
Find all domains
that use the same name server
1,246,759,978
Domains and subdomains
Domains and subdomains
1,376,145
NS records updated daily
NS records updated daily
1,182
Satisfied customers
Satisfied customers
Enterprise API Package
API access through WhoisXMLAPI can be purchased as an annual subscription. The access pricing is based on the number of queries, which is measured monthly with per-minute rate limits. The pricing structure gives predictability to business planning and solution architecture.
Learn more
Trusted by
the smartest
companies












Code samples for the major languages
Give the API a Try
Input correct name server address
Try Reverse NS API for free
Have questions?
support@whoisxmlapi.com
We will get back to you within a day.
WHOIS API, Inc.
California
USA