Network
IP Range to CIDR Converter
Enter a start and end IP to get the CIDR blocks that cover the range — or go the other way and expand a CIDR into a range, or merge several CIDRs into one. Pick a newline or comma format and copy the results with one click.
IP 범위 CIDR 변환기, CIDR 계산기, IP range to CIDR, cidr to ip range, cidr summarization, cidr aggregation, firewall rule cidr, security group cidr- Created
- 2026.09.05
- Updated
- 2026.09.16
IP Range to CIDR Converter8 · 126
Direction
Smallest set of blocks covering the rangeExamples
Valid input
CIDR blocks
8Blocks8
Addresses covered126
Range10.0.0.5 — 10.0.0.130
0110.0.0.5/3210.0.0.5 — 10.0.0.51
0210.0.0.6/3110.0.0.6 — 10.0.0.72
0310.0.0.8/2910.0.0.8 — 10.0.0.158
0410.0.0.16/2810.0.0.16 — 10.0.0.3116
0510.0.0.32/2710.0.0.32 — 10.0.0.6332
0610.0.0.64/2610.0.0.64 — 10.0.0.12764
0710.0.0.128/3110.0.0.128 — 10.0.0.1292
0810.0.0.130/3210.0.0.130 — 10.0.0.1301
Copy format
CIDR blocks only come in power-of-two sizes, so a range that doesn't divide evenly gets split into several blocks. Merging only combines adjacent, alignment-compatible blocks, and overlapping blocks are cleaned up automatically. IPv6 isn't supported.
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How to use
1.
Pick a direction: Range → CIDR, CIDR → Range, or Merge CIDRs.
2.
Enter an IP range or a list of CIDRs.
3.
Check the calculated CIDR blocks, pick a copy format (newline or comma), and save with the copy button.
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FAQ
Tool info
Category Network
Processing Directly in your browser
Data storage Not stored
Created 2026-09-05
Updated 2026-09-16