Bulk email domain age checker: which addresses are at brand-new domains?
In short: Paste email addresses and see how old each address's domain is from its registry record, with brand-new domains flagged. Limit: Reads the registry record for the domain, never the mailbox.
A bulk email domain age checker looks up when the domain behind each email address was registered, from its registry's RDAP record, and flags addresses at domains under 30 days or a year old. Paste up to 100 domains a run, or 500 after a free Google sign-in. Age says when a name was registered, not whether anyone reads mail there. It checks the domain, not the mailbox.
Price: this tool is free. Checking a whole email list is from $9/mo, and the first 100 checks are free with Google, no card. Check your list free nowSee pricing
Sample result
tom@globex.example is at a domain registered 12 days ago.
- Address
- tom@globex.example
- Registered
- 30 Oct 2026
- Age
- 12 days
What this means for you
A new domain has no history. It doesn't say anything about the mailbox.
- Registration date and registrar
- New domains flagged
- Unknown ages say why
- CSV out, nothing emailed
- RDAP
- Domain age
- CSV
By SimpleVerifier Team · Last updated
Got a list to screen for brand-new domains?
- Paste it above to see how old each address's domain is, with a CSV.
- Upload or paste it at /verify. Every address gets a live mailbox check, and the first 100 email checks are free with a Google sign-in, no card.
How do I check the age of the domains behind a list of email addresses?
- Paste email addresses, one per line, or upload a CSV. Addresses are found anywhere in the text.
- Press Check domain age. Only the unique domains are sent, 20 a request, and each is looked up at its registry. No mail is sent.
- Read each row: Under 30 days, 30 days to 1 year, 1 to 5 years, 5+ years or Age unknown, with the registration date and registrar.
- Filter to the new domains and download the CSV.
Example
- You enter
- Three addresses:
jane@acme.example(registered years ago),tom@globex.example(registered 12 days ago) andana@initech.example(a registry with no RDAP). - You get
- jane: 5+ years, with the registration date and registrar. tom: Under 30 days. ana: Age unknown, no RDAP for that ending. Download the CSV.
- Limits
- Up to 100 unique domains a run without an account and 500 when signed in with Google. 20 domains a request; one registry lookup per domain, shared with the bulk domain age checker.
Why look at the age of an email domain?
A domain registered last week has no history. Among signups and cold leads, brand-new domains are where throwaway and abusive addresses cluster, and where a real company is also just starting out. The age doesn't decide anything alone; it tells you which rows to look at first. See using domain age for lead scoring.
The date comes from the registry's RDAP record, the same lookup as the bulk domain age checker, so the limits are shared.
Where does the date come from, and when is there none?
The registry's RDAP service publishes the registration date. Some country registries publish no RDAP, and some records carry no date; those rows say Age unknown, with the reason. Age is read from the registrable domain, so mail.acme.co.uk is aged as acme.co.uk.
Domain age is not website age: a domain can be old and newly parked. See domain age is not website age.
What does an old domain not tell me?
Nothing about the mailbox. Gmail.com is decades old and its mailboxes close every day. The mailbox check asks the mail server about each address, and the hand-off below carries the same list there.
Who uses this tool, and for what?
- Product teams
- Look first at signups from domains registered in the last month.
- Sales teams
- Weigh a lead list's company domains by how long they've existed.
- Fraud and trust teams
- Triage a signup export by domain age.
- Agencies
- Add a domain-age column to a client list audit.
What can’t this tool tell you?
- Reads the registry record for the domain, never the mailbox.
- Some country registries publish no RDAP, so those domains show an unknown age.
- Age is read from the registrable domain, found by a common-ending rule.
- Up to 100 domains a run without an account, 500 signed in.
Common questions
- How do I check how old the domain of an email address is?
- Paste the addresses into a bulk email domain age checker like this one. It looks up each domain's registration date at its registry and shows its age.
- Is this bulk email domain age checker free?
- Yes. It is a free tool: up to 100 domains a run with no account, and up to 500 a run when you sign in with Google, with no card.
- Does domain age tell me whether the address is valid?
- No. It checks the domain, not the mailbox. Old domains have closed mailboxes and new ones have working ones.
- Why does a domain show Age unknown?
- Its country registry publishes no RDAP, the registry returned no record, or the record has no registration date.
- Where does the registration date come from?
- From the registry's RDAP record for the registrable domain, looked up live.
- Does it send an email to test?
- No. It reads the registry record only.
Sources
A tidy list can still be full of dead addresses.
Extracting, deduplicating and syntax checks all work on the text of an address. None of them can tell whether the mailbox exists. Only the server that hosts it can answer that, through an SMTP check, and that is what the paid product does.
- Upload the cleaned file as it is: CSVs up to 100,000 rows
- A real SMTP mailbox check on every row, with catch-all detection
- Small list? Starter at $9/mo covers 2,500 emails a month, cancel anytime
Plans from $9 a month, cancel anytime, no contract. Sign in with Google and your first 100 email checks are free, no card. The free tools stay free either way.