Internet Device Search Engine

Shodan

Shodan is a search engine for internet-connected devices and services, used to inspect public exposure, banners, ports, software metadata, vulnerabilities, and network-facing infrastructure.

Official site

shodan.io is the main public website for Shodan.

Core use

Shodan helps users search internet-facing devices and services by banners, ports, products, countries, organizations, hostnames, and other metadata.

Primary audience

Security teams, researchers, developers, network operators, and risk analysts use Shodan to understand exposed infrastructure and internet-wide technology patterns.

Shodan indexes internet-connected devices and services so users can search public exposure, banners, ports, and infrastructure metadata.View logo on Wikimedia Commons

What Shodan is

Shodan official site is an internet device search engine. Instead of indexing web pages the way a general search engine does, Shodan indexes public information from internet-connected services, such as banners, open ports, host metadata, certificates, and related network details.

Internet-facing devices

Shodan is built around the idea that the public internet contains far more than websites. Routers, cameras, databases, industrial systems, cloud servers, remote-access tools, storage services, and many other systems may expose network services. Shodan helps make that exposure searchable, which is useful for defenders and risky when misunderstood.

Banners and metadata

The Shodan help center describes banners as metadata returned by software running on a device. A banner can reveal a product name, version, service type, welcome message, protocol detail, certificate, or configuration clue. Those details are not the same as exploitation, but they can help someone understand what is publicly visible.

Search query syntax

Shodan searches are structured rather than purely conversational. Users can narrow results by fields such as service, location, organization, product, hostname, port, and other properties. That makes the site useful for focused research, but it also means responsible use requires understanding the query syntax and the legal boundaries around probing systems.

Monitoring and APIs

Beyond the website, Shodan offers developer and monitoring workflows. Security teams can use APIs, alerts, and network monitoring features to track internet-facing assets, enrich investigations, and notice when unexpected services appear. These workflows are most valuable when tied to assets the user owns or is authorized to assess.

Who uses Shodan

Shodan is used by network defenders, vulnerability managers, incident responders, researchers, journalists, market analysts, students, and developers. A company may use it to check its own public attack surface, while a researcher may use aggregate results to study technology adoption or risky exposure patterns.

Safety and ethics

Shodan can reveal sensitive-looking information, but visibility is not permission. Responsible use means staying within authorization, avoiding intrusive testing against systems you do not own, reporting serious exposures through appropriate channels, and treating results as leads that need careful verification rather than proof of compromise.

Why it matters

Public exposure is one of the easiest security risks to overlook. A forgotten database, outdated VPN gateway, exposed camera, or misconfigured cloud service can sit online for months. Shodan matters because it makes that exposure visible and searchable, helping defenders see their internet footprint before attackers do.

WHOIS domain data

Data pulled: May 23, 2026View current WHOIS record

Domain: shodan.io
IP address: 104.18.13.238
Registrar: Gandi SAS
WHOIS server: whois.gandi.net
Referral URL: https://www.gandi.net
Created: August 22, 2012
Updated: July 27, 2025
Expires: August 22, 2026
Nameservers: ed.ns.cloudflare.com (108.162.193.111); lady.ns.cloudflare.com (172.64.32.127)
Domain status: ok https://icann.org/epp#ok
Contact privacy: Registrant contact name and address are redacted; the organization field lists John Matherly.

Key concepts

Internet-facing asseta device, service, or system reachable from the public internet.
Bannermetadata returned by a network service before or during a connection.
Attack surfacethe externally reachable systems and services that could be targeted or misconfigured.
Passive discoverylearning about exposure from indexed data rather than actively testing a system yourself.

Website features

Search for public device and service metadata across the internet.
Filter results by port, product, organization, country, hostname, certificate, and other fields.
Inspect host pages that summarize exposed services and associated metadata.
Use APIs and monitoring workflows to track authorized assets and enrich security investigations.

Common misconceptions

Finding a system in Shodan does not mean it has been hacked; it means it is visible or has visible service metadata.
A listed vulnerability or product version is a lead, not a complete risk assessment by itself.
Shodan is not only for attackers; defenders use it to find and reduce their own public exposure.
Search results do not grant permission to log in, scan aggressively, exploit, or disrupt systems.

Open questions

How can device search engines help defenders without making accidental exposure easier to abuse?
What should cloud providers and vendors do when common misconfigurations become searchable at internet scale?
How should organizations combine Shodan-style external visibility with internal asset inventories?
Will connected devices become easier to secure as public exposure data becomes more widely understood?