206208 looking glass

AS104 University of Colorado at Boulder 🇺🇸 US

Announcing 25 prefixes, seen at the RIS collectors.

IPv4 prefixes
21
95,232 (372 × /24)
IPv6 prefixes
4
1 × /32
Upstreams
3
transit providers observed
Peers
0
settlement-free adjacencies
Downstreams
0
transit customers observed
Customer cone
0
ASes reachable through it

Registry and operator data

AS number
AS104
Name
University of Colorado at Boulder
Organisation
University of Colorado at Boulder
Country
🇺🇸 US
RIR
ARIN
Allocated
1987-04-09
Scope
Not Disclosed
Peering policy
Open
PeeringDB
net/21260

RPKI coverage of this AS

Its own announcements, validated against the current ROA set

3 valid (12.0%) 2 invalid (8.0%) 20 no ROA (80.0%)

Announced prefixes

21 in total

Prefix RPKI Peers Sample path First seen
128.138.0.0/16 v4 no ROA 44 35493356104 2026-09-18
129.19.192.0/18 v4 RPKI valid 44 35493356104 2026-09-18
129.19.240.0/20 v4 RPKI valid 44 377213356104 2026-09-18
146.5.20.0/22 v4 no ROA 43 35493356104 2026-09-18
192.12.238.0/24 v4 no ROA 43 35493356104 2026-09-18
192.12.240.0/24 v4 no ROA 43 35493356104 2026-09-18
192.12.241.0/24 v4 no ROA 43 35493356104 2026-09-18
192.12.242.0/24 v4 no ROA 43 35493356104 2026-09-18
192.12.244.0/24 v4 no ROA 43 35493356104 2026-09-18
192.12.245.0/24 v4 no ROA 43 35493356104 2026-09-18
198.11.16.0/20 v4 no ROA 44 35493356104 2026-09-18
198.59.7.0/24 v4 no ROA 43 35493356104 2026-09-18
198.59.51.0/24 v4 no ROA 43 35493356104 2026-09-18
198.59.52.0/24 v4 no ROA 43 35493356104 2026-09-18
198.59.54.0/24 v4 no ROA 43 35493356104 2026-09-18
198.59.55.0/24 v4 no ROA 43 35493356104 2026-09-18
198.59.70.0/24 v4 no ROA 43 35493356104 2026-09-18
198.59.81.0/24 v4 no ROA 43 35493356104 2026-09-18
198.59.82.0/24 v4 no ROA 43 35493356104 2026-09-18
198.59.83.0/24 v4 no ROA 43 35493356104 2026-09-18
204.228.80.0/24 v4 no ROA 43 377213356104 2026-09-18