ANALYZE · CHECK · SOLVE

Understand what connects.

FOCUSED TOOLS FOR A SAFER NETWORK

Focused diagnostics for networks, DNS, web services and mail security.

IP 216.73.217.142

ASN Loading…

Location Loading…

Network

Network

IP calculator

Calculate IPv4 and IPv6 network details.

CIDR tools

Split and aggregate network ranges.

Port lookup

Identify common ports and services.

MAC / OUI

Look up a hardware vendor from a MAC address.

DNS

DNS

DNS lookup

Inspect public DNS records.

DNS delegation

Analyze parent and child delegation evidence.

DNS multi-resolver

Compare answers across documented public resolvers.

Reverse DNS

Look up PTR records for an address.

Mail DNS

Inspect MX, SPF, DMARC, and mail policy.

DNSSEC

Inspect DNSSEC records and status.

Web & TLS

Web & TLS

HTTP headers

Inspect public HTTP response headers.

Redirect checker

Trace public HTTP redirect chains.

TLS inspector

Inspect certificates and TLS metadata.

Routing

Routing

BGP / ASN / RPKI

Inspect route origin, organization, and RPKI state.

SMTP transport

Inspect public mail transport safely.

HTTP security

Inspect public web security headers.

Domain Health

Bounded DNS and mail health checks.

Internet Identity

Public IP and routing context.

Ping / Reachability

Bounded public reachability test.

Traceroute / Path

Bounded public path test.

Network Path

DNS to HTTP path analysis.

TCP Connectivity

Test one public TCP port.

Advanced diagnostics

Advanced diagnostics

HTTP protocol

Inspect HTTP version and compression.

Mail domain health

Inspect mail-domain policy and transport records.

IPv6 toolbox

Normalize and classify IPv6 addresses.

CIDR overlap

Compare networks and containment.

Firewall rule helper

Generate reviewed rule examples.

Registration

Registration

RDAP lookup

Look up domains, IPs, and ASNs.

Encoding

Encoding

Encode / decode

Transform text locally in your browser.

Mail & Security

Mail & Security

EICAR mail scanner test

Send one selected EICAR variant to an authorized scanner mailbox.

Diagnostics

Browser capabilities

Run privacy-preserving local feature detection without fingerprinting or automatic permission requests.

Open browser capabilities