IPv4 ↕️ | Name ↕️ | Description ↕️ |
|---|---|---|
| 66.159.228.0/24 | Proofpoint, Inc. | |
| 66.159.238.0/23 | Proofpoint, Inc. | |
| 66.159.250.0/23 | Proofpoint, Inc. | |
| 66.159.250.0/24 | Proofpoint, Inc. | |
| 66.159.251.0/24 | Proofpoint, Inc. |
IPv6 ↕️ | Name ↕️ | Description ↕️ |
|---|---|---|
| 2620:0:2900::/48 | Cloudmark, Inc. | |
| 2620:0:2902::/48 | Cloudmark, Inc. | |
| 2620:100:9004::/47 | Proofpoint, Inc. |
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