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Domain Lookup

Retrieve domain name details and detect potentially malicious or dangerous domains.

This API can be used directly as a domain or URL blocklist and is also good for reputation or risk analysis tasks.

Some of the API features include:

End Point

Test API
API Request
hostyesstringA domain name, hostname, FQDN, URL, HTML link or email address to lookup
livenobooleantrueFor domains that we have never seen before then perform various live checks and realtime reconnaissance.
NOTE: this option may add additional non-deterministic delay to the request, if you require consistently fast API response times or just want to check our domain blocklists then you can disable this option
API Response
validbooleanTrue if a valid domain was found. For a domain to be considered valid it must be registered and have valid DNS NS records
fqdnstringThe fully qualified domain name (FQDN)
domainstringThe primary domain name excluding any subdomains. This is also referred to as the second-level domain (SLD)
is-subdomainbooleanIs the FQDN a subdomain of the primary domain
tldstringThe top-level domain (TLD)
tld-ccstringFor a country code top-level domain (ccTLD) this will contain the associated ISO 2-letter country code
rankintegerThe domains estimated global traffic rank with the highest rank being 1. A value of 0 indicates the domain is currently ranked outside of the top 1M of domains
is-govbooleanIs this domain under a government or military TLD
is-opennicbooleanIs this domain under an OpenNIC TLD
is-pendingbooleanTrue if this domain is unseen and is currently being processed in the background. This field only matters when the 'live' lookup setting has been explicitly disabled and indicates that not all domain data my be present yet
is-adultbooleanThis domain is hosting adult content such as porn, webcams, escorts, etc
is-maliciousbooleanConsider this domain malicious as it is currently listed on at least 1 blocklist
blocklistsarrayAn array of strings indicating which blocklist categories this domain is listed on. Current categories are: phishing, malware, spam, anonymizer, nefarious
sensorsarrayAn array of objects containing details on which specific blocklist sensors have detected this domain:
idintegerThe sensor ID. This is a permanent and unique ID for each sensor
blockliststringThe primary blocklist category this sensor belongs to
descriptionstringContains details about the sensor source and what type of malicious activity was detected
registered-datestringThe ISO date this domain was registered or first seen on the internet. An empty value indicates we could not reliably determine the date
ageintegerThe number of days since the domain was registered. A domain age of under 90 days is generally considered to be potentially risky. A value of 0 indicates no registration date was found for this domain
registrar-namestringThe name of the domain registrar owning this domain
registrar-idintegerThe IANA registrar ID (0 if no registrar ID was found)
dns-providerstringThe primary domain of the DNS provider for this domain
mail-providerstringThe primary domain of the email provider for this domain. An empty value indicates the domain has no valid MX records
API Performance
Avg Latency20msAverage RTT for requests within the same data center/region
Max Rate10/secondMaximum inbound request rate. Exceeding this will result in request throttling
Max Concurrency250Maximum concurrent/simultaneous requests. Exceeding this will result in error code 06 [TOO MANY CONNECTIONS]

API Example
curl https://neutrinoapi.net/domain-lookup \ --header "User-ID: <your-user-id>" \ --header "API-Key: <your-api-key>" \ --data-urlencode "host=neutrinoapi.com" \ --data-urlencode "live=true"
{ age: 3796, blocklists: [], dns-provider: "constellix.com", domain: "neutrinoapi.com", fqdn: "neutrinoapi.com", is-adult: false, is-gov: false, is-malicious: false, is-opennic: false, is-pending: false, is-subdomain: false, mail-provider: "isx.net.nz", rank: 746021, registered-date: "2013-09-15", registrar-id: 468, registrar-name: "Amazon Registrar, Inc.", sensors: [], tld: "com", tld-cc: "", valid: true }