US Domain WHOIS Lookup

What is a .us domain?

.us is the country code top-level domain (ccTLD) for the United States, operated under the U.S. Department of Commerce and managed by Registry Services, LLC. It's open to U.S. citizens, residents, businesses, and organizations with a real connection to the United States — making it ideal for U.S.-focused brands, government adjacent projects, local services, and personal sites.

How our US domain WHOIS lookup works

When you submit a domain, this tool queries the authoritative RDAP (Registration Data Access Protocol) server for the .us registry — the modern, structured replacement for the legacy WHOIS protocol. In parallel, we run live DNS lookups (A, AAAA, MX, TXT, NS, CNAME) against Cloudflare's resolver and probe the domain's HTTPS endpoint to verify SSL and uptime. All results return in a single JSON payload, typically in under a second.

WHOIS vs DNS lookup — what's the difference?

• WHOIS answers who owns this domain. It returns the registrar, registration and expiry dates, status codes, name servers and (when public) registrant contact details.
• DNS lookup answers where does this domain point. It returns the technical records that route traffic — A and AAAA for IP addresses, MX for email, NS for delegation, TXT for verification (SPF, DKIM, DMARC), CNAME for aliases.
• This tool runs both in a single click so you get the full picture: ownership and infrastructure.

Free .us WHOIS search — what you get

• Domain availability detection (available, registered, expired)
• Registrar, IANA ID, registration / expiry / update dates
• EPP status codes (clientTransferProhibited, serverHold, etc.)
• Name servers and DNSSEC signing status
• Registrant organization, state and country (when not redacted)
• Abuse contact email and phone for reporting issues
• Live A, AAAA, MX, TXT, NS and CNAME records
• SSL certificate, HTTPS reachability and HTTP status
• Export results as JSON, CSV or PDF
• Free public API — GET /api/whois?domain=example.us

Developer API

Need WHOIS data in your own app? Hit our endpoint directly:

GET https://whitescreen.info/api/whois?domain=example.us
Accept: application/json

# Response (truncated)
{
  "domain": "example.us",
  "availability": "registered",
  "whois": { "registrar": "...", "expirationDate": "...", "nameservers": [...] },
  "dns":   { "A": [...], "MX": [...], "TXT": [...] },
  "health":{ "httpsReachable": true, "sslValid": true }
}

CORS-enabled. Cached 5 minutes per domain. Please be courteous with request volume.

Frequently asked questions