Domain Lookup - WHOIS/RDAP, DNS, SSL & Email Security

Check hundreds of domains in one run and get, for each one: registrar, creation and expiry dates, domain age (from RDAP, the official successor to WHOIS), DNS records, SPF and DMARC email security, the live SSL certificate with days left, and where the site redirects.

Why this one

• Official sources only. Registration data comes straight from each TLD registry's RDAP service (Verisign for .com, Nominet for .uk, and 1,200+ more), DNS from Cloudflare's resolver, SSL from the certificate the server actually presents. No scraped WHOIS sites.
• Everything in one row. Registration, DNS, email security, SSL and HTTP side by side, so you can sort by expiry, age, DMARC policy or certificate days left.
• Subdomains handled. docs.github.com is looked up as github.com.
• Availability hint. Domains with no registry record and no DNS are flagged likelyAvailable.
• Honest gaps. A few registries (for example .de and .io) don't publish RDAP data; those rows say so in registrationNote and still include DNS, SSL and HTTP.

Output

{
    "domain": "stripe.com",
    "registeredDomain": "stripe.com",
    "registrar": "SafeNames Ltd.",
    "createdAt": "1995-09-12T04:00:00Z",
    "expiresAt": "2027-09-11T04:00:00Z",
    "domainAgeDays": 11368,
    "daysUntilExpiry": 319,
    "status": ["client delete prohibited", "client transfer prohibited"],
    "nameservers": ["ns-1087.awsdns-07.org", "..."],
    "resolves": true,
    "ipv4": ["..."],
    "mx": ["aspmx.l.google.com", "..."],
    "spf": "v=spf1 include:_spf.google.com ...",
    "dmarc": "v=DMARC1; p=reject; ...",
    "dmarcPolicy": "reject",
    "ssl": { "issuer": "DigiCert, Inc.", "validTo": "2027-05-09T23:59:59.000Z", "daysLeft": 194, "trusted": true, "altNames": ["stripe.com", "www.stripe.com"] },
    "http": { "status": 200, "finalUrl": "https://stripe.com/", "server": "nginx", "redirected": false },
    "likelyAvailable": false
}

Use cases

• Portfolio and brand monitoring: catch expiring domains and certificates before they lapse.
• Security and IT audits: find domains missing SPF or DMARC, or with untrusted certificates.
• Sales and research: domain age and registrar as a signal about a company or site.
• Domain investing: check lists for likely-available names in bulk.

Pricing

Pay per domain looked up. See the Pricing tab. Invalid inputs are free.

Good to know

• RDAP shows registrant contact details only where the registry publishes them; most redact personal data, and this Actor does not collect registrant contacts.
• likelyAvailable is a strong hint, not a guarantee; confirm with a registrar before buying.

Feedback

Want another check (for example blacklist status)? Open an issue on the Issues tab.

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