| Upstream: | released (4.3.25, 4.2.8p3-RC1) |
| Ubuntu 14.04 LTS (Trusty Tahr): | released (1:4.2.6.p5+dfsg-3ubuntu2.14.04.5) |
| Ubuntu 16.04 LTS (Xenial Xerus): | released (1:4.2.6.p5+dfsg-3ubuntu8.1) |
| Upstream: | https://github.com/ntp-project/ntp/commit/c3e7afb9cd88784c6b4f81182bd878fc3a2d23a1 |