AS3128 BRUWS-AS3128 - University of Wisconsin System
🇺🇸ARINassigned
Announced Prefixes (BGP)
13total
12 IPv41 IPv6
IPv4 Addresses
Allocated (RIR)590,080
Announced (BGP)656,640
IPv6 Addresses
Allocated (RIR)1.2×10³⁰
Announced (BGP)1.2×10³⁰
Announced Prefixes
(BGP)13|
Prefix | RPKI | IRR | Last Seen |
|---|---|---|---|
| Valid | ARIN | 2026-10-10 | |
| Valid | ARIN | 2026-10-10 | |
| Valid | ARIN | 2026-10-10 | |
| Valid | ARINOther IRR | 2026-10-10 | |
| Valid | - | 2026-10-10 | |
| Valid | ARINOther IRR | 2026-10-10 | |
| Valid | ARIN | 2026-10-10 | |
| Valid | ARIN | 2026-10-10 | |
| Valid | ARIN | 2026-10-10 | |
| Valid | ARIN | 2026-10-10 |
1-10 of 13
1 / 2
Allocated Prefixes
(RIR)11Prefix | Country | RIR | Status |
|---|---|---|---|
| 131.210.0.0/16 | 🇺🇸 US | ARIN | allocated |
| 137.81.0.0/16 | 🇺🇸 US | ARIN | allocated |
| 137.104.0.0/16 | 🇺🇸 US | ARIN | allocated |
| 138.49.0.0/16 | 🇺🇸 US | ARIN | allocated |
| 139.225.0.0/16 | 🇺🇸 US | ARIN | allocated |
| 141.233.0.0/16 | 🇺🇸 US | ARIN | allocated |
| 143.200.0.0/16 | 🇺🇸 US | ARIN | allocated |
| 143.235.0.0/16 | 🇺🇸 US | ARIN | allocated |
| 143.236.0.0/16 | 🇺🇸 US | ARIN | allocated |
| 192.35.81.0/24 | 🇺🇸 US | ARIN | allocated |
1-10 of 11
1 / 2
All 13 announced prefixes of AS3128 →
BGP Neighbours
(seen in AS paths)Upstreams (2)
Networks AS3128 hands its own prefixes to: transit providers, or peers at an exchange.
ASPA
No ASPA
External Links
Learn more
- What is an ASN?Autonomous systems, ASN ranges and how they are assigned
- RPKI and route origin validationWhat the RPKI badges on the prefix list mean
- ASPA explainedWhy AS3128 should publish an ASPA object
- IPv4 transfers in the ARIN regionMonthly volume and the latest registry transfers
- ASN data in AI agents and SIEMMCP server and API integrations
API
Open https://api.ipctl.io/v1/asn/3128Returns ASN details, announced prefixes, and BGP routing data.
curl -s "https://api.ipctl.io/v1/asn/3128" | jq