IP 位址列表: 0.123.*.* (0.123.0.* - 0.123.255.*) | IP 位址(繁體中文)

您在這裡

這是第壹個字節為0，第二個字節為123，第三個字節在0 - 255之間，第四字節可變動（下面為星號）的 IP 位址列表，表示為0.123.*.* (0.123.0.0 - 0.123.255.255)。

這個 IP 位址列表中包含256 * 256 = 65,536個 IP 位址，我們以其中壹個 IP 位址0.123.1.1為例，來描述這個IP的屬性：

首個 IP 位址範例

但這只是其中1個 IP 位址的例子，並不代表這個列表中所有的 IP 位址都有同樣的屬性，如果需要了解其它IP和更詳細的 IP 位址段信息，請點擊下面列表中的標題鏈接。

IPv4: 0.123 Network Class, Net ID, Host ID

二進制、十進制和十六進制的 IP 位址說明 IP 位址類別 A/B/C/D/E 和網絡 ID、主機 ID 的說明

內容:

2. A 類別 IP 位址列表

在歷史上的「分類」定址系統中，A 類 IP 位址 是為超大型網路設計的一部分範圍。其結構分為兩個主要部分：第一個數字（第一個位元組）用於識別網路，而最後三個數字（最後三個位元組）用於識別該網路內的個別裝置（或主機）。A 類位址的一個關鍵技術規則是，在其二進位形式中，第一位元必須始終為 0。

這種結構定義了可用的 A 類位址範圍為 1.0.0.0 到 126.255.255.255（127.x.x.x 位址區塊被保留用於回送等特殊目的）。這導致了 A 類網路可能存在的數量很少（只有 126 個），但每個網路都可以支援海量裝置：超過 1600 萬台主機 (2²⁴ - 2)。

