Worked examples for Reverse NS: the domains whose DNS NS record names a name server. One example per parameter value (apex, include_subdomains), then paging and ordering. The name servers are Cloudflare’s may.ns.cloudflare.com (a shared name server of a large DNS provider) and Google’s ns1.google.com (used by Google’s own domains).

Every example is a real request with the response the API returned on September 24, 2026 (Deepinfo DEMO account); totals such as result_count change as the dataset is updated.

Responses are trimmed for display: results shows the first 3 records, long lists inside a record the first 10 items and very long texts the first 4,000 characters, while result_count stays the full total; each page says what was shortened. Personal data (WHOIS contact names, addresses, phone numbers and personal e-mail addresses) is redacted, and cookie values are masked (<value>).

Unless an example shows paging, it asks for page_size=25. page is 1 to 400 and page_size 25 to 100 (the API default is 100).

Each result is a full domain record, the same shape as a Domain Detail response: WHOIS, DNS, SSL certificate and web data.

After the examples: Ordering Values · Parameters Without an Example

Endpoint
Reverse NS

Lookups

ExampleParamValue
Domains Using One Name Servernsmay.ns.cloudflare.com
Domains on Google Name Serversnsns1.google.com

Options

ExampleParamValue
Any Name Server Under the Same Domainapex
ns
true
may.ns.cloudflare.com
Including Subdomainsinclude_subdomains
ordering
ns
true
-punycode
ns1.google.com

Paging

ExampleParamValue
Second Page of Resultspage
ns
2
may.ns.cloudflare.com
Larger Pages (100 Results)page_size
ns
100
may.ns.cloudflare.com

Ordering

ExampleParamValue
Most Recent WHOIS Update Firstordering
ns
-domain.whois.update_date
ns1.google.com

Ordering Values

ordering sorts the results by one field, ascending; a leading - sorts descending (-domain.whois.create_date puts the newest registration first). Each value below was tried on the live API on September 24, 2026, on one of the Discovery endpoints, and sorted the results as described. Without ordering, the order is not fixed: the same request can return its records in a different order.

Value Sorts By
punycode The domain name, in its ASCII (punycode) form
domain.extension.punycode The extension (TLD)
dns_last_change_date The last change seen in the DNS records
ssl_last_change_date The last change seen in the SSL certificate
domain.whois_last_change_date The last change seen in the WHOIS record
domain.whois.create_date The registration date
domain.whois.expiry_date The expiry date
domain.whois.update_date The date the registry last updated the WHOIS record

Parameters Without an Example

As of September 24, 2026, these parameters have no worked example.

Parameter Why
export export=true returns the whole result set as a file download (JSON or CSV) instead of a page of results; these examples show paged JSON only.
export_format Used only with export=true: json (the default) or csv.
export_scope Used only with export=true: basic, default or extended (how many fields each exported record carries).

Reference updated