Network Tools
Free online tools for network engineers, security analysts, and developers. No signup required.
CIDR / Subnet Calculator
Calculate network address, broadcast, host range, subnet mask, and wildcard mask for any IPv4 or IPv6 prefix.
IP Reputation Check
Check any IP address for threats. Composite threat score, blocklist status, and abuse indicators.
Tor Exit Node Checker
Check if any IP address is a Tor exit node. Real-time detection, updated regularly.
BGP Route Lookup
Look up BGP routes for any IP or prefix. See origin ASN, RPKI validation, and MOAS detection.
RPKI & ROA Lookup
Validate BGP route origins with RPKI ROAs. Check if a prefix has a valid Route Origin Authorization.
ASPA Check
Check BGP provider authorization records. See which upstream transit providers an AS has authorized.
WHOIS / RDAP Lookup
Look up registration data for any IP address. Network holder, RIR allocation, abuse contacts, and registration dates.
IPv4 Transfer Statistics
Every IPv4, IPv6 and ASN transfer published by the five RIRs: monthly volume, inter-RIR flows, top countries and a searchable log.
Global Threat Map
Daily world map of malicious IPs by country: botnets, C2, scanners, brute force and spam, per million allocated IPv4 addresses, plus the worst networks.
BGP Statistics
Global routing table size, RPKI coverage, RPKI-invalid routes and ASPA adoption, updated continuously.