AS1742 Harvard University
General Info - AS1742
203,520
84.18 Octillion
IP Address Ranges
| Netblock | From IP | To IP | Number of IPs | |
|---|---|---|---|---|
| 65.112.0.0/20 | 65.112.0.0 | 65.112.15.255 | 4,096 | |
| 67.134.204.0/22 | 67.134.204.0 | 67.134.207.255 | 1,024 | |
| 128.103.0.0/16 | 128.103.0.0 | 128.103.255.255 | 65,536 | |
| 131.142.0.0/16 | 131.142.0.0 | 131.142.255.255 | 65,536 | |
| 140.247.0.0/18 | 140.247.0.0 | 140.247.63.255 | 16,384 | |
| 140.247.64.0/19 | 140.247.64.0 | 140.247.95.255 | 8,192 | |
| 140.247.96.0/21 | 140.247.96.0 | 140.247.103.255 | 2,048 | |
| 140.247.104.0/22 | 140.247.104.0 | 140.247.107.255 | 1,024 | |
| 140.247.108.0/23 | 140.247.108.0 | 140.247.109.255 | 512 | |
| 140.247.110.0/24 | 140.247.110.0 | 140.247.110.255 | 256 | |
| 140.247.111.0/24 | 140.247.111.0 | 140.247.111.255 | 256 | |
| 140.247.112.0/20 | 140.247.112.0 | 140.247.127.255 | 4,096 | |
| 140.247.128.0/20 | 140.247.128.0 | 140.247.143.255 | 4,096 | |
| 140.247.144.0/21 | 140.247.144.0 | 140.247.151.255 | 2,048 | |
| 140.247.152.0/24 | 140.247.152.0 | 140.247.152.255 | 256 | |
| 140.247.153.0/24 | 140.247.153.0 | 140.247.153.255 | 256 | |
| 140.247.154.0/23 | 140.247.154.0 | 140.247.155.255 | 512 | |
| 140.247.156.0/22 | 140.247.156.0 | 140.247.159.255 | 1,024 | |
| 140.247.160.0/21 | 140.247.160.0 | 140.247.167.255 | 2,048 | |
| 140.247.168.0/22 | 140.247.168.0 | 140.247.171.255 | 1,024 | |
| 140.247.172.0/23 | 140.247.172.0 | 140.247.173.255 | 512 | |
| 140.247.174.0/24 | 140.247.174.0 | 140.247.174.255 | 256 | |
| 140.247.175.0/24 | 140.247.175.0 | 140.247.175.255 | 256 | |
| 140.247.176.0/23 | 140.247.176.0 | 140.247.177.255 | 512 | |
| 140.247.178.0/24 | 140.247.178.0 | 140.247.178.255 | 256 | |
| 140.247.179.0/25 | 140.247.179.0 | 140.247.179.127 | 128 | |
| 140.247.179.128/26 | 140.247.179.128 | 140.247.179.191 | 64 | |
| 140.247.179.192/26 | 140.247.179.192 | 140.247.179.255 | 64 | |
| 140.247.180.0/22 | 140.247.180.0 | 140.247.183.255 | 1,024 | |
| 140.247.184.0/21 | 140.247.184.0 | 140.247.191.255 | 2,048 | |
| 140.247.192.0/19 | 140.247.192.0 | 140.247.223.255 | 8,192 | |
| 140.247.224.0/21 | 140.247.224.0 | 140.247.231.255 | 2,048 | |
| 140.247.232.0/22 | 140.247.232.0 | 140.247.235.255 | 1,024 | |
| 140.247.236.0/24 | 140.247.236.0 | 140.247.236.255 | 256 | |
| 140.247.237.0/24 | 140.247.237.0 | 140.247.237.255 | 256 | |
| 140.247.238.0/23 | 140.247.238.0 | 140.247.239.255 | 512 | |
| 140.247.240.0/20 | 140.247.240.0 | 140.247.255.255 | 4,096 | |
