Site Checker Lab

Domain expiry checker

When a domain expires, how many days are left, and which registrar holds it, straight from the registry.

Public websites only. We keep the hostname and drop the rest.Registrar, registration and expiry dates, and days left.

How it works

We look up the domain in its registry's public RDAP service, the modern replacement for WHOIS.

  1. 1Find the registered domainFrom shop.example.co.uk we look up example.co.uk, using the public list of domain suffixes.
  2. 2Ask the registryIANA's list says which registry runs each extension. We ask that registry directly.
  3. 3Count the daysWarning under 30 days, danger under 7. If the registry doesn't answer, the result reads “Couldn't check”.

Worked example: a domain with auto-renew switched off

RegisteredSun 2 Mar 2014
ExpiresMon 7 Dec 2026
CheckedWed 11 Nov 2026, 26 days left
VerdictExpires soon. Renew now or switch auto-renew on

If it lapses, the website and every email address on the domain stop working.

Frequently asked questions

What happens when a domain expires?

The website and email stop working, usually within days. Most registries then hold the name in a grace period when only the owner can renew it, often at a higher price, before it is released.

Where does the expiry date come from?

From the registry's public RDAP record, the modern replacement for WHOIS. It is the same date your registrar works from.

Why can't you check some domains?

Some country-code registries don't publish RDAP, or don't answer in time. Then the result reads Couldn't check, which says nothing about the domain itself.

Why does the warning start at 30 days?

Registrars usually try to auto-renew in the last month. If fewer than 30 days are left, check that auto-renew is on and the payment card is current.

Does it work for subdomains?

Yes. A subdomain has no registration of its own, so we look up the domain it belongs to, for example example.co.uk for shop.example.co.uk.