Free Online Network Tools
IP address lookup, subnet calculator, DNS tools and network utilities.
Subnet Calculator
Calculate subnet mask, network, broadcast, and host range from CIDR
Try now βIP Address Converter
Convert IP addresses between decimal, hex, binary, and dotted formats
Try now βBandwidth Calculator
Calculate file transfer time based on file size and connection speed
Try now βMAC Address Generator
Generate random MAC addresses in various formats
Try now βNetwork Port Reference
Searchable reference of common TCP and UDP port numbers
Try now βIP Range Calculator
Calculate all IP addresses in a CIDR range
Try now βUser Agent Parser
Parse and analyze browser user agent strings
Try now βHTTP Header Analyzer
Analyze and categorize HTTP response headers
Try now βWhy Use Tuttilo Network Tools?
- Quick IP and network diagnostics without installing software.
- Subnet calculator for CIDR notation and IP range planning.
- All client-side calculations β your network data stays private.
Frequently Asked Questions
Can I find my public IP address?+
Yes. Our IP lookup tool shows your public IP address, approximate location and ISP information.
What subnet calculations are supported?+
CIDR to IP range, subnet mask calculation, number of hosts, network and broadcast addresses.
Are DNS lookups available?+
DNS lookups require server-side processing. We provide client-side subnet and IP tools that work entirely in your browser.