要了解有關此類中特定網路區塊的更多詳細資訊，您可以點擊下面列表中的條目。

0.123.0.*(0.123.0.0 - 0.123.0.254)
0.123.1.*(0.123.1.0 - 0.123.1.254)
0.123.2.*(0.123.2.0 - 0.123.2.254)
0.123.3.*(0.123.3.0 - 0.123.3.254)
0.123.4.*(0.123.4.0 - 0.123.4.254)
0.123.5.*(0.123.5.0 - 0.123.5.254)
0.123.6.*(0.123.6.0 - 0.123.6.254)
0.123.7.*(0.123.7.0 - 0.123.7.254)
0.123.8.*(0.123.8.0 - 0.123.8.254)
0.123.9.*(0.123.9.0 - 0.123.9.254)
0.123.10.*(0.123.10.0 - 0.123.10.254)
0.123.11.*(0.123.11.0 - 0.123.11.254)
0.123.12.*(0.123.12.0 - 0.123.12.254)
0.123.13.*(0.123.13.0 - 0.123.13.254)
0.123.14.*(0.123.14.0 - 0.123.14.254)
0.123.15.*(0.123.15.0 - 0.123.15.254)
0.123.16.*(0.123.16.0 - 0.123.16.254)
0.123.17.*(0.123.17.0 - 0.123.17.254)
0.123.18.*(0.123.18.0 - 0.123.18.254)
0.123.19.*(0.123.19.0 - 0.123.19.254)
0.123.20.*(0.123.20.0 - 0.123.20.254)
0.123.21.*(0.123.21.0 - 0.123.21.254)
0.123.22.*(0.123.22.0 - 0.123.22.254)
0.123.23.*(0.123.23.0 - 0.123.23.254)
0.123.24.*(0.123.24.0 - 0.123.24.254)
0.123.25.*(0.123.25.0 - 0.123.25.254)
0.123.26.*(0.123.26.0 - 0.123.26.254)
0.123.27.*(0.123.27.0 - 0.123.27.254)
0.123.28.*(0.123.28.0 - 0.123.28.254)
0.123.29.*(0.123.29.0 - 0.123.29.254)
0.123.30.*(0.123.30.0 - 0.123.30.254)
0.123.31.*(0.123.31.0 - 0.123.31.254)
0.123.32.*(0.123.32.0 - 0.123.32.254)
0.123.33.*(0.123.33.0 - 0.123.33.254)
0.123.34.*(0.123.34.0 - 0.123.34.254)
0.123.35.*(0.123.35.0 - 0.123.35.254)
0.123.36.*(0.123.36.0 - 0.123.36.254)
0.123.37.*(0.123.37.0 - 0.123.37.254)
0.123.38.*(0.123.38.0 - 0.123.38.254)
0.123.39.*(0.123.39.0 - 0.123.39.254)
0.123.40.*(0.123.40.0 - 0.123.40.254)
0.123.41.*(0.123.41.0 - 0.123.41.254)
0.123.42.*(0.123.42.0 - 0.123.42.254)
0.123.43.*(0.123.43.0 - 0.123.43.254)
0.123.44.*(0.123.44.0 - 0.123.44.254)
0.123.45.*(0.123.45.0 - 0.123.45.254)
0.123.46.*(0.123.46.0 - 0.123.46.254)
0.123.47.*(0.123.47.0 - 0.123.47.254)
0.123.48.*(0.123.48.0 - 0.123.48.254)
0.123.49.*(0.123.49.0 - 0.123.49.254)
0.123.50.*(0.123.50.0 - 0.123.50.254)
0.123.51.*(0.123.51.0 - 0.123.51.254)
0.123.52.*(0.123.52.0 - 0.123.52.254)
0.123.53.*(0.123.53.0 - 0.123.53.254)
0.123.54.*(0.123.54.0 - 0.123.54.254)
0.123.55.*(0.123.55.0 - 0.123.55.254)
0.123.56.*(0.123.56.0 - 0.123.56.254)
0.123.57.*(0.123.57.0 - 0.123.57.254)
0.123.58.*(0.123.58.0 - 0.123.58.254)
0.123.59.*(0.123.59.0 - 0.123.59.254)
0.123.60.*(0.123.60.0 - 0.123.60.254)
0.123.61.*(0.123.61.0 - 0.123.61.254)
0.123.62.*(0.123.62.0 - 0.123.62.254)
0.123.63.*(0.123.63.0 - 0.123.63.254)
0.123.64.*(0.123.64.0 - 0.123.64.254)
0.123.65.*(0.123.65.0 - 0.123.65.254)
0.123.66.*(0.123.66.0 - 0.123.66.254)
0.123.67.*(0.123.67.0 - 0.123.67.254)
0.123.68.*(0.123.68.0 - 0.123.68.254)
0.123.69.*(0.123.69.0 - 0.123.69.254)
0.123.70.*(0.123.70.0 - 0.123.70.254)
0.123.71.*(0.123.71.0 - 0.123.71.254)
0.123.72.*(0.123.72.0 - 0.123.72.254)
0.123.73.*(0.123.73.0 - 0.123.73.254)
0.123.74.*(0.123.74.0 - 0.123.74.254)
0.123.75.*(0.123.75.0 - 0.123.75.254)
0.123.76.*(0.123.76.0 - 0.123.76.254)
0.123.77.*(0.123.77.0 - 0.123.77.254)
0.123.78.*(0.123.78.0 - 0.123.78.254)
0.123.79.*(0.123.79.0 - 0.123.79.254)
0.123.80.*(0.123.80.0 - 0.123.80.254)
0.123.81.*(0.123.81.0 - 0.123.81.254)
0.123.82.*(0.123.82.0 - 0.123.82.254)
0.123.83.*(0.123.83.0 - 0.123.83.254)
0.123.84.*(0.123.84.0 - 0.123.84.254)
0.123.85.*(0.123.85.0 - 0.123.85.254)
0.123.86.*(0.123.86.0 - 0.123.86.254)
0.123.87.*(0.123.87.0 - 0.123.87.254)
0.123.88.*(0.123.88.0 - 0.123.88.254)
0.123.89.*(0.123.89.0 - 0.123.89.254)
