| Range From | Range To | Organisation |
|---|---|---|
| 99.0.0.0 | 99.0.43.255 |  AT&T Enterprises, LLC |
| 99.0.44.0 | 99.0.44.7 | Private Customer - SBC Internet Services |
| 99.0.44.8 | 99.0.44.23 | AT&T Enterprises, LLC |
| 99.0.44.24 | 99.0.44.31 | Private Customer - SBC Internet Services |
| 99.0.44.32 | 99.0.44.39 | AT&T Enterprises, LLC |
| 99.0.44.40 | 99.0.44.47 | Private Customer - SBC Internet Services |
| 99.0.44.48 | 99.0.44.55 | Private Customer - SBC Internet Services |
| 99.0.44.56 | 99.0.44.63 | AT&T Enterprises, LLC |
| 99.0.44.64 | 99.0.44.71 | Private Customer - SBC Internet Services |
| 99.0.44.72 | 99.0.44.79 | Private Customer - SBC Internet Services |
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