| Range From | Range To | Organisation |
|---|---|---|
| 99.180.0.0 | 99.180.6.15 |  AT&T Enterprises, LLC |
| 99.180.6.16 | 99.180.6.23 | Private Customer - SBC Internet Services |
| 99.180.6.24 | 99.180.6.31 | Private Customer - SBC Internet Services |
| 99.180.6.32 | 99.180.6.39 | AT&T Enterprises, LLC |
| 99.180.6.40 | 99.180.6.47 | Private Customer - SBC Internet Services |
| 99.180.6.48 | 99.180.6.71 | AT&T Enterprises, LLC |
| 99.180.6.72 | 99.180.6.79 | Private Customer - SBC Internet Services |
| 99.180.6.80 | 99.180.6.87 | Private Customer - SBC Internet Services |
| 99.180.6.88 | 99.180.6.95 | AT&T Enterprises, LLC |
| 99.180.6.96 | 99.180.6.103 | Private Customer - SBC Internet Services |
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