AS19957 AT&T Corp.
General Info - AS19957
268,288
9,223,372,036,854,775,808
IP Address Ranges
| Netblock | Number of IPs | |
|---|---|---|
| 12.204.201.0/24 | 256 | |
| 12.204.206.0/24 | 256 | |
| 12.204.208.0/23 | 512 | |
| 12.204.216.0/21 | 2,048 | |
| 64.79.182.0/23 | 512 | |
| 66.4.0.0/16 | 65,536 | |
| 70.150.21.0/24 | 256 | |
| 70.150.247.0/24 | 256 | |
| 72.158.184.0/24 | 256 | |
| 72.159.76.0/24 | 256 | |
| 170.141.56.0/23 | 512 | |
| 170.141.60.0/23 | 512 | |
| 198.146.0.0/16 | 65,536 | |
| 206.23.0.0/16 | 65,536 | |
| 208.63.128.0/23 | 512 | |
| 208.182.0.0/16 | 65,536 |
| Netblock | Number of IPs | |
|---|---|---|
| 2604:f980:2100::/44 | 19,342,813,113,834,066,795,298,816 | |
| 2604:f980:2500::/44 | 19,342,813,113,834,066,795,298,816 | |
| 2604:f980:2600::/40 | 309,485,009,821,345,068,724,781,056 | |
| 2604:f980:2d00::/40 | 309,485,009,821,345,068,724,781,056 | |
| 2604:f980:3000::/36 | 4,951,760,157,141,521,099,596,496,896 | |
| 2604:f980:4240::/44 | 19,342,813,113,834,066,795,298,816 | |
| 2604:f980:4300::/44 | 19,342,813,113,834,066,795,298,816 | |
| 2604:f980:4360::/44 | 19,342,813,113,834,066,795,298,816 | |
| 2604:f980:4380::/43 | 38,685,626,227,668,133,590,597,632 | |
| 2604:f980:4480::/44 | 19,342,813,113,834,066,795,298,816 | |
| 2604:f980:4500::/44 | 19,342,813,113,834,066,795,298,816 | |
| 2604:f980:5100::/40 | 309,485,009,821,345,068,724,781,056 |
Upstreams
Downstreams
There are no downstreams for this ASN.
What is an Autonomous System (AS)?
An Autonomous System (AS) is a collection of connected networks that operate under a common administrative domain and share routing policies. Each AS is identified by a unique Autonomous System Number (ASN), which is used to exchange routing information with other ASs. AS can control how traffic flows through networks and then filter out unwanted traffic.