| 192.5.66.0/24 | 192.5.66.0 | 192.5.66.255 | 256 | |
| 192.54.223.0/24 | 192.54.223.0 | 192.54.223.255 | 256 | |
| 192.131.102.0/24 | 192.131.102.0 | 192.131.102.255 | 256 | |
| 199.94.60.0/22 | 199.94.60.0 | 199.94.63.255 | 1,024 |
| Netblock | From IP | To IP | Number of IPs | |
|---|---|---|---|---|
| 2602:fca9::/36 | 2602:fca9:: | 2602:fca9:fff:ffff:ffff:ffff:ffff:ffff | 4.95 Octillion | |
| 2607:fb60::/35 | 2607:fb60:: | 2607:fb60:1fff:ffff:ffff:ffff:ffff:ffff | 9.90 Octillion | |
| 2607:fb60:2000::/38 | 2607:fb60:2000:: | 2607:fb60:23ff:ffff:ffff:ffff:ffff:ffff | 1.24 Octillion | |
| 2607:fb60:2400::/46 | 2607:fb60:2400:: | 2607:fb60:2403:ffff:ffff:ffff:ffff:ffff | 4.84 Septillion | |
| 2607:fb60:2404::/46 | 2607:fb60:2404:: | 2607:fb60:2407:ffff:ffff:ffff:ffff:ffff | 4.84 Septillion | |
| 2607:fb60:2408::/45 | 2607:fb60:2408:: | 2607:fb60:240f:ffff:ffff:ffff:ffff:ffff | 9.67 Septillion | |
| 2607:fb60:2410::/44 | 2607:fb60:2410:: | 2607:fb60:241f:ffff:ffff:ffff:ffff:ffff | 19.34 Septillion | |
| 2607:fb60:2420::/43 | 2607:fb60:2420:: | 2607:fb60:243f:ffff:ffff:ffff:ffff:ffff | 38.69 Septillion | |
| 2607:fb60:2440::/42 | 2607:fb60:2440:: | 2607:fb60:247f:ffff:ffff:ffff:ffff:ffff | 77.37 Septillion | |
| 2607:fb60:2480::/41 | 2607:fb60:2480:: | 2607:fb60:24ff:ffff:ffff:ffff:ffff:ffff | 154.74 Septillion | |
| 2607:fb60:2500::/40 | 2607:fb60:2500:: | 2607:fb60:25ff:ffff:ffff:ffff:ffff:ffff | 309.49 Septillion | |
| 2607:fb60:2600::/39 | 2607:fb60:2600:: | 2607:fb60:27ff:ffff:ffff:ffff:ffff:ffff | 618.97 Septillion | |
| 2607:fb60:2800::/37 | 2607:fb60:2800:: | 2607:fb60:2fff:ffff:ffff:ffff:ffff:ffff | 2.48 Octillion | |
| 2607:fb60:3000::/36 | 2607:fb60:3000:: | 2607:fb60:3fff:ffff:ffff:ffff:ffff:ffff | 4.95 Octillion | |
| 2607:fb60:4000::/34 | 2607:fb60:4000:: | 2607:fb60:7fff:ffff:ffff:ffff:ffff:ffff | 19.81 Octillion | |
| 2607:fb60:8000::/33 | 2607:fb60:8000:: | 2607:fb60:ffff:ffff:ffff:ffff:ffff:ffff | 39.61 Octillion | |
| 2620:32:8000::/48 | 2620:32:8000:: | 2620:32:8000:ffff:ffff:ffff:ffff:ffff | 1.21 Septillion |
What is an Autonomous System (AS)?
An Autonomous System (AS) is a collection of connected networks that operate under a common administrative domain and share routing policies. Each AS is identified by a unique Autonomous System Number (ASN), which is used to exchange routing information with other ASs. AS can control how traffic flows through networks and then filter out unwanted traffic.
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