| CIDR | Anzahl der Adressen | IP-Adressbereich | Bemerkungen |
| /0 | 340.282.366.920.938.463.463.374.607.431.768.211.456 | xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx | Gesamter IPv6-Adressbereich |
| /1 | 170.141.183.460.469.231.731.687.303.715.884.105.728 | | |
| /2 | 85.070.591.730.234.615.865.843.651.857.942.052.864 | | |
| /3 | 42.535.295.865.117.307.932.921.825.928.971.026.432 | | Vorgesehener IPv6-Adressbereich für Unicast |
| /4 | 21.267.647.932.558.653.966.460.912.964.485.513.216 | 2xxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx | |
| /5 | 10.633.823.966.279.326.983.230.456.482.242.756.608 | | |
| /6 | 5.316.911.983.139.663.491.615.228.241.121.378.304 | | |
| /7 | 2.658.455.991.569.831.745.807.614.120.560.689.152 | | |
| /8 | 1.329.227.995.784.915.872.903.807.060.280.344.576 | 20xx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx | |
| /9 | 664.613.997.892.457.936.451.903.530.140.172.288 | | |
| /10 | 332.306.998.946.228.968.225.951.765.070.086.144 | | |
| /11 | 166.153.499.473.114.484.112.975.882.535.043.072 | | |
| /12 | 83.076.749.736.557.242.056.487.941.267.521.536 | 200x:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx | Größte Netzgröße für RIR-Assignments (RIPE, ARIN, LACNIC, APNIC, AfriNIC) |
| /13 | 41.538.374.868.278.621.028.243.970.633.760.768 | | |
| /14 | 20.769.187.434.139.310.514.121.985.316.880.384 | | |
| /15 | 10.384.593.717.069.655.257.060.992.658.440.192 | | |
| /16 | 5.192.296.858.534.827.628.530.496.329.220.096 | 2001:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx | |
| /17 | 2.596.148.429.267.413.814.265.248.164.610.048 | | |
| /18 | 1.298.074.214.633.706.907.132.624.082.305.024 | | |
| /19 | 649.037.107.316.853.453.566.312.041.152.512 | | |
| /20 | 324.518.553.658.426.726.783.156.020.576.256 | 2001:xxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx | |
| /21 | 162.280.286.840.214.464.602.688.010.288.128 | | |
| /22 | 81.129.638.414.606.681.695.789.005.144.064 | | |
| /23 | 40.564.819.207.303.340.847.894.502.572.032 | | Kleinste Netzgröße für RIR-Assignments (RIPE, ARIN, LACNIC, APNIC, AfriNIC) |
| /24 | 20.282.409.603.651.670.423.947.251.286.016 | 2001:xx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx | |
| /25 | 10.141.204.801.825.835.211.973.625.643.008 | | |
| /26 | 5.070.602.400.912.917.605.986.812.821.504 | | |
| /27 | 2.535.301.200.456.458.802.993.406.410.752 | | |
| /28 | 1.267.650.600.228.229.401.496.703.205.376 | 2001:x:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx | |
| /29 | 633.825.300.114.114.700.748.351.602.688 | | Maximale unbegründete Netzgröße für LIRs bei RIPE, ARIN, LACNIC, APNIC, AfriNIC |
| /30 | 316.912.650.057.057.350.374.175.801.344 | | |
| /31 | 158.456.325.028.528.675.187.087.900.672 | | |
| /32 | 79.228.162.514.264.337.593.543.950.336 | 2001::xxxx:xxxx:xxxx:xxxx:xxxx:xxxx | Kleinste Netzgröße für LIRs bei RIPE, ARIN, LACNIC, APNIC, AfriNIC |
| /33 | 39.614.081.257.132.168.796.771.975.168 | | |
| /34 | 19.807.040.628.566.084.398.385.987.584 | | |
| /35 | 9.903.520.314.283.042.199.192.993.792 | | |
| /36 | 4.951.760.157.141.521.099.596.496.896 | 2001::xxx:xxxx:xxxx:xxxx:xxxx:xxxx | |
| /37 | 2.475.880.078.570.760.549.798.248.448 | | |
| /38 | 1.237.940.039.285.380.274.899.124.224 | | |
| /39 | 618.970.019.642.690.137.449.562.112 | | |
| /40 | 309.485.009.821.345.068.724.781.056 | 2001::xx:xxxx:xxxx:xxxx:xxxx:xxxx | |
| /41 | 154.742.504.910.672.534.362.390.528 | | |
| /42 | 77.371.252.455.336.267.181.195.264 | | |
| /43 | 38.685.626.227.668.133.590.597.632 | | |
| /44 | 19.342.813.113.834.066.795.298.816 | 2001::x:xxxx:xxxx:xxxx:xxxx:xxxx | |
| /45 | 9.671.406.556.917.033.397.649.408 | | |
| /46 | 4.835.703.278.458.516.698.824.704 | | |
| /47 | 2.417.851.639.229.258.349.412.352 | | |
| /48 | 1.208.925.819.614.629.174.706.176 | 2001::xxxx:xxxx:xxxx:xxxx:xxxx | Kleinste Netzgröße für Endbenutzer bei RIPE, ARIN, LACNIC, APNIC, AfriNIC |
