DocumentCloud

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1. 
   Instya

   Instya is an eCommerce search engine and shopping engine for searching products and websites. It offers two options: searching alternatives for various eCommerce sites, and in-depth product lists across various categories. Its website analysis provides information on search engine, domain, server and page speed statistics. The site also publishes buying guides and curated product lists, which can be filtered or sorted, and offers metrics and data related to products.

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2. 
   CRT Certificate Search

   CRT Certificate Search, known as crt.sh, is a free certificate transparency log search tool from Sectigo, formerly Comodo CA. It accepts an identity such as a domain name or organization name, a certificate fingerprint in SHA-1 or SHA-256 form, or a crt.sh ID as search input. The tool is provided by Sectigo Limited.

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3. 
   CertKit Certificate Search

   CertKit Certificate Search is a tool that searches TLS certificate transparency logs to locate publicly issued certificates. It can identify new subdomains, certificate renewals, and suspicious activity, supporting security monitoring, domain research, and uncovering hidden infrastructure.

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4. 
   BGP.tools

   bgp.tools provides BGP debugging and insight into internet routing, with searching by ASN, prefix, DNS name or MAC address. Paid monitoring plans cover BGP network monitoring and IRR and RPKI monitoring.

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5. 
   Cisco Talos Intelligence

   Cisco Talos Intelligence operates an IP and Domain Intelligence Center for real-time threat detection. It publishes threat data including daily volume and volume change metrics for top email and spam sending countries. The service also accepts incident response inquiries for emergency network security needs.

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6. 
   packet.guru

   packet.guru is a public website offering browser privacy and network diagnostic tools. It checks user IP and location, provides Privacy and Trust scores, free DNS, WebRTC and browser-fingerprint leak tests, plus 25 network tools. The tool suite is organized into Network, DNS, WEB and Utility categories for professional use, with tools including ping, traceroute, whois, DNS lookup, URL encoder/decoder, HTTP header checks and base64 encode/decode functions.

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