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IP Subnet Calculator

IP Range ↔ CIDR Subnet | IP Address ↔ Hexadecimal

Range → CIDR
CIDR → Range
IP → Hex
Hex → IP

CIDR Result

Supports single CIDR like 10.0.0.0/8 or 192.168.1.128/25

Subnet Details

Hexadecimal Result

8-digit hex representing a 32-bit IPv4 address, with or without 0x prefix

IP Address Result

How to Use

  • Range → CIDR: Enter a start and end IP to get the minimal set of CIDR blocks covering the range
  • CIDR → Range: Enter a CIDR notation to see network address, broadcast, usable host range, subnet mask, and total hosts
  • IP → Hex: Convert a dotted-decimal IP to its hexadecimal, decimal integer, and binary representations
  • Hex → IP: Convert an 8-digit hexadecimal value back to a dotted-decimal IP address
  • All processing runs locally in your browser. No data is uploaded.

User Reviews

Average 4.9 stars based on 8 user reviews.

Linda Zhou2026-01-26
Role: Network Administrator

I needed IP subnet calculator that could copy the result into an operations workflow, not just a generic page. IP Subnet Calculator keeps IP range to CIDR conversion and CIDR to IP range conversion close to the real workflow, and it turns network config input into reviewable output.

Emily Lin2026-04-05
Role: SRE

For people searching free online IP subnet calculator, this page matches the intent well. It is not a generic utility; IP Subnet Calculator is built around CIDR converter; bulk host, port, or record work is faster, and the result is easy to keep working with.

Tina Guo2026-01-10
Role: System Administrator

During DNS record cleanup, IP Subnet Calculator solves the part I worry about most: pre-launch format checks are often missing. By keeping IP to hexadecimal conversion visible in the workflow, there is less manual cleanup, and bulk hosts, domains, and records are faster to handle, so it belongs in my regular tool list.

David Zhang2026-04-15
Role: Security Engineer

I would recommend IP Subnet Calculator to anyone who needs IP subnet calculator. It covers long-tail needs like batch IP subnet calculator naturally, and features such as subnet details display make the result easier to check than an ad hoc workaround.

Kevin Wang2026-01-20
Role: Backend Engineer

The page focus is clear: the core is IP subnet calculator, CIDR converter, and operations change review. IP Subnet Calculator can organize network input and generate config output; it works as a final check before copying into config files, which makes it easy to judge before using it.

Ryan Liu2026-04-25
Role: Platform Engineer

When I need free online IP subnet calculator, I care about fewer steps. IP Subnet Calculator keeps subnet mask and wildcard mask display direct; with batch text input, follow-up review is easier for visitors coming from search.

Steven Sun2026-01-04
Role: Tech Lead

I found IP Subnet Calculator while looking for IP subnet calculator without upload, and the real issue was that ops changes need copy-ready output. Batch text input and free IPv4 CIDR subnet calculator are on the same page, so I can copy the result into an operations workflow without stitching several tools together.

Henry He2026-04-09
Role: DevOps Engineer

For IP subnet calculator work, the important part is whether the output is easy to verify. IP Subnet Calculator puts free IPv4 CIDR subnet calculator up front, it reduces format mistakes before copying into config files, and it handles CIDR converter work without sending me to another page.

Frequently Asked Questions

Is IP Subnet Calculator free to use?
Yes, IP Subnet Calculator is completely free with no registration required. All features are available without any limitations.
Is my data safe when using IP Subnet Calculator?
Absolutely. IP Subnet Calculator processes everything directly in your browser. No data is ever uploaded to any server, ensuring complete privacy and security.
Does IP Subnet Calculator work on mobile devices?
Yes, IP Subnet Calculator is fully responsive and works on smartphones, tablets, and desktop computers across all modern browsers.

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