Internet and networking online tools

Online networking tools are web-based utilities that inspect and diagnose internet connections without requiring software to be installed. They let users look up information about IP addresses and domain names, test whether a host is reachable, and trace the path that data takes across the network. Because they run on a remote server, they also show how a site or service appears from somewhere other than the user's own computer.

Several classic diagnostics appear in web form. Ping sends small probe packets to a host and measures whether they return and how long the round trip takes. Traceroute reveals each router (hop) a packet passes through on its way to a destination, which helps locate where a connection slows down or fails. Whois queries registration records for a domain or IP block, while DNS lookup (nslookup) translates between domain names and addresses and shows mail and name-server records. Some services perform IP geolocation, estimating the approximate country, region or city associated with an address using databases that map IP ranges to locations.

Other tools report on the local connection itself, helping tune parameters such as the MTU (the largest packet size a link will carry without fragmentation), the TCP receive window that governs how much data can be in transit, and the TTL (time-to-live) value that limits how many hops a packet may take. Proxy testers and port scanners check whether traffic is being relayed or which services are reachable. Together these utilities form a practical toolkit for troubleshooting connectivity and understanding network behaviour.

Frequently asked questions

What does traceroute show?

It lists each router a packet passes through on the way to a destination, along with timing, helping identify where delays or failures occur.

How accurate is IP geolocation?

It estimates location from databases that map IP ranges to places. Country-level results are usually reliable, but city-level accuracy varies and can be wrong.

What is whois used for?

Whois retrieves registration details for a domain name or IP address block, such as the registrant, registrar and associated name servers.