rDNS: reverse DNS lookups - powered by Segfault, Domainsproject and CertStream-Domains

 Simple Lookup:

 curl https://ip.thc.org/1.1.1.1

 Note:
 - f : specify a apex domain filter. ex:  curl https://ip.thc.org/1.1.1.1?f=abc.com
 - l : specify the number of results to return (max 100). ex: curl https://ip.thc.org/1.1.1.1?l=70

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 IP Block Lookup:
 /24, /16 and /8 blocks can be looked up

 curl https://ip.thc.org/api/v1/lookup -X POST -d' { "ip_address":"1.1.1.0/24", "limit": 10 }'  -s

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 Filtered Lookup:
 Note:
 - tld : arrays of tld's to filter. ex: {"tld":["com","de"]}
 - apex_domain: filter results by a single apex_domain. ex: {"apex_domain":"google.com"}
 - page_state - used to navigate to next page, place page_state received from the previous page here.
 - tld and apex_domain filters cannot be used for ip-block lookups.

 curl https://ip.thc.org/api/v1/lookup -X POST -d' { "ip_address":"1.1.1.1", "limit": 10 }'  -s

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 CNAME Lookup:
 Find all domains pointing to a given target_domain
 Note:
 - apex_domain - used to filter result based on the apex domain.
 - page_state - used to navigate to next page, place page_state received from the previous page here.

 curl https://ip.thc.org/api/v1/lookup/cnames -X POST -d' { "target_domain":"google.com",  "limit": 10 }'  -s

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 Subdomain Lookup:
 Find all subdomains of a given domain
 Note:
 - page_state - used to navigate to next page, place page_state received from the previous page here.
 
 curl https://ip.thc.org/api/v1/lookup/subdomains -X POST -d' { "domain":"thc.org", "limit": 10 }'  -s

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 RDNS - CSV Download:
 Note:
 - hide_header -  when set to true hides csv column names.
 - apex_domain  - can be used to filter downloads by apex domain.
 - tld -  can be used to filter downloads by tld.
 - limit - limit number of results returned (max: 50000).

 curl 'https://ip.thc.org/api/v1/download?ip_address=1.1.1.1&limit=500&hide_header=true' -o results.csv

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 Subdomains - CSV Download:
 Note:
 - hide_header -  when set to true hides csv column names.
 - apex_domain  - can be used to filter downloads by apex domain.
 - limit - limit number of results returned (max: 50000).

 curl 'https://ip.thc.org/api/v1/subdomains/download?domain=thc.org&limit=500&hide_header=true' -o results.csv

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 CNAME - CSV Download:
 Note:
 - hide_header -  when set to true hides csv column names.
 - apex_domain  - can be used to filter downloads by apex domain.
 - limit - limit number of results returned (max: 50000).

 curl 'https://ip.thc.org/api/v1/cnames/download?target_domain=google.com&limit=500&hide_header=true' -o results.csv