AS12145 — COLORADOSTATEUNIV
AS12145 announces 7 IPv4 prefixes covering 81,664 addresses and 0 IPv6 prefixes.
About this network
The campus network of Colorado State University in Fort Collins, which also carries the address space of the regional research network CSU operates.
What it's used for
- Campus networking for teaching and research, plus the aggregation point for a research network serving institutions across the region.
Notable
- The announcements split cleanly in two. 129.82.0.0/16 is registered as CSUNET and is the campus itself. The six smaller prefixes out of 129.19 all carry the netname CSU-FRGP-19 — FRGP is the Front Range GigaPop, the Colorado research network CSU runs, which connects universities, federal labs and other research bodies in Colorado and Wyoming onward to the national research backbone.
- Six observed BGP neighbours for 81,000 addresses. Modest for a network with a regional aggregation role, but a gigapop's members mostly appear behind it rather than as separate BGP adjacencies at this level.
- No IPv6 announced.
Interesting
- The gigapop model is a piece of 1990s research-networking design that never went away. A university takes on the job of hauling traffic for everyone else in its region, which is why a state school's AS ends up holding address space that has nothing to do with its own campus.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.
Announced prefixes
- 129.19.0.0/22
- 129.19.4.0/23
- 129.19.7.0/24
- 129.19.8.0/21
- 129.19.16.0/20
- 129.19.32.0/19
- 129.82.0.0/16
Upstream networks
- AS14041 University Corporation for Atmospheric Research
Downstream networks
- AS394748 City of Fort Collins
- AS54669 Larimer County Government
- AS31991 Platte River Power Authority
- AS54060 Poudre School District R-1
- AS25825 Poudre Valley Health Care, Inc.
Adjacent networks
BGP / ASN / CIDR
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IPv4
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IPv6
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IPv4 Prefixes
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IPv6 Prefixes
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Total Prefixes
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Unique /24s
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⚠ SUSPICIOUS PREFIX ANNOUNCEMENTS DETECTED