ip段數(shù)字釋疑

1、首先來了解一下二進(jìn)制的轉(zhuǎn)換知識：二進(jìn)制數(shù)轉(zhuǎn)換成十進(jìn)制數(shù)二進(jìn)制的1101轉(zhuǎn)化成十進(jìn)制1101（2）=1*20+0*21+1*22+1*23=1+0+4+8=13轉(zhuǎn)化成十進(jìn)制要從右到左用二進(jìn)制的每個數(shù)去乘以2的相應(yīng)次方不過次方要從0開始相反 用十進(jìn)制的13除以2 每除一下將余數(shù)就記在旁邊最后按余數(shù)從下向上排列就可得到1101十進(jìn)制轉(zhuǎn)二進(jìn)制：用2輾轉(zhuǎn)相除至結(jié)果為1將余數(shù)和最后的1從下向上倒序?qū)?就是結(jié)果例如302302/2 = 151 余0151/2 = 75 余175/2 = 37 余137/2 = 18 余118/2 = 9 余09/2 = 4 余14/2 = 2 余02/2 = 1 余01/2

2、 = 0 余1故二進(jìn)制為100101110子網(wǎng)掩碼的前綴表示法！ 11111111 11111111 1111111 00000000 24個1組成 轉(zhuǎn)成成十進(jìn)制等于 255.255.255.0 11111111 11111111 1111111 11111100 30個1組成 轉(zhuǎn)成成十進(jìn)制等于 255.255.255.252 我們租用服務(wù)器/vps的時候，買多個IP地址，機房總是發(fā)一個類似 10.0.0.1/29 或 10.0.0.1/28 或 10.0.0.1/30 或 10.0.0.1/27 的地址給我們，對于不熟悉網(wǎng)絡(luò)的人來說，真的莫名其妙。到底有哪些可用的IP？ 網(wǎng)關(guān),子網(wǎng)掩碼，廣播

3、地址是什么？為了方便大家，本文章提供了 可用IP查詢，ip段/27 /29 /30 網(wǎng)關(guān),子網(wǎng)掩碼，推薦精選廣播地址查詢可用IP查詢,IP段對應(yīng)表IP總數(shù)子網(wǎng)掩碼C段個數(shù)/304255.255.255.2521/64/298255.255.255.2481/32/2816255.255.255.2401/16/2732255.255.255.2241/8/2664255.255.255.1921/4/24256255.255.255.01/23512255.255.254.02/221024255.255.252.04/212048255.255.248.08/204096255.255.24

4、0.016/198192255.255.224.032/1816384255.255.192.064/1732768255.255.128.0128/1665536255.255.0.0256ip段/24 /25 /26 /27 /28 /29 /30網(wǎng)關(guān),子網(wǎng)掩碼，廣播地址查詢范例： 要查詢204.45.116.184/29，先找到下表的 /29 表格，網(wǎng)關(guān) 這一列找到要查詢的IP最后一位即.184，然后就可以看到可用IP范圍（注:第一個IP是Gateway網(wǎng)關(guān)地址）和廣播地址了。然后從上面的表找到 子網(wǎng)掩碼即可。/25 - 2 Subnets - 126 Hosts/Subnet網(wǎng)絡(luò)地址可

5、用IP范圍廣播地址.0.1-.126.127/24 -1 Subnets -254 Hosts/Subnet代表一整個C段網(wǎng)絡(luò)地址可用IP范圍廣播地址推薦精選.128.129-.254.255.0.1-.254.255/30 - 64 Subnets - 2 Hosts/Subnet網(wǎng)絡(luò)地址可用IP范圍廣播地址.0.1-.2.3.4.5-.6.7.8.9-.10.11.12.13-.14.15.16.17-.18.19.20.21-.22.23.24.25-.26.27.28.29-.30.31.32.33-.34.35.36.37-.38.39.40.41-.42.43.44.45-.46.

6、47.48.49-.50.51.52.53-.54.55.56.57-.58.59.60.61-.62.63.64.65-.66.67.68.69-.70.71.72.73-.74.75.76.77-.78.79.80.81-.82.83.84.85-.86.87.88.89-.90.91.92.93-.94.95.96.97-.98.99推薦精選.100.101-.102.103.104.105-.106.107.108.109-.110.111.112.113-.114.115.116.117-.118.119.120.121-.122.123.124.125-.126.127.128.1

7、29-.130.131.132.133-.134.135.136.137-.138.139.140.141-.142.143.144.145-.146.147.148.149-.150.151.152.153-.154.155.156.157-.158.159.160.161-.162.163.164.165-.166.167.168.169-.170.171.172.173-.174.175.176.177-.178.179.180.181-.182.183.184.185-.186.187.188.189-.190.191.192.193-.194.195.196.197-.198.199

8、.200.201-.202.203.204.205-.206.207.208.209-.210.211.212.213-.214.215推薦精選.216.217-.218.219.220.221-.222.223.224.225-.226.227.228.229-.230.231.232.233-.234.235.236.237-.238.239.240.241-.242.243.244.245-.246.247.248.249-.250.251.252.253-.254.255/26 - 4 Subnets - 62 Hosts/Subnet網(wǎng)絡(luò)地址可用IP范圍廣播地址.0.1-.62.63

9、.64.65-.126.127.128.129-.190.191.192.193-.254.255/27 - 8 Subnets - 30 Hosts/Subnet網(wǎng)絡(luò)地址可用IP范圍廣播地址.0.1-.30.31.32.33-.62.63.64.65-.94.95.96.97-.126.127.128.129-.158.159.160.161-.190.191.192.193-.222.223.224.225-.254.255/28 - 16 Subnets - 14 Hosts/Subnet網(wǎng)絡(luò)地址可用IP范圍廣播地址.0.1-.14.15.16.17-.30.31.32.33-.46.4

10、7.48.49-.62.63.64.65-.78.79.80.81-.94.95.96.97-.110.111.112.113-.126.127.128.129-.142.143.144.145-.158.159.160.161-.174.175.176.177-.190.191.192.193-.206.207.208.209-.222.223.224.225-.238.239.240.241-.254.255/29 - 32 Subnets - 6 Hosts/Subnet網(wǎng)絡(luò)地址可用IP范圍廣播地址.0.1-.6.7.8.9-.14.15.16.17-.22.23.24.25-.30.3

11、1.32.33-.38.39.40.41-.46.47.48.49-.54.55.56.57-.62.63.64.65-.70.71.72.73-.78.79.80.81-.86.87.88.89-.94.95.96.97-.102.103.104.105-.110.111.112.113-.118.119.120.121-.126.127.128.129-.134.135.136.137-.142.143.144.145-.150.151.152.153-.158.159.160.161-.166.167.168.169-.174.175.176.177-.182.183.184.185-.