0.123.90.*(0.123.90.0 - 0.123.90.254)
0.123.91.*(0.123.91.0 - 0.123.91.254)
0.123.92.*(0.123.92.0 - 0.123.92.254)
0.123.93.*(0.123.93.0 - 0.123.93.254)
0.123.94.*(0.123.94.0 - 0.123.94.254)
0.123.95.*(0.123.95.0 - 0.123.95.254)
0.123.96.*(0.123.96.0 - 0.123.96.254)
0.123.97.*(0.123.97.0 - 0.123.97.254)
0.123.98.*(0.123.98.0 - 0.123.98.254)
0.123.99.*(0.123.99.0 - 0.123.99.254)
0.123.100.*(0.123.100.0 - 0.123.100.254)
0.123.101.*(0.123.101.0 - 0.123.101.254)
0.123.102.*(0.123.102.0 - 0.123.102.254)
0.123.103.*(0.123.103.0 - 0.123.103.254)
0.123.104.*(0.123.104.0 - 0.123.104.254)
0.123.105.*(0.123.105.0 - 0.123.105.254)
0.123.106.*(0.123.106.0 - 0.123.106.254)
0.123.107.*(0.123.107.0 - 0.123.107.254)
0.123.108.*(0.123.108.0 - 0.123.108.254)
0.123.109.*(0.123.109.0 - 0.123.109.254)
0.123.110.*(0.123.110.0 - 0.123.110.254)
0.123.111.*(0.123.111.0 - 0.123.111.254)
0.123.112.*(0.123.112.0 - 0.123.112.254)
0.123.113.*(0.123.113.0 - 0.123.113.254)
0.123.114.*(0.123.114.0 - 0.123.114.254)
0.123.115.*(0.123.115.0 - 0.123.115.254)
0.123.116.*(0.123.116.0 - 0.123.116.254)
0.123.117.*(0.123.117.0 - 0.123.117.254)
0.123.118.*(0.123.118.0 - 0.123.118.254)
0.123.119.*(0.123.119.0 - 0.123.119.254)
0.123.120.*(0.123.120.0 - 0.123.120.254)
0.123.121.*(0.123.121.0 - 0.123.121.254)
0.123.122.*(0.123.122.0 - 0.123.122.254)
0.123.123.*(0.123.123.0 - 0.123.123.254)
0.123.124.*(0.123.124.0 - 0.123.124.254)
0.123.125.*(0.123.125.0 - 0.123.125.254)
0.123.126.*(0.123.126.0 - 0.123.126.254)
0.123.127.*(0.123.127.0 - 0.123.127.254)
0.123.128.*(0.123.128.0 - 0.123.128.254)
0.123.129.*(0.123.129.0 - 0.123.129.254)
0.123.130.*(0.123.130.0 - 0.123.130.254)
0.123.131.*(0.123.131.0 - 0.123.131.254)
0.123.132.*(0.123.132.0 - 0.123.132.254)
0.123.133.*(0.123.133.0 - 0.123.133.254)
0.123.134.*(0.123.134.0 - 0.123.134.254)
0.123.135.*(0.123.135.0 - 0.123.135.254)
0.123.136.*(0.123.136.0 - 0.123.136.254)
0.123.137.*(0.123.137.0 - 0.123.137.254)
0.123.138.*(0.123.138.0 - 0.123.138.254)
0.123.139.*(0.123.139.0 - 0.123.139.254)
0.123.140.*(0.123.140.0 - 0.123.140.254)
0.123.141.*(0.123.141.0 - 0.123.141.254)
0.123.142.*(0.123.142.0 - 0.123.142.254)
0.123.143.*(0.123.143.0 - 0.123.143.254)
0.123.144.*(0.123.144.0 - 0.123.144.254)
0.123.145.*(0.123.145.0 - 0.123.145.254)
0.123.146.*(0.123.146.0 - 0.123.146.254)
0.123.147.*(0.123.147.0 - 0.123.147.254)
0.123.148.*(0.123.148.0 - 0.123.148.254)
0.123.149.*(0.123.149.0 - 0.123.149.254)
0.123.150.*(0.123.150.0 - 0.123.150.254)
0.123.151.*(0.123.151.0 - 0.123.151.254)
0.123.152.*(0.123.152.0 - 0.123.152.254)
0.123.153.*(0.123.153.0 - 0.123.153.254)
0.123.154.*(0.123.154.0 - 0.123.154.254)
0.123.155.*(0.123.155.0 - 0.123.155.254)
0.123.156.*(0.123.156.0 - 0.123.156.254)
0.123.157.*(0.123.157.0 - 0.123.157.254)
0.123.158.*(0.123.158.0 - 0.123.158.254)
0.123.159.*(0.123.159.0 - 0.123.159.254)
0.123.160.*(0.123.160.0 - 0.123.160.254)
0.123.161.*(0.123.161.0 - 0.123.161.254)
0.123.162.*(0.123.162.0 - 0.123.162.254)
0.123.163.*(0.123.163.0 - 0.123.163.254)
0.123.164.*(0.123.164.0 - 0.123.164.254)
0.123.165.*(0.123.165.0 - 0.123.165.254)
0.123.166.*(0.123.166.0 - 0.123.166.254)
0.123.167.*(0.123.167.0 - 0.123.167.254)
0.123.168.*(0.123.168.0 - 0.123.168.254)
0.123.169.*(0.123.169.0 - 0.123.169.254)
0.123.170.*(0.123.170.0 - 0.123.170.254)
0.123.171.*(0.123.171.0 - 0.123.171.254)
0.123.172.*(0.123.172.0 - 0.123.172.254)
0.123.173.*(0.123.173.0 - 0.123.173.254)
