Autonomous System
AS1742 Harvard University
EducationActiveUnited StatesARIN
AS1742 (HARVARD-UNIV) is an education network operated by Harvard University in United States, registered with ARIN. It has 13 IPv4 prefixes with 204,544 addresses and 4 IPv6 prefixes, which makes it the 1,271st largest of 82,200 active autonomous systems by IPv4 space.
IPv4 addresses204,544in 13 prefixes
IPv6 prefixes4≈ 8.4 × 10²⁸ addresses
Size rank#1,271of 82,200 active ASNs
Details
OrganizationHarvard University
AS nameHARVARD-UNIV
Websiteharvard.edu
Country United States (US)
Network typeEducation
RegistryARIN
Abuse contactabuse@harvard.edu
Registered1992-02-19
Last updated2023-12-21
IPv4 prefixes
13 prefixes · 204,544 addresses| Network | Addresses | First – last address |
|---|---|---|
| 128.103.0.0/16 | 65,536 | 128.103.0.0 – 128.103.255.255 |
| 131.142.0.0/16 | 65,536 | 131.142.0.0 – 131.142.255.255 |
| 140.247.0.0/16 | 65,536 | 140.247.0.0 – 140.247.255.255 |
| 65.112.0.0/20 | 4,096 | 65.112.0.0 – 65.112.15.255 |
| 67.134.204.0/22 | 1,024 | 67.134.204.0 – 67.134.207.255 |
| 199.94.60.0/22 | 1,024 | 199.94.60.0 – 199.94.63.255 |
| 140.247.111.0/24 | 256 | 140.247.111.0 – 140.247.111.255 |
| 140.247.152.0/24 | 256 | 140.247.152.0 – 140.247.152.255 |
| 140.247.174.0/24 | 256 | 140.247.174.0 – 140.247.174.255 |
| 140.247.236.0/24 | 256 | 140.247.236.0 – 140.247.236.255 |
| 192.5.66.0/24 | 256 | 192.5.66.0 – 192.5.66.255 |
| 192.54.223.0/24 | 256 | 192.54.223.0 – 192.54.223.255 |
| 192.131.102.0/24 | 256 | 192.131.102.0 – 192.131.102.255 |
128.103.0.0/16 131.142.0.0/16 140.247.0.0/16 65.112.0.0/20 67.134.204.0/22 199.94.60.0/22 140.247.111.0/24 140.247.152.0/24 140.247.174.0/24 140.247.236.0/24 192.5.66.0/24 192.54.223.0/24 192.131.102.0/24
IPv6 prefixes
4 prefixes- 2607:fb60::/32
- 2602:fca9::/36
- 2607:fb60:2404::/46
- 2620:32:8000::/48
2607:fb60::/32 2602:fca9::/36 2607:fb60:2404::/46 2620:32:8000::/48
Query AS1742 with the API
The ASN lookup returns everything on this page as JSON, including every prefix. ASN lookups need an API key: a free account comes with 1,000 requests a day.
curl "https://api.ipapi.is/?q=AS1742&key=YOUR_API_KEY"Any address in its prefixes resolves to AS1742, with or without a key:
curl "https://api.ipapi.is/?q=128.103.0.1"Other networks of Harvard University
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