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DevToolKit

Network Tools

11 tools

Network analysis and utility tools including IP address lookup, subnet calculation, DNS queries, and header inspection.

Professional IPv4 Converter

Convert IPv4 addresses between dot-decimal, binary, hexadecimal, octal, and decimal (long) formats. Includes class detection and IPv6 mapping.

Professional IPv4 Range Expander

Expand CIDR blocks and IP ranges into full lists of addresses. Calculate network, broadcast, and usable hosts instantly. High performance local processing.

Professional IPv4 to IPv6 Converter

Convert IPv4 addresses to various IPv6 mapped and transition formats. Supports IPv4-Mapped, 6to4, NAT64, and hexadecimal representations. 100% private.

IPv6 ULA Prefix Generator

Generate RFC 4193 compliant IPv6 Unique Local Addresses (ULA) instantly. Create random 40-bit Global IDs and 16-bit Subnet IDs for private networking. 100% private.

MAC Address & Vendor Inspector

Instantly identify device manufacturers and analyze MAC address properties. Features IEEE OUI database, bit-flag detection (U/L, I/G), and batch lookup support. 100% private.

IPv4 Subnet Calculator

Visual 32-bit binary map, VLSM designer for optimal address allocation, and CIDR aggregation for route summarization.

DNS Lookup

Query DNS records for any domain using Cloudflare DNS-over-HTTPS. Look up A, AAAA, CNAME, MX, TXT, NS, SOA, and SRV records with SPF/DMARC analysis.

What Is My IP

Instantly see your public IP address, geolocation, ISP, ASN, and connection details. Includes WebRTC leak detection for VPN users.

Ping Tool

TCP handshake and HTTP TTFB ping from Cloudflare edge. Real-time latency chart, jitter analysis, packet loss stats, and terminal-style output.

Internet Speed Test

Measure download speed, upload speed, and latency using Cloudflare edge servers. Includes jitter analysis, adaptive payload sizing, and visual gauges.

WHOIS Domain Lookup

Query domain registration details via RDAP — registrar, expiration dates with countdown, nameservers, DNSSEC status, and contact information.