HomeASN LookupAS59

AS59

🇺🇸

WISC-MADISON-AS - University of Wisconsin Madisonb80d0f10fd655e6666239b1bee86e727

ARINassigned
Announced Prefixes (BGP)
19total
18 IPv41 IPv6
IPv4 Addresses ⓘ
Allocated (RIR)329,984
Announced (BGP)332,288
IPv6 Addresses ⓘ
Allocated (RIR)7.9×10^28
Announced (BGP)7.9×10^28
Prefix Limit (IPv4)
500
Prefix Limit (IPv6)
5
Country
🇺🇸 US
RIR
ARIN
Status
assigned
Allocated
1/21/1986

Announced Prefixes

(BGP)19
|
Prefix
RPKI
IRR
Last Seen
72.33.0.0/16
 Valid
ARIN
5/18/2026
128.104.0.0/16
 Valid
ARIN
5/18/2026
128.104.227.0/24
 Valid—5/18/2026
128.105.0.0/16
 Valid
ARIN
5/18/2026
128.105.68.0/23
 Valid—5/18/2026
144.92.0.0/16
 Valid
ARIN
5/18/2026
144.92.180.0/23
 Valid—5/18/2026
146.151.0.0/16
 Valid
ARIN
5/18/2026
192.12.220.0/24
 Valid
ARIN
5/18/2026
192.12.223.0/24
 Valid
ARIN
5/18/2026
1–10 of 19
1 / 2

Allocated Prefixes

(RIR)15
Prefix
Country
RIR
Status
72.33.0.0/16🇺🇸 USARINallocated
128.104.0.0/16🇺🇸 USARINallocated
128.105.0.0/16🇺🇸 USARINallocated
144.92.0.0/16🇺🇸 USARINallocated
146.151.0.0/16🇺🇸 USARINallocated
192.12.220.0/24🇺🇸 USARINallocated
192.12.223.0/24🇺🇸 USARINallocated
192.12.224.0/24🇺🇸 USARINallocated
192.86.79.0/24🇺🇸 USARINallocated
198.51.246.0/24🇺🇸 USARINallocated
1–10 of 15
1 / 2
ASPA
No ASPA
External Links
ARIN WhoisHurricane Electric BGPRIPEstatPeeringDB
API
Open
GEThttps://api.ipctl.io/v1/asn/59

Returns ASN details, announced prefixes, and BGP routing data.

curl -s "https://api.ipctl.io/v1/asn/59" | jq