Networking
Network utilities and IP tools
ASN Assignments
Complete Autonomous System Number (ASN) allocation from IANA. View 16-bit and 32-bit ASN assignments by Regional Internet Registries.
IP Calculator
Calculate IP subnet information for IPv4 and IPv6. Get network address, broadcast address, host range, and binary representations. CIDR notation supported.
IP to PTR Record
Convert IPv4 and IPv6 addresses to PTR (reverse DNS) records. Generate in-addr.arpa and ip6.arpa format for DNS zone files.
IPv4 Address Space
Complete IPv4 address space allocation from IANA. View Regional Internet Registry (RIR) assignments and reserved address blocks.
IPv4 CIDR Reference
Complete IPv4 CIDR notation reference table with subnet masks, network addresses, and host counts. Quick lookup for network planning.
IPv6 Address Space
Complete IPv6 unicast address space allocation from IANA. View global IPv6 address assignments by RIR and reservation status.
IPv6 CIDR Reference
Complete IPv6 CIDR notation reference with address ranges and subnet calculations. Essential guide for IPv6 network design.
Random IP Generator
Generate random IPv4 and IPv6 addresses within specified CIDR ranges. Customize output quantity and exclusion rules for network testing.
Root Zone Database
Complete DNS root zone database with all top-level domains (TLDs). Search and browse gTLDs, ccTLDs, and their registry operators.