Autonomous System

AS16643 Virginia Commonwealth University

EducationActiveUnited StatesARIN

AS16643 (VCU-ASN1) is an education network operated by Virginia Commonwealth University in United States, registered with ARIN. It has 4 IPv4 prefixes with 65,536 addresses, which makes it the 3,667th largest of 82,200 active autonomous systems by IPv4 space.

IPv4 addresses65,536in 4 prefixes
IPv6 prefixes0none
Size rank#3,667of 82,200 active ASNs
Abuser scoreVery Low0.01% of its addresses flagged · method

Details

OrganizationVirginia Commonwealth University
AS nameVCU-ASN1
Websitevcu.edu
Country United States (US)
Network typeEducation
RegistryARIN
Abuse contactjacraig@vcu.edu
Registered2000-05-30
Last updated2026-05-13

IPv4 prefixes

4 prefixes · 65,536 addresses
NetworkAddressesFirst – last address
128.172.0.0/1816,384128.172.0.0 – 128.172.63.255
128.172.64.0/1816,384128.172.64.0 – 128.172.127.255
128.172.128.0/1816,384128.172.128.0 – 128.172.191.255
128.172.192.0/1816,384128.172.192.0 – 128.172.255.255

IPv6 prefixes

No IPv6 prefixes.

Query AS16643 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=AS16643&key=YOUR_API_KEY"

Any address in its prefixes resolves to AS16643, with or without a key:

curl "https://api.ipapi.is/?q=128.172.0.1"

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