| /49 | 604.462.909.807.314.587.353.088 | | |
| /50 | 302.231.454.903.657.293.676.544 | | |
| /51 | 151.115.727.451.828.646.838.272 | | |
| /52 | 75.557.863.725.914.323.419.136 | 2001::xxx:xxxx:xxxx:xxxx:xxxx | |
| /53 | 37.778.931.862.957.161.709.568 | | |
| /54 | 18.889.465.931.478.580.854.784 | | |
| /55 | 9.444.732.965.739.290.427.392 | | |
| /56 | 4.722.366.482.869.645.213.696 | 2001::xx:xxxx:xxxx:xxxx:xxxx | Netzgröße zur Ermittlung der Effizienz, möglich für Heim-Netzwerke |
| /57 | 2.361.183.241.434.822.606.848 | | |
| /58 | 1.180.591.620.717.411.303.424 | | |
| /59 | 590.295.810.358.705.651.712 | | |
| /60 | 295.147.905.179.352.825.856 | 2001::x:xxxx:xxxx:xxxx:xxxx | |
| /61 | 147.573.952.589.676.412.928 | | |
| /62 | 73.786.976.294.838.206.464 | | |
| /63 | 36.893.488.147.419.103.232 | | |
| /64 | 18.446.744.073.709.551.616 | 2001::xxxx:xxxx:xxxx:xxxx | Kleinstes empfohlenes einzelnes reales Netz (z.B. mit EUI-64) |
| /65 | 9.223.372.036.854.775.808 | | |
| /66 | 4.611.686.018.427.387.904 | | |
| /67 | 2.305.843.009.213.693.952 | | |
| /68 | 1.152.921.504.606.846.976 | 2001::xxx:xxxx:xxxx:xxxx | |
| /69 | 576.460.752.303.423.488 | | |
| /70 | 288.230.376.151.711.744 | | |
| /71 | 144.115.188.075.855.872 | | |
| /72 | 72.057.594.037.927.936 | 2001::xx:xxxx:xxxx:xxxx | |
| /73 | 36.028.797.018.963.968 | | |
| /74 | 18.014.398.509.481.984 | | |
| /75 | 9.007.199.254.740.992 | | |
| /76 | 4.503.599.627.370.496 | 2001::x:xxxx:xxxx:xxxx | |
| /77 | 2.251.799.813.685.248 | | |
| /78 | 1.125.899.906.842.624 | | |
| /79 | 562.949.953.421.312 | | |
| /80 | 281.474.976.710.656 | 2001::xxxx:xxxx:xxxx | |
| /81 | 140.737.488.355.328 | | |
| /82 | 70.368.744.177.664 | | |
| /83 | 35.184.372.088.832 | | |
| /84 | 17.592.186.044.416 | 2001::xxx:xxxx:xxxx | |
| /85 | 8.796.093.022.208 | | |
| /86 | 4.398.046.511.104 | | |
| /87 | 2.199.023.255.552 | | |
| /88 | 1.099.511.627.776 | 2001::xx:xxxx:xxxx | |
| /89 | 549.755.813.888 | | |
| /90 | 274.877.906.944 | | |
| /91 | 137.438.953.472 | | |
| /92 | 68.719.476.736 | 2001::x:xxxx:xxxx | |
| /93 | 34.359.738.368 | | |
| /94 | 17.179.869.184 | | |
| /95 | 8.589.934.592 | | |
| /96 | 4.294.967.296 | 2001::xxxx:xxxx | Entspricht dem gesamten IPv4-Adressbereich |
| /97 | 2.147.483.648 | | Entspricht sämtlichen IPv4-Adressen aller Class A-Netze |
| /98 | 1.073.741.824 | | Entspricht sämtlichen IPv4-Adressen aller Class B-Netze |
| /99 | 536.870.912 | | Entspricht sämtlichen IPv4-Adressen aller Class C-Netze |
| /100 | 268.435.456 | 2001::xxx:xxxx | Entspricht sämtlichen IPv4-Adressen aller Class D- bzw. E-Netze |
| /101 | 134.217.728 | | |
| /102 | 67.108.864 | | |
| /103 | 33.554.432 | | |
| /104 | 16.777.216 | 2001::xx:xxxx | Entspricht IPv4 /8 (Class A) |
| /105 | 8.388.608 | | Entspricht IPv4 /9 |
| /106 | 4.194.304 | | Entspricht IPv4 /10 |
| /107 | 2.097.152 | | Entspricht IPv4 /11 |
| /108 | 1.048.576 | 2001::x:xxxx | Entspricht IPv4 /12 |
| /109 | 524.288 | | Entspricht IPv4 /13 |
| /110 | 262.144 | | Entspricht IPv4 /14 |
| /111 | 131.072 | | Entspricht IPv4 /15 |
| /112 | 65.536 | 2001::xxxx | Entspricht IPv4 /16 (Class B) |
| /113 | 32.768 | | Entspricht IPv4 /17 |
| /114 | 16.384 | | Entspricht IPv4 /18 |
| /115 | 8.192 | | Entspricht IPv4 /19 |
| /116 | 4.096 | 2001::xxx | Entspricht IPv4 /20 |
| /117 | 2.048 | | Entspricht IPv4 /21 |
| /118 | 1.024 | | Entspricht IPv4 /22 |
| /119 | 512 | | Entspricht IPv4 /23 |
| /120 | 256 | 2001::xx | Entspricht IPv4 /24 (Class C) |
| /121 | 128 | | Entspricht IPv4 /25 |
| /122 | 64 | | Entspricht IPv4 /26 |
| /123 | 32 | | Entspricht IPv4 /27 |
| /124 | 16 | 2001::x | Entspricht IPv4 /28 |
| /125 | 8 | | Entspricht IPv4 /29 |
| /126 | 4 | | Entspricht IPv4 /30 |
| /127 | 2 | | Entspricht IPv4 /31, gängig für Inter-Router-Verbindungen |
| /128 | 1 | | Entspricht IPv4 /32, einzelne IPv6-Adresse |
