Network Tools

Network diagnostics, DNS, IP, and connectivity analysis tools

14 tools available

Essential networking utilities for DNS lookups, subnet calculations, WHOIS queries, IP geolocation, and BGP AS lookups. These tools help you troubleshoot connectivity issues, investigate suspicious IP addresses, and plan network architectures.

Whether you're debugging why a domain isn't resolving, calculating subnet ranges for a new office, or investigating where traffic is coming from, these tools provide the quick answers network professionals need. Results include explanations to help you understand what you're seeing.

Who Uses These Tools

Network administrators troubleshooting DNS resolution and routing issues

Security analysts investigating suspicious IP addresses and domains

DevOps engineers planning subnet allocations and CIDR ranges

Developers debugging redirect chains and URL routing problems

Infrastructure & Reference

MAC address lookup, port reference, firewall rules, and wireless planning

1 tool

Need Expert Help?

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Frequently Asked Questions

Why might DNS lookup results differ from what I see locally?

DNS results vary based on geographic location, DNS provider, and cache timing. Our lookups query authoritative nameservers directly. If you see different results locally, your ISP or local resolver may have cached older records. TTL values in results indicate how long records are cached.

How accurate is WHOIS information?

WHOIS data comes from domain registrars and varies in completeness. Privacy protection services may obscure registrant details. For security investigations, WHOIS provides useful metadata like registration dates and nameservers even when contact info is redacted.

Can I use the subnet calculator for IPv6?

Yes, the subnet calculator supports both IPv4 and IPv6 addressing. IPv6 calculations include prefix lengths, address ranges, and network/host portions. We also offer a dedicated IPv4/IPv6 converter for format translation.

How do I check if an IP address is malicious?

Start with the IP Geolocation Lookup to identify the network owner and location. For reputation data, use our IP Risk Checker which queries threat intelligence feeds. Combine this with BGP AS Lookup to understand the hosting infrastructure.