CIDRをIPアドレスに展開ツール v2.0.3
IPv4形式のIPアドレスは192.168.0.1などの一般的な形式だけでなく、
192.168.0.1/24 などのネットマスク指定(/24部分)による範囲指定なども利用ができます。
これはCIDR形式、プレフィックス指定などとも呼ばれています。
ここではこのネットマスク指定によるIPアドレス範囲をIPアドレスに展開して表示します。
以下に、ネットマスク形式のIPアドレスを入力すると、
下部に対して、CIDR指定に含まれるIPアドレスが表示されます。
また範囲が広く、含まれるIPアドレスが多い場合には、
結果は「xxx.xxx.xxx.xxx – xxx.xxx.xxx.xxx」形式の範囲で表示します。
範囲表示された場合は、リンクをクリックすると範囲内のIPを再展開できます。
目次
CIDR形式 (66.180.120.0/23) から範囲内のIPアドレス展開
表示値でそのまま実行するとデモ動作の確認ができます。
CIDR展開情報
入力されたCIDRのネットワーク情報です。
属性 | 値 |
---|---|
入力IP範囲 | 66.180.120.0/23 |
ネットワーク(CIDR) | 66.180.120.0/23 |
サブネット表記 | 66.180.120.0/255.255.254.0 |
短縮表記 | 66.180.120 |
IPアドレス範囲 | 66.180.120.0 - 66.180.121.255 |
IPアドレス総数 | 512 |
ネットワークIP | 66.180.120.0 |
ブロードキャストIP | 66.180.121.255 |
ホストアドレス範囲 | 66.180.120.1 - 66.180.121.254 有効ホスト数( 510 台 ) |
サブネットマスク | 255.255.254.0 |
クラス属性 | クラスA |
IPアドレスの展開結果
IPアドレスの展開を行いました
No | IPアドレス範囲 |
---|---|
1 | 66.180.120.0 |
2 | 66.180.120.1 |
3 | 66.180.120.2 |
4 | 66.180.120.3 |
5 | 66.180.120.4 |
6 | 66.180.120.5 |
7 | 66.180.120.6 |
8 | 66.180.120.7 |
9 | 66.180.120.8 |
10 | 66.180.120.9 |
11 | 66.180.120.10 |
12 | 66.180.120.11 |
13 | 66.180.120.12 |
14 | 66.180.120.13 |
15 | 66.180.120.14 |
16 | 66.180.120.15 |
17 | 66.180.120.16 |
18 | 66.180.120.17 |
19 | 66.180.120.18 |
20 | 66.180.120.19 |
21 | 66.180.120.20 |
22 | 66.180.120.21 |
23 | 66.180.120.22 |
24 | 66.180.120.23 |
25 | 66.180.120.24 |
26 | 66.180.120.25 |
27 | 66.180.120.26 |
28 | 66.180.120.27 |
29 | 66.180.120.28 |
30 | 66.180.120.29 |
31 | 66.180.120.30 |
32 | 66.180.120.31 |
33 | 66.180.120.32 |
34 | 66.180.120.33 |
35 | 66.180.120.34 |
36 | 66.180.120.35 |
37 | 66.180.120.36 |
38 | 66.180.120.37 |
39 | 66.180.120.38 |
40 | 66.180.120.39 |
41 | 66.180.120.40 |
42 | 66.180.120.41 |
43 | 66.180.120.42 |
44 | 66.180.120.43 |
45 | 66.180.120.44 |
46 | 66.180.120.45 |
47 | 66.180.120.46 |
48 | 66.180.120.47 |
49 | 66.180.120.48 |
50 | 66.180.120.49 |
51 | 66.180.120.50 |
52 | 66.180.120.51 |
53 | 66.180.120.52 |
54 | 66.180.120.53 |
55 | 66.180.120.54 |
56 | 66.180.120.55 |
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60 | 66.180.120.59 |
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66 | 66.180.120.65 |
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68 | 66.180.120.67 |
69 | 66.180.120.68 |
70 | 66.180.120.69 |
71 | 66.180.120.70 |
72 | 66.180.120.71 |
73 | 66.180.120.72 |
74 | 66.180.120.73 |
75 | 66.180.120.74 |
76 | 66.180.120.75 |
77 | 66.180.120.76 |
78 | 66.180.120.77 |
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80 | 66.180.120.79 |
81 | 66.180.120.80 |
82 | 66.180.120.81 |
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84 | 66.180.120.83 |
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181 | 66.180.120.180 |
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251 | 66.180.120.250 |
