troubleshooting.tools

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troubleshooting.tools needs JavaScript for interactive tools like DNS lookups, port checks and data converters.

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Look up IP and MAC addresses, query DNS records, check open ports, trace network paths and grade the TLS setup of a server.

IP Address Lookup

Get detailed information about IPv4 and IPv6 addresses including location, ISP, and registry data.

External API Open tool

MAC Address Vendor Lookup

Look up MAC address vendor information using a local OUI database.

Server-side Open tool

DNS Lookup

Query DNS records for domains. Supports A, AAAA, MX, CNAME, TXT, NS, SOA, SRV, CAA, PTR.

Network query Open tool

PCAP Analyzer

Open a pcap or pcapng capture in the browser: every packet decoded from Ethernet to DNS and TLS, with filters and conversations. Nothing is uploaded.

Client-side Open tool

Port Checker

Check if TCP ports are open on remote hosts. Supports single ports and port ranges.

Network query Open tool

Sonos Radio Stream Checker

Check if your radio stream URLs are compatible with Sonos S1 and S2 speakers.

Network query Open tool

SSL/TLS Server Test

Grade the TLS setup of a server: protocol versions, cipher suites, certificate chain, HSTS and known weaknesses.

Network query Open tool

TLD Lookup

Every top level domain in the root zone, what kind it is, and for a country code which country.

Server-side Open tool

Traceroute

Trace network paths to IPv4 and IPv6 addresses, identify routing issues, and analyze latency.

Network query Open tool