDAP 注册数据接口获取创建日期、到期日期和注册商，自动计算已注册多少年、多少天以及距离到期还有多久，一次最多 20 个域名。Check how old domains are, in bulk: creation date, expiry date and registrar come from the public RDAP registration-data service, and the tool works out the age in years and days and the time left until expiry — up to 20 domains at once.
使用说明与常见问题How-to & FAQ
「域名年龄查询（批量）」是什么？What is the Domain Age Checker tool?
批量查询域名的注册时间和年龄：通过公共 RDAP 注册数据接口获取创建日期、到期日期和注册商，自动计算已注册多少年、多少天以及距离到期还有多久，一次最多 20 个域名。Check how old domains are, in bulk: creation date, expiry date and registrar come from the public RDAP registration-data service, and the tool works out the age in years and days and the time left until expiry — up to 20 domains at once.
如何使用「域名年龄查询（批量）」？How do I use the Domain Age Checker tool?
在「域名年龄查询（批量）」中，点击「查询」、「复制结果（CSV）」按钮即可。In the Domain Age Checker: Click "Check", "Copy results (CSV)".
域名年龄是怎么算的？How is domain age calculated?
从注册局记录的首次注册日期（RDAP 中的 registration 事件）算到今天，按日历显示为“几年几个月几天”，并给出总天数。如果域名曾经过期被删除后又被别人重新注册，注册日期会从新注册那天算起。From the registry's original registration date (the RDAP registration event) to today, shown as calendar years, months and days plus a total day count. If a domain expired, was deleted and was later registered again, the age starts from the new registration.
数据从哪里来？Where does the data come from?
通过 rdap.org 把请求转发到各域名后缀的官方 RDAP 服务（RDAP 是 ICANN 要求的 WHOIS 替代协议）。查询直接从你的浏览器发出，只会把域名发送给 RDAP 服务。Requests go through rdap.org to each TLD's official RDAP server (RDAP is the ICANN-mandated successor to WHOIS). Lookups are sent straight from your browser, and only the domain name is shared with the RDAP service.
为什么有的域名查不到？Why do some domains fail?
部分国家和地区后缀（例如 .cn、.de 的部分数据）没有提供公开 RDAP 服务，或出于隐私不公开注册日期；也可能是域名尚未注册，或短时间内查询过多被限流。Some country-code TLDs offer no public RDAP service or withhold the registration date for privacy; the domain may also be unregistered, or you may be rate-limited after many lookups.
域名年龄对 SEO 有影响吗？Does domain age matter for SEO?
Google 表示域名年龄本身不是排名因素；老域名排名好通常是因为积累了更多内容和外链。查看域名年龄更常用于评估网站可信度、判断钓鱼网站（新注册的域名风险更高）和购买二手域名。Google says domain age itself is not a ranking factor; older domains often rank well because they have built up content and links. Age is more useful for judging trustworthiness, spotting phishing (newly registered domains are riskier) and evaluating domains you might buy.
「域名年龄查询（批量）」免费吗？需要注册吗？Is the Domain Age Checker free? Do I need an account?
「域名年龄查询（批量）」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；查询时会联网访问你指定的地址或服务（详见下方说明），本站服务器不会收集你的输入。The Domain Age Checker is completely free with no sign-up or install and works on phones and desktops; it connects to the address or service you specify when you run it (see below); this site's servers never collect your input.