| 64.184.240.0 | — | — |
| 64.184.240.1 | 64-184-240-1.mammothnetworks.com | — |
| 64.184.240.2 | 64-184-240-2.mammothnetworks.com | — |
| 64.184.240.3 | 64-184-240-3.mammothnetworks.com | — |
| 64.184.240.4 | 64-184-240-4.mammothnetworks.com | — |
| 64.184.240.5 | 64-184-240-5.mammothnetworks.com | — |
| 64.184.240.6 | 64-184-240-6.mammothnetworks.com | — |
| 64.184.240.7 | 64-184-240-7.mammothnetworks.com | — |
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| 64.184.240.19 | 64-184-240-19.mammothnetworks.com | — |
| 64.184.240.20 | zixgateway02.niobrarahospital.org | Yes |
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