HomeASN LookupAS104

AS104

🇺🇸

COLORADO-AS - University of Colorado at Boulder8edabd8d50c3a5a30bfa07c4a388fbfe

ARINassigned
Announced Prefixes (BGP)
22total
20 IPv42 IPv6
IPv4 Addresses ⓘ
Allocated (RIR)72,704
Announced (BGP)91,136
IPv6 Addresses ⓘ
Allocated (RIR)7.9×10^28
Announced (BGP)7.9×10^28
Prefix Limit (IPv4)
100
Prefix Limit (IPv6)
10
Country
🇺🇸 US
RIR
ARIN
Status
assigned
Allocated
4/9/1987

Announced Prefixes

(BGP)22
|
Prefix
RPKI
IRR
Last Seen
128.138.0.0/16
No ROA
RADB
5/25/2026
129.19.192.0/18
 Valid
ARINRADB
5/25/2026
146.5.20.0/22
No ROA
RADB
5/25/2026
192.12.238.0/24
No ROA
RADB
5/25/2026
192.12.240.0/24
No ROA
RADB
5/25/2026
192.12.241.0/24
No ROA
RADB
5/25/2026
192.12.242.0/24
No ROA
RADB
5/25/2026
192.12.244.0/24
No ROA
RADB
5/25/2026
192.12.245.0/24
No ROA
RADB
5/25/2026
198.11.16.0/20
No ROA
RADB
5/25/2026
1–10 of 22
1 / 3

Allocated Prefixes

(RIR)15
Prefix
Country
RIR
Status
128.138.0.0/16🇺🇸 USARINallocated
192.12.238.0/24🇺🇸 USARINallocated
192.12.240.0/24🇺🇸 USARINallocated
192.12.241.0/24🇺🇸 USARINallocated
192.12.242.0/24🇺🇸 USARINallocated
192.12.244.0/24🇺🇸 USARINallocated
192.12.245.0/24🇺🇸 USARINallocated
198.11.16.0/20🇺🇸 USARINallocated
198.59.7.0/24🇺🇸 USARINallocated
198.59.51.0/24🇺🇸 USARINallocated
1–10 of 15
1 / 2
ASPA
No ASPA
External Links
ARIN WhoisHurricane Electric BGPRIPEstatPeeringDB
API
Open
GEThttps://api.ipctl.io/v1/asn/104

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

curl -s "https://api.ipctl.io/v1/asn/104" | jq