Network and Infrastructure

This section covers the IP, network, and web infrastructure side of the DNS Toolkit.

Common infrastructure endpoints

Endpoint Purpose
GET /v1/reverse PTR / reverse DNS lookup for an IP
GET /v1/asn ASN, network prefix, organization, and location
GET /v1/blacklist DNSBL and reputation checks
GET /v1/ports Check common open ports
GET /v1/tech-stack Detect web stack and server signals
GET /v1/redirects Follow an HTTP redirect chain

Python SDK examples

Reverse DNS lookup

from toolkitapi import DNS

with DNS(api_key="tk_...") as dns:
    result = dns.reverse("8.8.8.8")
    print(result)

ASN and provider details

from toolkitapi import DNS

with DNS(api_key="tk_...") as dns:
    result = dns.asn("1.1.1.1")
    print(result)

Blacklist check

from toolkitapi import DNS

with DNS(api_key="tk_...") as dns:
    result = dns.blacklist("8.8.8.8")
    print(result)

Scan common ports

from toolkitapi import DNS

with DNS(api_key="tk_...") as dns:
    result = dns.ports("toolkitapi.io")
    print(result)

Detect the technology stack

from toolkitapi import DNS

with DNS(api_key="tk_...") as dns:
    result = dns.tech_stack("github.com")
    print(result)

Trace redirects

from toolkitapi import DNS

with DNS(api_key="tk_...") as dns:
    result = dns.redirects("http://github.com")
    print(result)

What these endpoints return

These infrastructure endpoints help turn a hostname or IP into something operationally useful:

  • reverse and asn enrich an IP with PTR, ASN, organization, and location data
  • ports checks a practical set of common TCP services rather than every port on the host
  • tech_stack extracts server headers, technologies, and missing security headers
  • redirects explains where a URL ultimately lands and how it got there

What these endpoints return

These infrastructure endpoints help turn a hostname or IP into something operationally useful:

  • reverse and asn enrich an IP with PTR, ASN, organization, and location data
  • ports checks a practical set of common TCP services rather than every port on the host
  • tech_stack extracts server headers, technologies, and missing security headers
  • redirects explains where a URL ultimately lands and how it got there

Jump straight to live tools

  • https://dns.toolkitapi.io/tools/reverse/
  • https://dns.toolkitapi.io/tools/asn/
  • https://dns.toolkitapi.io/tools/blacklist/
  • https://dns.toolkitapi.io/tools/ports/
  • https://dns.toolkitapi.io/tools/tech-stack/
  • https://dns.toolkitapi.io/tools/redirects/

Good use cases

  • security and asset inventory checks
  • infrastructure enrichment in internal tools
  • email sender reputation review
  • redirect validation during migrations