Network Tools
Debug APIs, clean content, format data, and run release checks directly in your browser.
Tools for HTTP, DNS, IP, and protocol fields β locate network issues fast and dissect header fields.
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DNS Record Generator
Generate A, AAAA, CNAME, TXT and MX records
DNS & Domain
IPv6 Validator
Validate and normalize IPv6 addresses in bulk
IP & Routing
CIDR Range Converter
Convert CIDR blocks and IP ranges
IP & Routing
IPv4 Integer Converter
Convert IPv4 addresses and 32-bit integers
IP & Routing
CIDR Subnet Splitter
Split a CIDR block into smaller subnets
IP & Routing
MAC Address Generator
Generate random MAC addresses with format control
IP & Routing
DNS Zone Parser
Parse BIND zone files into structured records
IP & Routing
CIDR Merger
Merge overlapping and adjacent CIDR blocks
IP & Routing
IP Port Extractor
Extract IPv4 and IPv6 endpoints from text
IP & Routing
MAC Address Validator and Formatter
Validate and convert MAC addresses between common notations
IP & Routing
IP in CIDR Checker
Check IPv4 and IPv6 addresses against multiple CIDR blocks
IP & Routing
IPv6 Subnet Calculator
Calculate IPv6 CIDR ranges, address counts and child subnet previews
IP & Routing
IPv6 Range to CIDR Converter
Convert IPv6 start and end addresses to a minimal CIDR set, or expand a CIDR range
IP & Routing
IPv6 Reverse DNS Generator
Generate ip6.arpa PTR owners, reverse zones, and a BIND snippet
IP & Routing
CIDR Exclude Calculator
Subtract IPv4 or IPv6 subnets from a parent CIDR and return the minimal remainder
IP & Routing
Wildcard Mask Calculator
Convert an IPv4 CIDR or subnet mask into a Cisco ACL wildcard and examples
IP & Routing
MAC Vendor Lookup
Look up manufacturer by MAC address OUI
General Network
IP Address Anonymizer
Mask IP addresses in logs (IPv4/IPv6)
General Network
DMARC Checker
Check DMARC, SPF, and an optional DKIM selector over DNS
DNS & Domain