Autonomous System

AS5723 Johns Hopkins University

EducationActiveUnited StatesARIN

AS5723 (JHU) is an education network operated by Johns Hopkins University in United States, registered with ARIN. It has 8 IPv4 prefixes with 135,936 addresses and 1 IPv6 prefix, which makes it the 1,747th largest of 82,141 active autonomous systems by IPv4 space.

IPv4 addresses135,936in 8 prefixes
IPv6 prefixes1≈ 7.9 × 10²⁸ addresses
Size rank#1,747of 82,141 active ASNs
Abuser scoreVery Low0.01% of its addresses flagged · method

Details

OrganizationJohns Hopkins University
AS nameJHU
Websitejhu.edu
Country United States (US)
Network typeEducation
RegistryARIN
Abuse contactnoc@jhu.edu
Registered1995-09-06
Last updated2020-09-08

IPv4 prefixes

8 prefixes · 135,936 addresses
NetworkAddressesFirst – last address
128.220.0.0/1665,536128.220.0.0 – 128.220.255.255
162.129.0.0/1665,536162.129.0.0 – 162.129.255.255
198.57.32.0/212,048198.57.32.0 – 198.57.39.255
198.57.40.0/221,024198.57.40.0 – 198.57.43.255
204.124.184.0/221,024204.124.184.0 – 204.124.187.255
192.12.13.0/24256192.12.13.0 – 192.12.13.255
192.12.14.0/24256192.12.14.0 – 192.12.14.255
198.57.39.0/24256198.57.39.0 – 198.57.39.255

IPv6 prefixes

1 prefix
  • 2606:2b00::/32

Query AS5723 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=AS5723&key=YOUR_API_KEY"

Any address in its prefixes resolves to AS5723, with or without a key:

curl "https://api.ipapi.is/?q=128.220.0.1"

Largest networks in United States

AS749 United States Department of Defense (DoD)227,398,912 IPv4 addressesAS16509 Amazon.com, Inc.217,931,264 IPv4 addressesAS7018 AT&T Enterprises, LLC117,261,568 IPv4 addressesAS8075 Microsoft Corporation81,468,160 IPv4 addressesAS721 United States Department of Defense (DoD)72,922,368 IPv4 addressesAS7922 Comcast Cable Communications, LLC68,336,896 IPv4 addresses