252 | 66.180.120.251 |
253 | 66.180.120.252 |
254 | 66.180.120.253 |
255 | 66.180.120.254 |
256 | 66.180.120.255 |
257 | 66.180.121.0 |
258 | 66.180.121.1 |
259 | 66.180.121.2 |
260 | 66.180.121.3 |
261 | 66.180.121.4 |
262 | 66.180.121.5 |
263 | 66.180.121.6 |
264 | 66.180.121.7 |
265 | 66.180.121.8 |
266 | 66.180.121.9 |
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268 | 66.180.121.11 |
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270 | 66.180.121.13 |
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276 | 66.180.121.19 |
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284 | 66.180.121.27 |
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286 | 66.180.121.29 |
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288 | 66.180.121.31 |
289 | 66.180.121.32 |
290 | 66.180.121.33 |
291 | 66.180.121.34 |
292 | 66.180.121.35 |
293 | 66.180.121.36 |
294 | 66.180.121.37 |
295 | 66.180.121.38 |
296 | 66.180.121.39 |
297 | 66.180.121.40 |
298 | 66.180.121.41 |
299 | 66.180.121.42 |
300 | 66.180.121.43 |
301 | 66.180.121.44 |
302 | 66.180.121.45 |
303 | 66.180.121.46 |
304 | 66.180.121.47 |
305 | 66.180.121.48 |
306 | 66.180.121.49 |
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309 | 66.180.121.52 |
310 | 66.180.121.53 |
311 | 66.180.121.54 |
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313 | 66.180.121.56 |
314 | 66.180.121.57 |
315 | 66.180.121.58 |
316 | 66.180.121.59 |
317 | 66.180.121.60 |
318 | 66.180.121.61 |
319 | 66.180.121.62 |
320 | 66.180.121.63 |
321 | 66.180.121.64 |
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323 | 66.180.121.66 |
324 | 66.180.121.67 |
325 | 66.180.121.68 |
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508 | 66.180.121.251 |
509 | 66.180.121.252 |
510 | 66.180.121.253 |
511 | 66.180.121.254 |
512 | 66.180.121.255 |
IPアドレスの特殊属性
入力されたIPアドレス範囲の特殊IP属性に関する情報です。
特殊属性には該当しませんでした。
IP特殊属性 | 概要 | CIDR |
---|---|---|
グローバルアドレス | プライベートIPアドレス、リンクローカルアドレス、特殊用途のIPアドレスなどを除いた |
GLOBALS |
IPアドレスの特殊属性に割当てられた
各範囲・グローバルIPアドレスの範囲については、
以下リンク先でご確認下さい。
このツールの使用方法については以下でご紹介しています。
関連ツール
このツールに関連してCIDRをすべて展開するのではなく、
CIDR範囲に1つのIPアドレスが含まれているかどうかを、
チェックして確認するツールを作成公開しました。
併せてご活用いただければ幸いです。
さいごに
CIDRからIPアドレスの範囲をイメージすることは、
慣れるまでは少しとっつきにくい部分もあります。
ここでは実際に範囲を目視して、
それぞれの範囲を細かく見ていくことができるようにしています。
お役に立ちますと幸いです。
更新履歴情報
Ver. | 更新日 | 更新内容 |
---|---|---|
2.0.3 | 2018/05/10 | /32指定を行った際にエラーになる不具合を訂正。 |
2.0.2 | 2018/05/10 | 実行結果に表示のIP範囲再展開リンクをJavaScriptからURL形式へ変更。 Shiftを押しながらクリック等することで別画面表示を可能にし、 URLから実行結果を開けるように対応。 |
2.0.1 | 2018/05/09 | 実行結果に表示のCIDR再展開リンクをJavaScriptからURL形式へ変更。 Shiftを押しながらクリック等することで別画面表示を可能にし、 URLから実行結果を開けるように対応。 |
1.0.2 | 2015/02/21 | 特定のネットマスクの値に対しての表示結果を調整 |
1.0.1 | 2015/02/06 | 公開 |
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公開日:
最終更新日:2019/07/06