DNS Chronicle API retrieves any domain’s historical A and AAAA records

Perform a forward search for any FQDN to retrieve all of its historical A and AAAA records or a reverse DNS search for an IP address to obtain a list of all associated FQDNs.

Get started

500 free API credits. No credit card required.

50 Billion+Domains and subdomains
116 Billion+DNS records
60%+Cyber 150 in key categories trust us
52,000+Satisfied customers

Benefits

  • Flexible API queries

    DNS Chronicle API allows you to access past A and AAAA records for an FQDN, or retrieve a list of FQDNs historically associated with an IP address. This ability enables you to perform searches based on the data you currently have.

  • Easy to integrate

    Clear and comprehensive API documentation is available to facilitate your integration and usage of DNS Chronicle API. API results are provided in JSON or XML format, making it compatible with most systems.

  • Extensive high-quality data

    The API retrieves data from a market-leading historical DNS record database with billions of recorded events, allowing you to uncover the deep DNS history of any web property and its connections.

Ready to explore the full DNS timeline of a domain or an IP address?

Contact us

Practical Usage

  • Threat detection

    Identify unusual changes in domains’ DNS records, such as rapid IP address shifts, which may indicate malicious activity.

  • Attack surface discovery

    Discover outdated or previously unknown domains and subdomains linked to historical company IP addresses.

  • Threat actor monitoring

    Track the historical DNS activity of known malicious domain names to uncover links to threat actors and detect suspicious patterns.

  • Domain investigation

    Analyze the past IP address resolutions of domain names to support investigations into infrastructure and usage patterns.

Explore the insights of DNS Chronicle API with our passive DNS database

Our comprehensive database of historical DNS records contains information on billions of domains and subdomains, enabling users to gather all available DNS data points.

Request a Quote
DNS Chronicle API | WhoisXML API

Get 500 free API credits. No credit card required.

Get started

Trusted by
the smartest
companies

You may be interested

Registrant Alert
Registrant Alert

Find out which domains were added or dropped by registrants, with given search criteria.

Learn more
Subdomains Lookup
Subdomains Lookup

Discover subdomains related to the target domain name.

Learn more
IP Netblocks
IP Netblocks

Find out which IP range the particular IP belongs to.

Learn more
DNS Lookup Services
DNS Lookup Services

Identify who is hosting a particular domain name or website.

Learn more
WHOIS Search
WHOIS Search

Get well-parsed and normalized WHOIS information for any domain name, IP address or email.

Learn more
MAC Address API
MAC Address API

Get vendor information, detect virtual machines, manufacturer, location, read the information encoded in the MAC address.

Learn more
SSL Certificates Database
SSL Certificates Database

Get the most comprehensive database of SSL (Secure Sockets Layer) Certificates.

Learn more
Newly Registered Domains
Newly Registered Domains

Keep track of the best business opportunities online.

Learn more
Domain Availability
Domain Availability

The most accurate domain availability checker offered on the market.

Learn more
Reverse IP
Reverse IP

Find relations like ownership between hostnames and IPs.

Learn more
WHOIS Database Download
WHOIS Database Download

We provide complete and relevant domain WHOIS data which can be customized and easily integrated as per your business needs.

Learn more
Reverse DNS
Reverse DNS

Give the list of domain names tied to the specified DNS records via API calls with outputs in JSON and XML.

Learn more
Reverse WHOIS
Reverse WHOIS

Find connections between various domains, individuals and organizations.

Learn more
Domain Reputation API
Domain Reputation API

Assess the domain's or IP addresses reputation and risk profile with a simple score based on a comprehensive...

Learn more
IP Geolocation
IP Geolocation

Find out the exact physical location of any IP address, email or domain name.

Learn more
Reverse NS
Reverse NS

Find all domains that use the same name server.

Learn more
Reverse MX
Reverse MX

Reveal all the domains that use the same mail server.

Learn more
Brand Alert
Brand Alert

Monitor exact matches, variations and common misspellings of your brand name & trademarks.

Learn more
Threat Intelligence API
Threat Intelligence API

Easily identify malicious resources and retrieve their threat information.

Learn more
Domains & Subdomains Discovery API
Domains & Subdomains Discovery API

Find domains and subdomains related by specific terms in their hostnames.

Learn more
Website Categorization
Website Categorization

Define website category of the given domain.

Learn more
Screenshot Service
Screenshot Service

Instantly get a screenshot of any web page.

Learn more
SSL Certificates API
SSL Certificates API

Check a domain’s SSL certificate chain via API calls.

Learn more
Typosquatting Data Feed
Typosquatting Data Feed

Easily detect all typosquatting domain names as soon as they are registered each day.

Learn more
Real-time SSL Certificates Streaming
Real-time SSL Certificates Streaming

Get data feeds of SSL certificates along with their well parsed fields in real time. Accurate. Up-to-date.

Learn more
MAC Address Vendor Database
MAC Address Vendor Database

Get the most comprehensive database of registered MAC address blocks, also referred to as OUIs (Organizationally Unique Identifiers).

Learn more
Domain Registration Streaming
Domain Registration Streaming

Get data feeds of new registered domains along with their WHOIS data generated in real time.

Learn more
Email Verification
Email Verification

Ensure the validity and quality of any email address.

Learn more
Threat Intelligence Data Feeds
Threat Intelligence Data Feeds

Get the most relevant data to be ahead of emerging security threats.

Learn more
Domain Research Suite
Domain Research Suite

Enhance your domain research toolkit by our enterprise-grade web-based solution that helps you in searching...

Learn more
Newly Created Websites Data Feed
Newly Created Websites Data Feed

Get insights for the new business registered on the web.

Learn more