HomeASN LookupAS2501

AS2501

UTnet - The University of Tokyo

Announced Prefixes (BGP)
7total
5 IPv42 IPv6
IPv4 Addresses ⓘ
Allocated (RIR)135,168
Announced (BGP)202,752
IPv6 Addresses ⓘ
Allocated (RIR)7.9×10^28
Announced (BGP)7.9×10^28
Prefix Limit (IPv4)
200
Prefix Limit (IPv6)
10
Allocated
—

Announced Prefixes

(BGP)7
|
Prefix
RPKI
IRR
Last Seen
130.69.0.0/16
No ROA
RADB
5/25/2026
133.11.0.0/16
No ROA
RADB
5/25/2026
157.82.0.0/16
No ROA
RADB
5/25/2026
157.82.112.0/21
No ROA—5/25/2026
192.51.208.0/20
No ROA
RADB
5/25/2026
2404:d540::/32
No ROA
RADB
5/25/2026
2404:d540:1::/48
No ROA
RADB
5/25/2026

Allocated Prefixes

(RIR)4
Prefix
Country
RIR
Status
130.69.0.0/16🇯🇵 JPAPNICallocated
157.82.0.0/16🇯🇵 JPAPNICallocated
192.51.208.0/20🇯🇵 JPAPNICallocated
2404:d540::/32🇯🇵 JPAPNICallocated
ASPA
No ASPA
External Links
Hurricane Electric BGPRIPEstatPeeringDB
API
Open
GEThttps://api.ipctl.io/v1/asn/2501

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

curl -s "https://api.ipctl.io/v1/asn/2501" | jq