| Prefix | Company | Number of IPs |
|---|---|---|
| 130.69.0.0/16 | University of Tokyo | 65,536 |
| 133.11.0.0/16 | University of Tokyo | 65,536 |
| 157.82.0.0/16 | University of Tokyo | 65,536 |
| 192.51.208.0/20 | University of Tokyo | 4,096 |
| 2404:d540::/32 | The University of Tokyo | 7.92 × 1028 |
| 2404:d540:1::/48 | THE UNIVERSITY OF TOKYO | 1.21 × 1024 |
IP ranges are the different blocks of IP addresses advertised by an Autonomous System (AS). These ranges can be used by the same organization operating the AS, or by different organizations.
AS2501 has no peers recorded.
Peering is a direct, often free, traffic exchange between Autonomous Systems (ASNs). They share routes only to their own networks and customers, making connections faster and cheaper for that specific traffic, without providing full internet access to each other.
AS2501 has no downstreams recorded.
A downstream is a customer Autonomous System that pays another AS (its provider) for internet access. The provider AS carries the downstream's traffic and makes its network reachable.
Discover your public IP address and detailed information about your connection.
Convert CIDR notation to IP address ranges and vice versa. Useful for network configuration and security.
Perform a reverse DNS (rDNS) lookup to get the hostname for an IP address.
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