0.123.174.*(0.123.174.0 - 0.123.174.254)
0.123.175.*(0.123.175.0 - 0.123.175.254)
0.123.176.*(0.123.176.0 - 0.123.176.254)
0.123.177.*(0.123.177.0 - 0.123.177.254)
0.123.178.*(0.123.178.0 - 0.123.178.254)
0.123.179.*(0.123.179.0 - 0.123.179.254)
0.123.180.*(0.123.180.0 - 0.123.180.254)
0.123.181.*(0.123.181.0 - 0.123.181.254)
0.123.182.*(0.123.182.0 - 0.123.182.254)
0.123.183.*(0.123.183.0 - 0.123.183.254)
0.123.184.*(0.123.184.0 - 0.123.184.254)
0.123.185.*(0.123.185.0 - 0.123.185.254)
0.123.186.*(0.123.186.0 - 0.123.186.254)
0.123.187.*(0.123.187.0 - 0.123.187.254)
0.123.188.*(0.123.188.0 - 0.123.188.254)
0.123.189.*(0.123.189.0 - 0.123.189.254)
0.123.190.*(0.123.190.0 - 0.123.190.254)
0.123.191.*(0.123.191.0 - 0.123.191.254)
0.123.192.*(0.123.192.0 - 0.123.192.254)
0.123.193.*(0.123.193.0 - 0.123.193.254)
0.123.194.*(0.123.194.0 - 0.123.194.254)
0.123.195.*(0.123.195.0 - 0.123.195.254)
0.123.196.*(0.123.196.0 - 0.123.196.254)
0.123.197.*(0.123.197.0 - 0.123.197.254)
0.123.198.*(0.123.198.0 - 0.123.198.254)
0.123.199.*(0.123.199.0 - 0.123.199.254)
0.123.200.*(0.123.200.0 - 0.123.200.254)
0.123.201.*(0.123.201.0 - 0.123.201.254)
0.123.202.*(0.123.202.0 - 0.123.202.254)
0.123.203.*(0.123.203.0 - 0.123.203.254)
0.123.204.*(0.123.204.0 - 0.123.204.254)
0.123.205.*(0.123.205.0 - 0.123.205.254)
0.123.206.*(0.123.206.0 - 0.123.206.254)
0.123.207.*(0.123.207.0 - 0.123.207.254)
0.123.208.*(0.123.208.0 - 0.123.208.254)
0.123.209.*(0.123.209.0 - 0.123.209.254)
0.123.210.*(0.123.210.0 - 0.123.210.254)
0.123.211.*(0.123.211.0 - 0.123.211.254)
0.123.212.*(0.123.212.0 - 0.123.212.254)
0.123.213.*(0.123.213.0 - 0.123.213.254)
0.123.214.*(0.123.214.0 - 0.123.214.254)
0.123.215.*(0.123.215.0 - 0.123.215.254)
0.123.216.*(0.123.216.0 - 0.123.216.254)
0.123.217.*(0.123.217.0 - 0.123.217.254)
0.123.218.*(0.123.218.0 - 0.123.218.254)
0.123.219.*(0.123.219.0 - 0.123.219.254)
0.123.220.*(0.123.220.0 - 0.123.220.254)
0.123.221.*(0.123.221.0 - 0.123.221.254)
0.123.222.*(0.123.222.0 - 0.123.222.254)
0.123.223.*(0.123.223.0 - 0.123.223.254)
0.123.224.*(0.123.224.0 - 0.123.224.254)
0.123.225.*(0.123.225.0 - 0.123.225.254)
0.123.226.*(0.123.226.0 - 0.123.226.254)
0.123.227.*(0.123.227.0 - 0.123.227.254)
0.123.228.*(0.123.228.0 - 0.123.228.254)
0.123.229.*(0.123.229.0 - 0.123.229.254)
0.123.230.*(0.123.230.0 - 0.123.230.254)
0.123.231.*(0.123.231.0 - 0.123.231.254)
0.123.232.*(0.123.232.0 - 0.123.232.254)
0.123.233.*(0.123.233.0 - 0.123.233.254)
0.123.234.*(0.123.234.0 - 0.123.234.254)
0.123.235.*(0.123.235.0 - 0.123.235.254)
0.123.236.*(0.123.236.0 - 0.123.236.254)
0.123.237.*(0.123.237.0 - 0.123.237.254)
0.123.238.*(0.123.238.0 - 0.123.238.254)
0.123.239.*(0.123.239.0 - 0.123.239.254)
0.123.240.*(0.123.240.0 - 0.123.240.254)
0.123.241.*(0.123.241.0 - 0.123.241.254)
0.123.242.*(0.123.242.0 - 0.123.242.254)
0.123.243.*(0.123.243.0 - 0.123.243.254)
0.123.244.*(0.123.244.0 - 0.123.244.254)
0.123.245.*(0.123.245.0 - 0.123.245.254)
0.123.246.*(0.123.246.0 - 0.123.246.254)
0.123.247.*(0.123.247.0 - 0.123.247.254)
0.123.248.*(0.123.248.0 - 0.123.248.254)
0.123.249.*(0.123.249.0 - 0.123.249.254)
0.123.250.*(0.123.250.0 - 0.123.250.254)
0.123.251.*(0.123.251.0 - 0.123.251.254)
0.123.252.*(0.123.252.0 - 0.123.252.254)
0.123.253.*(0.123.253.0 - 0.123.253.254)
0.123.254.*(0.123.254.0 - 0.123.254.254)
0.123.255.*(0.123.255.0 - 0.123.255.254)

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