CIDR Aggregator
Compute a covering supernet for multiple CIDR blocks.
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DNS Lookup
Query DNS records by type for a host.
DNS Propagation Checker
Check DNS record propagation across major public resolvers.
DNS Record Builder
Generate valid DNS zone record lines for common record types.
IP Classifier
Classify IPv4/IPv6 addresses by private, loopback, multicast, and more.
IP Lookup
Inspect IP type and reverse DNS details.
MTU MSS Calculator
Calculate effective payload and TCP MSS from MTU and tunnel overhead.
Packet Loss Impact Estimator
Estimate throughput degradation from loss and RTT assumptions.
Port Range Planner
Plan port ranges against concurrent session requirements.
Subnet Calculator
Calculate network, broadcast, host range, and mask details from CIDR.
Supernet Calculator
Find the smallest covering CIDR for an IPv4 start/end range.
Throughput Unit Converter
Convert bps/Kbps/Mbps/Gbps and estimate transfer time.
Uptime SLA Calculator
Translate SLA percentage targets into allowed downtime windows.
VLSM Planner
Plan variable-length subnet allocations from a base CIDR.
What's My IP
Show the client IP address seen by the server.
IPv4 to Integer Converter
Convert IPv4 addresses to 32-bit integers and back.
IPv6 Compressor Expander
Compress or fully expand IPv6 notation.
Latency Budget Calculator
Allocate and track end-to-end latency budget across system components.
WHOIS Lookup
Fetch WHOIS registration data for domains.
Wildcard Mask Calculator
Convert subnet masks into wildcard masks for ACL rules.