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IP 範囲→CIDR 変換.
IP 範囲、アドレス一覧、重なり合うブロックを最小数の CIDR ブロックにまとめ、除外指定と全体を含むスーパーネットも求めます。
CALCULATED IN YOUR BROWSER · NOTHING IS UPLOADED
Minimal CIDR blocks6from 7 entries
- IPv4 addresses covered
- 644
- IPv6 addresses covered
- 1208925819614629174706176
- Smallest single IPv4 supernet
- 0.0.0.0/0 Covers everything but may include extra addresses
- Smallest single IPv6 supernet
- 2001:db8::/48
CIDR list
10.0.0.0/23
192.168.1.0/25
192.168.1.128/31
192.168.1.130/32
203.0.113.7/32
2001:db8::/48Blocks
| CIDR block | First address | Last address | Addresses |
|---|---|---|---|
| 10.0.0.0/23 | 10.0.0.0 | 10.0.1.255 | 512 |
| 192.168.1.0/25 | 192.168.1.0 | 192.168.1.127 | 128 |
| 192.168.1.128/31 | 192.168.1.128 | 192.168.1.129 | 2 |
| 192.168.1.130/32 | 192.168.1.130 | 192.168.1.130 | 1 |
| 203.0.113.7/32 | 203.0.113.7 | 203.0.113.7 | 1 |
| 2001:db8::/48 | 2001:db8:: | 2001:db8:0:ffff:ffff:ffff:ffff:ffff | 2^80 (1208925819614629174706176) |
- Overlapping and adjacent entries are merged first, then each range is split into the fewest aligned blocks.
- Comments after # are ignored. Commas or semicolons can separate several entries on one line.
使い方: IP 範囲→CIDR 変換
データを入力するかファイルを選び、設定を調整して結果を生成します。コピーやダウンロードの前に結果を確認してください。
制限と対応形式
入力内容はお使いの端末で処理されます。
英語の技術説明
Up to 5,000 lines; IPv4 and IPv6 can be mixed. The single supernet may include addresses that were not in the input. Everything is calculated in your browser; nothing is sent or probed on the network.
Entries are converted to start–end ranges, merged when they overlap or touch, reduced by the exclusions, and each remaining range is cut into the largest aligned power-of-two blocks.
192.168.1.0 – 192.168.1.130 becomes 192.168.1.0/25, 192.168.1.128/31 and 192.168.1.130/32; 10.0.0.0/25 and 10.0.0.128/25 merge into 10.0.0.0/24.