AS37917
University of Tsukuba — tsukuba.ac.jp
Summary
| Country |
 Japan
|
| Organization | University of Tsukuba |
| Domain | tsukuba.ac.jp |
| Number of IPv4 | 132,096 |
| Number of IPv6 | 0 |
| AS Type | Education |
| Registry | JPNIC |
| Allocated | January 01, 1970 (about 56 years ago) |
| Updated | June 11, 2007 (about 18 years ago) |
IP Ranges
AS37917 announces 3 IPv4 ranges and 0 IPv6 range.
That's a total of 132,096 IPv4 address and 0 IPv6 address.
| Prefix | Organization | Size | Registry | Status |
|---|---|---|---|---|
| 130.158.0.0/16 |
University of Tsukuba
|
65,536 | APNIC | ALLOCATED PORTABLE |
| 133.51.0.0/16 |
Japan Network Information Center
|
65,536 | APNIC | ALLOCATED PORTABLE |
| 163.220.252.0/22 |
University of Tsukuba
|
1,024 | JPNIC |
Peers
AS37917 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
AS37917 connects to the global Internet via at least 2 upstream providers. In this setup, AS37917 acts as a customer, subscribing to these transit services to obtain full BGP routing information and ensure reliable, redundant access to external networks.
Downstreams
AS37917 currently has no downstream networks, meaning it does not serve as a transit provider to customer networks.