ネットワーク情報を解析中...

IP Address & Domain Lookup Tool🔍 Check-Net Pro

My IP
Recent Searches ?
🌐

Ready to Analyze

Please enter a domain or IP address above to begin.

Features

🚀

Fast & Multi-faceted

Instantly retrieves and diagnoses DNS, SSL, headers, and location data.

🛡️

Visualized Security

Diagnoses complex settings with a unique scoring system to identify improvements.

📋

History & Export

Quickly access past history and export reports easily with the PDF/Print function.

Analyzable Data Items

This IP address and domain lookup tool automatically retrieves network information, DNS records, and security settings from the entered domain name or IP address and presents them as a structured report. It can also be used by website owners and network administrators for investigation and troubleshooting.

Checking DNS records (A, AAAA, MX, NS, TXT, CNAME) for domain configuration analysis
Estimating IP geolocation such as country, city, and postal code
Verifying SSL/TLS certificate issuer and expiration for HTTPS configuration
Measuring server response time and support for modern protocols such as HTTP/3
Analyzing security headers including HSTS, CSP, XFO, and SPF settings
Checking major DNSBL blacklist databases for spam or abuse listings
Identifying hostnames via reverse DNS (PTR records) and web server information
Looking up ISP, organization, and ASN network infrastructure details

How to use

  • 1Enter the domain or IP address you want to investigate in the search box.
  • 2Click "Analyze" to see the latest or cached information.
  • 3Use the "PDF Save / Print" button to export the analysis report.

FAQ

Why am I seeing cached data?
Data is cached for 1 hour to reduce API load and improve speed. Use "Update Now" for the latest DNS changes.
Can I click the update button repeatedly?
No. To prevent excessive load on our servers and external APIs, there is a limit on the number of requests within a short period. Repeatedly updating may result in a temporary block.
How accurate is the location data?
It is an estimate at the city level based on the IP address. It does not pinpoint a specific address.
Where is history data stored?
History is saved only in your browser (LocalStorage). It is not sent to the server.
How is the Security Score calculated?
It is calculated on a 100-point scale based on the implementation of SSL, HSTS, CSP, SPF, and other key security headers.
Will my search query be made public?
No. Your queries and results are not listed publicly. History data is stored only within your own browser.
What should I do if the blacklist check shows a "Warning"?
A warning indicates the IP may have been flagged for spam or unauthorized activity in the past. If you are using a shared server or dynamic IP, this can happen without your direct involvement. If your normal browsing is unaffected, immediate action is usually not required.
What can be determined from an IP address?
From an IP address, you can identify the Internet service provider (ISP), approximate geographic location such as country or region, and the network organization (ASN). However, it cannot reveal a person’s exact address, name, or other personal information.
What is a DNS record?
DNS records are configuration entries that link a domain name to servers and services on the Internet. For example, an A record maps a domain to an IP address, while an MX record specifies the mail server responsible for receiving email for the domain.
What is an IP address lookup tool used for?
An IP address lookup tool is used for network investigation, DNS configuration checks, security analysis, and access log analysis. It is useful not only for server administrators and security professionals but also for website owners.

disclaimer

The information provided by this tool is based on external APIs and public DNS records. We do not guarantee the accuracy of geolocation or the completeness of the data. The administrator shall not be held liable for any damages arising from the use of this tool.

Share