Network & DNS Tools
Fast, free utilities for developers and sysadmins. No account required.
DNS
View all →DNS Lookup
Query DNS record types across multiple DNS servers.
Reverse DNS
PTR lookup with forward verification and hosted domains discovery via OTX and HackerTarget
Domain
View all →Domain Check
Comprehensive DNS health analysis with weighted scoring across NS, SOA, DNSSEC, MX, SPF, DMARC, and more
WHOIS Lookup
Domain WHOIS: registrar, creation/expiry dates, nameservers, status codes, registrant info
IP
View all →IP Lookup
Look up detailed networking and geolocation information for any IPv4 or IPv6 address with interactive map
My IP Address
Detect IPv4/IPv6, reverse DNS, GeoIP, ISP, ASN with interactive map
Subnet Calculator
IPv4/IPv6 CIDR calculator with host ranges, broadcast, wildcard mask. Auto-detects IP version
Website
View all →Site Up or Down
Check if a website is currently reachable with HTTP status code, response time, and SSL status
Website Check
Full website analysis: TLS/SSL, security headers, cookies, CMS detection, open ports, mixed content. Score out of 100
Productivity
View all →Paste
Create, share, and manage code/text snippets with syntax highlighting, expiration, and reporting