Domain Age & WHOIS Checker
Check a domain's registration date, age, registrar, and expiry - domain age is a real deliverability signal.
Why domain age matters for cold email
Brand-new domains have no sending history, and receiving servers treat them with more suspicion. A domain registered days ago that suddenly starts sending outreach looks exactly like a throwaway spam domain - because that's usually what it is.
This tool reads registration data from RDAP (the modern WHOIS) and shows the registration date, approximate age, registrar, and expiry. Age isn't a magic threshold, but it's a real trust input, and pairing an older registration with a careful warmup gives a new sending domain the best possible start.
Age vs sending history
A subtle but important point: the registration date is not the same as sending reputation. An aged domain that has never sent email is treated much like a brand-new one the moment it starts, because there's no positive history attached to it.
So buying an old domain doesn't let you skip warmup. What age buys you is the absence of a red flag - a domain registered years ago is less obviously disposable than one registered last week - but the reputation itself still has to be earned through consistent, clean sending over two to four weeks.
Watch the expiry date
If a sending domain expires mid-campaign, you lose the identity and every bit of warmed-up reputation instantly, and any in-flight sequences break. Expired domains can also be snapped up by someone else, who then inherits your former sending identity.
Track the expiry this tool surfaces and renew well ahead of time - ideally set the domain to auto-renew. When you run a fleet of cold-email domains, a lapsed renewal is one of the most avoidable ways to lose weeks of warmup work.
Frequently asked questions
How old should a domain be before cold emailing?
There's no hard rule, but domains under 30 days old have no reputation and should be warmed up slowly. Older registrations look less disposable, but they still need a full warmup.
Does an old domain skip warmup?
No. Sending reputation comes from sending history, not registration date. An aged domain that has never sent is treated much like a new one, so warm it up regardless of age.
What is RDAP?
RDAP (Registration Data Access Protocol) is the modern, structured replacement for WHOIS. It returns registration, expiry, and registrar data in a machine-readable format, which is what this tool reads.
Why does domain expiry matter?
If a sending domain expires mid-campaign you lose the identity and any warmed-up reputation instantly, and someone else can register it. Track expiry and renew well ahead of time.
Can I see who owns a domain?
Registrant contact details are usually redacted for privacy (GDPR and registrar privacy services), so RDAP typically shows the registrar, dates, and status rather than a person's name.
Next steps
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