IP Lookup
Looks up IP, ASN, ISP, organization, geolocation, timezone, and PTR for log and traffic source checks.
Content hub · 16 tools
Network / IP
Tools for IP, subnet, CIDR, HTTP headers, redirects, and common network checks used in operations.
Check connectivity and web responses
The Network / IP group collects checks for ASN ownership, subnet capacity, open ports, response headers, and redirect chains.
Use this group when
- Look up public IP, ASN, ISP, and reverse DNS.
- Calculate subnets or check whether an IP belongs to CIDR ranges.
- Inspect HTTP headers, security headers, and redirect chains.
Tool list
PTR Lookup
Performs reverse DNS from an IP address to hostname, useful for mail server, log, and host identity checks.
What is my IP?
Shows the current public IP seen by the server and selected connection headers from the browser request.
Subnet Calculator
Calculates network, broadcast, subnet mask, wildcard, and usable host count from IPv4/CIDR.
IP Subnet Planner
Splits a base IPv4/CIDR range into VLSM subnets based on required host counts.
CIDR Checker
Checks whether an IPv4 address belongs to one or more CIDR ranges, allowlists, or firewall rules.
IP Range to CIDR
Converts a start-end IPv4 range into the smallest practical list of CIDR blocks.
CIDR to IP Range
Expands CIDR blocks into network, broadcast, and usable IP ranges for network configuration checks.
Port Checker
Checks whether TCP ports on a host or IP are open, closed, or not responding from the server side.
RDAP Lookup
Looks up domain registration or IP/ASN allocation data through RDAP from the relevant registry.
IPv4 Converter
Converts IPv4 between dotted decimal, integer, hex, and binary formats for network debugging.
IPv6 Formatter
Expands, compresses, and creates reverse DNS notation for IPv6 addresses.
HTTP Header Checker
Shows status code, redirect chain, response headers, response IP, and basic security headers for a URL.
Bulk HTTP Status Checker
Checks multiple URLs at once, showing status code, final URL, response IP, and response time.
Security Headers Checker
Reviews HTTP security headers such as HSTS, CSP, X-Frame-Options, and Referrer-Policy.
Redirect Chain Checker
Traces every redirect step for a URL to detect loops, long chains, or incorrect canonical redirects.
Frequently asked questions
Can Network / IP tools help debug websites?
Yes. You can check IPs, ports, HTTP headers, security headers, and redirects to understand request behavior quickly.
