AS25979 CITY OF MADISON 🇺🇸 US
Announcing 2 prefixes, seen at the RIS collectors.
IPv4 prefixes
1
4,096 (16 × /24)
IPv6 prefixes
1
1 × /48
Upstreams
1
transit providers observed
Peers
0
settlement-free adjacencies
Downstreams
1
transit customers observed
Customer cone
2
ASes reachable through it
Registry and operator data
- AS number
- AS25979
- Name
- CITY OF MADISON
- Organisation
- CITY OF MADISON
- Country
- 🇺🇸 US
- RIR
- ARIN
- Allocated
- 2002-06-11
RPKI coverage of this AS
Its own announcements, validated against the current ROA set
Announced prefixes
2 in total
| Prefix | RPKI | Peers | Sample path | First seen |
|---|---|---|---|---|
| 204.147.0.0/20 v4 | no ROA | 48 | 24482238125979 | 2026-09-18 |
| 2001:4e0:1008::/48 v6 | RPKI valid | 37 | 24482238125979 | 2026-09-18 |