IP Reverse Lookup
Free online IP reverse lookup tool that uses reverse DNS (PTR) records to find domains associated with an IP address. Enter an IPv4 or IPv6 address to view P......
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API Testing Tool
Free online HTTP request testing tool supporting GET, POST, PUT, PATCH, DELETE, HEAD, and OPTIONS requests, Query parameters, headers, JSON, Form URL Encoded......
Use NowIP Address Lookup
Free online IP address lookup tool that automatically detects your current public IP and lets you look up IPv4 and IPv6 addresses for location, ISP, ASN, net......
Use NowPing Online Checker
Free online Ping checker that tests the network connectivity and response latency of domains or IP addresses from multiple locations. View the IP address, lo......
Use NowHTTP Status Code Checker
Free online HTTP status code checker. Enter a webpage URL to check the HTTP status code, response status, response time, HTTP version, content type, redirect......
Use NowTCP Port Checker
Online TCP port checker. Enter a domain or IP address and specify a port to test whether the TCP port is accessible. View the IP address, connection latency ......
Use NowOnline URL Checker
Free online URL checker. Enter a website URL to check its HTTP status code, response time, server IP, server information, content type and HTTP response head......
Use NowWHOIS Lookup
Free online WHOIS lookup tool. Enter a domain name to view registration information including the registrar, registrar ID, registration date, expiration date......
Use NowIP/Subnet Calculator
Free online IP/subnet calculator. Calculate the network address, broadcast address, subnet mask, wildcard mask, first usable IP, last usable IP, total addres......
Use NowBrowser Information Checker
Free online browser information checker for viewing browser name and version, operating system, device type, User Agent, screen resolution, CPU cores, timezo......
Use NowURL Parser
Free online URL parser for quickly viewing the protocol, domain, port, path, query parameters, and fragment of a URL. Useful for web development, API debuggi......
Use NowDNS Lookup
Free online DNS lookup tool for checking A, AAAA, CNAME, MX, NS, TXT, and other DNS records. Enter a domain to view record types, values, TTL, and record cou......
Use NowWebSocket Online Tester
Online WebSocket testing tool that lets you test WebSocket and WSS connections directly in the browser without installing a client. Supports custom WebSocket......
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This section provides IP lookup, TCP port checking, HTTP status inspection, online Ping testing, Whois lookup, DNS lookup, and reverse IP lookup for website development, server operations, and network troubleshooting.
Common network tools
- IP address and IP geolocation lookup
- TCP port availability checking
- HTTP status codes and response information
- Online Ping testing
- Whois domain information lookup
- DNS record lookup
- Reverse IP lookup for historical domains
What are network tools used for?
When a website cannot be accessed, an HTTP status checker can help determine whether the server returns a normal response. A port checker can determine whether a specific service port accepts connections, while DNS lookup can help inspect domain resolution results.
Are network test results always accurate?
Online tests are usually initiated from specific servers or network nodes, so results can be affected by the target server, firewall, CDN, and network path. Actual access conditions may differ between regions.