nw nwtools

Find the right network tool fast.

Search-first diagnostics for DNS, email, IP, routing, TLS, and security checks. Find the right tool by name, domain, IP, URL, ASN, or problem.

Try: MX Lookup, Ping, TLS Certificate Check, ASN Lookup, or DNS Propagation Check

DNSEmailIP & NetworkRouting & ASNWeb & TLSSecurity

DNS Tools

Lookup records, delegation, propagation, and DNS security signals.

View all

DNS Lookup

Query A, AAAA, CNAME, TXT, and other DNS records for a domain.

Open tool

NS Lookup

Check authoritative name servers and delegation for a domain.

Open tool

DNS Propagation Check

Verify whether recent DNS changes are visible across resolvers.

Open tool

Showing 3 of 15 tools in this category.

View DNS Tools

Email Tools

Diagnose email delivery, authentication, and mail routing issues.

View all

MX Lookup

Inspect mail exchange records and delivery destinations for a domain.

Open tool

SPF Check

Review SPF records and authorized sending sources for a domain.

Open tool

DMARC Check

Inspect DMARC policy, alignment, and reporting configuration.

Open tool

Showing 3 of 5 tools in this category.

View Email Tools

IP & Network Tools

Inspect hosts, latency, routes, and network-level connectivity.

View all

IP Lookup

Inspect basic ownership, reverse DNS, and network details for an IP.

Open tool

Ping

Check whether a host responds and measure round-trip latency.

Open tool

Traceroute

Trace the network path between a client and destination host.

Open tool

Showing 3 of 4 tools in this category.

View IP & Network Tools

Routing & ASN Tools

Understand ASN ownership, prefixes, and routing security.

View all

ASN Lookup

Look up AS numbers, prefixes, and operator ownership details.

Open tool

RPKI ROA Check

Validate origin authorization for routes and announced prefixes.

Open tool

BGP Prefix Lookup

Inspect BGP prefix visibility and route ownership context.

Open tool

Showing 3 of 3 tools in this category.

View Routing & ASN Tools

Web & TLS Tools

Check HTTP behavior, HTTPS availability, and certificate health.

View all

HTTP Check

Review HTTP response status, headers, and redirect behavior.

Open tool

HTTPS Check

Verify HTTPS availability, response chain, and TLS handshake basics.

Open tool

TLS Certificate Check

Inspect certificate validity, issuer chain, and expiry details.

Open tool

Showing 3 of 4 tools in this category.

View Web & TLS Tools

Security & Reputation Tools

Review blocklists, URL trust indicators, and exposure signals.

View all

Blacklist Check

Check whether an IP or domain appears on common reputation blocklists.

Open tool

URL Reputation Check

Review basic safety and trust signals for a URL or hostname.

Open tool

Security Headers Check

Review common browser-facing security headers on a site.

Open tool

Showing 3 of 2 tools in this category.

View Security & Reputation Tools
DNS Tools 15

DNS Lookup

Query A, AAAA, CNAME, TXT, and other DNS records for a domain.

Open tool

NS Lookup

Check authoritative name servers and delegation for a domain.

Open tool

DNS Propagation Check

Verify whether recent DNS changes are visible across resolvers.

Open tool

Showing 3 of 15 tools in this category.

View DNS Tools
Email Tools 5

MX Lookup

Inspect mail exchange records and delivery destinations for a domain.

Open tool

SPF Check

Review SPF records and authorized sending sources for a domain.

Open tool

DMARC Check

Inspect DMARC policy, alignment, and reporting configuration.

Open tool

Showing 3 of 5 tools in this category.

View Email Tools
IP & Network Tools 4

IP Lookup

Inspect basic ownership, reverse DNS, and network details for an IP.

Open tool

Ping

Check whether a host responds and measure round-trip latency.

Open tool

Traceroute

Trace the network path between a client and destination host.

Open tool

Showing 3 of 4 tools in this category.

View IP & Network Tools
Routing & ASN Tools 3

ASN Lookup

Look up AS numbers, prefixes, and operator ownership details.

Open tool

RPKI ROA Check

Validate origin authorization for routes and announced prefixes.

Open tool

BGP Prefix Lookup

Inspect BGP prefix visibility and route ownership context.

Open tool

Showing 3 of 3 tools in this category.

View Routing & ASN Tools
Web & TLS Tools 4

HTTP Check

Review HTTP response status, headers, and redirect behavior.

Open tool

HTTPS Check

Verify HTTPS availability, response chain, and TLS handshake basics.

Open tool

TLS Certificate Check

Inspect certificate validity, issuer chain, and expiry details.

Open tool

Showing 3 of 4 tools in this category.

View Web & TLS Tools
Security & Reputation Tools 2

Blacklist Check

Check whether an IP or domain appears on common reputation blocklists.

Open tool

URL Reputation Check

Review basic safety and trust signals for a URL or hostname.

Open tool

Security Headers Check

Review common browser-facing security headers on a site.

Open tool

Showing 3 of 2 tools in this category.

View Security & Reputation Tools

Common questions about the tool directory.

What should I use to find a domain’s mail servers?

Start with MX Lookup to see delivery endpoints, then use SPF, DKIM, and DMARC checks if mail is failing.

Open related tools

How do I troubleshoot a website that is down?

Begin with DNS Lookup, then Ping and HTTP Check to separate DNS, network, and application issues.

Open related tools

Which tool helps with SSL certificate warnings?

TLS Certificate Check is the best first step, followed by HTTPS Check for handshake and redirect behavior.

Open related tools

How can I see whether DNS changes have propagated?

Use DNS Propagation Check alongside NS Lookup to compare what resolvers and authoritative servers return.

Open related tools

What tool should I use for ASN or route ownership?

ASN Lookup gives ownership context, and RPKI ROA Check helps verify route origin authorization.

Open related tools