Autonomous System
AS16519 University of Colorado Denver
EducationActiveUnited StatesARIN
AS16519 (CUDENVER) is an education network operated by University of Colorado Denver in United States, registered with ARIN. It has 2 IPv4 prefixes with 131,072 addresses and 1 IPv6 prefix, which makes it the 1,934th largest of 82,200 active autonomous systems by IPv4 space.
IPv4 addresses131,072in 2 prefixes
IPv6 prefixes1≈ 3.1 × 10²⁶ addresses
Size rank#1,934of 82,200 active ASNs
Details
OrganizationUniversity of Colorado Denver
AS nameCUDENVER
Websiteucdenver.edu
Country United States (US)
Network typeEducation
RegistryARIN
Abuse contactpiotr.artwich@ucdenver.edu
Registered2000-05-05
Last updated2026-01-07
IPv4 prefixes
2 prefixes · 131,072 addresses| Network | Addresses | First – last address |
|---|---|---|
| 132.194.0.0/16 | 65,536 | 132.194.0.0 – 132.194.255.255 |
| 140.226.0.0/16 | 65,536 | 140.226.0.0 – 140.226.255.255 |
132.194.0.0/16 140.226.0.0/16
IPv6 prefixes
1 prefix- 2620:123:5000::/40
2620:123:5000::/40
Query AS16519 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=AS16519&key=YOUR_API_KEY"Any address in its prefixes resolves to AS16519, with or without a key:
curl "https://api.ipapi.is/?q=132.194.0.1"Largest networks in United States
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