Autonomous System

AS23237 McMaster University

EducationActiveCanadaARIN

AS23237 (MCMASTER) is an education network operated by McMaster University in Canada, registered with ARIN. It has 4 IPv4 prefixes with 66,304 addresses and 1 IPv6 prefix, which makes it the 3,339th largest of 82,200 active autonomous systems by IPv4 space.

IPv4 addresses66,304in 4 prefixes
IPv6 prefixes1≈ 1.2 × 10²⁴ addresses
Size rank#3,339of 82,200 active ASNs
Abuser scoreVery Low0.03% of its addresses flagged · method

Details

OrganizationMcMaster University
AS nameMCMASTER
Websitemcmaster.ca
Country Canada (CA)
Network typeEducation
RegistryARIN
Abuse contactmike.diggins@mcmaster.ca
Registered2002-02-13
Last updated2012-03-02

IPv4 prefixes

4 prefixes · 66,304 addresses
NetworkAddressesFirst – last address
130.113.0.0/1665,536130.113.0.0 – 130.113.255.255
130.113.109.0/24256130.113.109.0 – 130.113.109.255
192.42.5.0/24256192.42.5.0 – 192.42.5.255
192.42.6.0/24256192.42.6.0 – 192.42.6.255

IPv6 prefixes

1 prefix
  • 2604:1700::/48

Query AS23237 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=AS23237&key=YOUR_API_KEY"

Any address in its prefixes resolves to AS23237, with or without a key:

curl "https://api.ipapi.is/?q=130.113.0.1"

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