Domain agechecker.
Check when a domain was registered, its registrar and when it expires, from the registry's public record, before you send from it or to it.
How it works
- Enter a domainYours or a prospect's
- See its ageRegistered, expires, registrar
- Plan accordinglyNew domains need warm-up
Free, no sign-up. Checked live from our server. Nothing is stored.
The tool
Look up a domain's age
From the registry's public record (RDAP), the modern replacement for WHOIS.
Why domain age matters.
What the result means, and how to fix what it finds.
New domains start with no reputation
Inbox providers trust domains with a history of good email. A domain registered last week has none, and sending a lot of email from it quickly looks like a spammer setting up shop. That's why new cold email domains need their mailboxes warmed up for a couple of weeks before campaigns start.
Older isn't automatically better
A domain's age helps, but its past matters more. An old domain bought second-hand may carry a spammer's reputation. Check any second-hand domain on blocklists and look at what it used to host before you use it for email.
Checking prospects
A company domain registered a few days ago can be a brand-new business, or a trap set up to catch spammers. It's worth a look before you add a fresh domain's addresses to a campaign.
Watch the expiry date
If your sending domain expires, your mailboxes stop working and the domain can be bought by someone else. Turn on auto-renew with your registrar, and check that the payment card on file is current.
Choosing a sending domain
A good cold email domain looks like your brand, so people recognise it and filters see a normal business. Common patterns are your brand name with a short word added, such as getbrand.com, trybrand.com or brandhq.com. Stick to .com where you can: some newer endings are linked with spam and filtered harder. Avoid hyphens and numbers, which look throwaway. Point each domain's website to your main site, so anyone who checks it lands somewhere real. Register them with privacy protection and auto-renew on, so the details stay private and the domain never lapses mid-campaign. And buy them a few weeks before you need them, so warm-up can start while the rest of the campaign is prepared. Two or three domains are a sensible start for most senders.
In mailzy
A .com for cold email, set up for you.
Buy a domain through mailzy when you order mailboxes. We reserve it, set it up within 24 hours, and warm up its mailboxes.
Questions before you start.
Ask us on the chat if yours isn't here. A real person answers.
What is RDAP?
The modern, structured replacement for WHOIS. Registries publish the same public facts through it: dates, registrar and name servers.
Why is the owner not shown?
Most registrars hide owners' personal details for privacy. The dates and registrar are public.
How old should a sending domain be?
Age matters less than warm-up. Warm new mailboxes for at least two weeks before sending campaigns.
More free tools.
Email Validator
Check syntax, mail servers, disposable and role addresses, and catch-all likelihood, for up to 100 addresses.
Open the toolEmail Permutator
Generate the likely addresses for a person from their name and company domain, ready to verify.
Open the toolCSV List Cleaner
Remove duplicates, trim spaces and fix capitals in a lead CSV, entirely in your browser.
Open the toolEverything for cold email, in one place.
Start free for 14 days. No card needed.