Autonomous System

AS103 Northwestern University

EducationActiveUnited StatesARIN

AS103 (NWU-AS) is an education network operated by Northwestern University in United States, registered with ARIN. It has 27 IPv4 prefixes with 150,784 addresses and 1 IPv6 prefix, which makes it the 1,573rd largest of 82,200 active autonomous systems by IPv4 space.

IPv4 addresses150,784in 27 prefixes
IPv6 prefixes1≈ 1.5 × 10²⁶ addresses
Size rank#1,573of 82,200 active ASNs
Abuser scoreVery Low0.01% of its addresses flagged · method

Details

OrganizationNorthwestern University
AS nameNWU-AS
Websitenorthwestern.edu
Country United States (US)
Network typeEducation
RegistryARIN
Abuse contactsecurity@northwestern.edu
Registered1987-04-09
Last updated2012-04-02

IPv4 prefixes

27 prefixes · 150,784 addresses
NetworkAddressesFirst – last address
129.105.0.0/1665,536129.105.0.0 – 129.105.255.255
165.124.0.0/1732,768165.124.0.0 – 165.124.127.255
199.74.64.0/1816,384199.74.64.0 – 199.74.127.255
165.124.128.0/198,192165.124.128.0 – 165.124.159.255
165.124.192.0/198,192165.124.192.0 – 165.124.223.255
165.124.160.0/204,096165.124.160.0 – 165.124.175.255
165.124.240.0/204,096165.124.240.0 – 165.124.255.255
165.124.176.0/212,048165.124.176.0 – 165.124.183.255
165.124.224.0/212,048165.124.224.0 – 165.124.231.255
8.30.248.0/221,0248.30.248.0 – 8.30.251.255
165.124.232.0/221,024165.124.232.0 – 165.124.235.255
8.28.178.0/235128.28.178.0 – 8.28.179.255
165.124.184.0/23512165.124.184.0 – 165.124.185.255
192.26.86.0/23512192.26.86.0 – 192.26.87.255
199.249.166.0/23512199.249.166.0 – 199.249.167.255
199.249.168.0/23512199.249.168.0 – 199.249.169.255
38.124.97.0/2425638.124.97.0 – 38.124.97.255
165.124.17.0/24256165.124.17.0 – 165.124.17.255
165.124.186.0/24256165.124.186.0 – 165.124.186.255
192.5.143.0/24256192.5.143.0 – 192.5.143.255
192.26.85.0/24256192.26.85.0 – 192.26.85.255
192.31.253.0/24256192.31.253.0 – 192.31.253.255
199.249.165.0/24256199.249.165.0 – 199.249.165.255
199.249.166.0/24256199.249.166.0 – 199.249.166.255
199.249.167.0/24256199.249.167.0 – 199.249.167.255
The 25 largest of 27. The API and the database have all of them.

IPv6 prefixes

1 prefix
  • 2620:10d:2000::/41

Query AS103 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=AS103&key=YOUR_API_KEY"

Any address in its prefixes resolves to AS103, with or without a key:

curl "https://api.ipapi.is/?q=129.105.0.1"

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