AS2501
The University of Tokyo — u-tokyo.ac.jp
Summary
| Country |
 Japan
|
| Organization | The University of Tokyo |
| Domain | u-tokyo.ac.jp |
| Number of IPv4 | 200,704 |
| Number of IPv6 | 7.9229× 1028 |
| AS Type | Education |
| Registry | JPNIC |
| Allocated | January 01, 1970 (about 56 years ago) |
| Updated | March 19, 2014 (about 11 years ago) |
IP Ranges
AS2501 announces 4 IPv4 ranges and 2 IPv6 ranges.
That's a total of 200,704 IPv4 addresses and 7.9229× 1028 IPv6 addresses.
| Prefix | Organization | Size | Registry | Status |
|---|---|---|---|---|
| 130.69.0.0/16 |
University of Tokyo
|
65,536 | APNIC | ALLOCATED PORTABLE |
| 133.11.0.0/16 |
Japan Network Information Center
|
65,536 | APNIC | ALLOCATED PORTABLE |
| 157.82.0.0/16 |
University of Tokyo
|
65,536 | APNIC | ALLOCATED PORTABLE |
| 192.51.208.0/20 |
University of Tokyo
|
4,096 | JPNIC |
| Prefix | Organization | Size | Registry | Status |
|---|---|---|---|---|
| 2404:d540::/32 |
The University of Tokyo
|
7.9228× 1028 | JPNIC | |
| 2404:d540:1::/48 |
THE UNIVERSITY OF TOKYO
|
1.2089× 1024 | JPNIC |
Peers
AS2501 does not have any direct peering agreements. Instead, its global connectivity is achieved through transit providers. While this setup ensures comprehensive reach, future peering could reduce latency and optimize route efficiency.
Upstreams
AS2501 connects to the global Internet via at least 2 upstream providers. In this setup, AS2501 acts as a customer, subscribing to these transit services to obtain full BGP routing information and ensure reliable, redundant access to external networks.
Downstreams
AS2501 currently has no downstream networks, meaning it does not serve as a transit provider to customer networks.