Live connection
Your network, at a glance
Public address, geolocation and connection quality — refreshed on demand.
Geolocation & registry
Look up any IP or domain
Resolve an address, map its network, and pull registration data from RDAP.
Start with an address
Try , , or .
Resolver toolkit
DNS records, instantly
Query A, AAAA, MX, TXT and more over encrypted DNS-over-HTTPS.
Resolve a record
Try , , or .
Mail & SMTP
Check mail servers and email authentication
Validate your SMTP server, encryption, capabilities and email DNS records (SPF, DKIM, DMARC, MTA-STS).
SMTP server
Read banner, EHLO capabilities and encryption
Email authentication
SPF · DKIM · DMARC · MTA-STS · TLS-RPT
Site inspector
Inspect any website
Response headers, redirects and security posture in one pass.
DNS, lookup and tools work in static mode. Website inspection needs the bundled API — start it locally or point NetScope at your deployment.
python -m venv .venv && source .venv/bin/activate
pip install -r pyapp/requirements.txt
python pyapp/app.py
Audit a site before you ship
Try or .
Network utilities
Everyday network math
Subnets, IP conversions, URL anatomy, latency and WebRTC leak checks.
Subnet calculator
IPv4 / IPv6 CIDR breakdown
Network, broadcast, usable range and host count will appear here.
IP converter
IPv4 ↔ decimal ↔ hex, IPv6 expanded
Accepts an IPv4/IPv6 address or a 32-bit integer.
URL anatomy
Parse components and query parameters
Protocol, host, path and decoded query parameters.
Latency probe
Approximate round-trip to public edges
Measure latency to Cloudflare, Google, GitHub and this server.
WebRTC leak check
See which addresses your browser exposes
Modern browsers obfuscate local IPs with mDNS — that is a good thing.
Port reachability
Single TCP port check through the API
Requires the NetScope API. Public hosts only.
Client signals
Your browser environment
The signals every website can read — useful for debugging and privacy awareness.