143.73.21.0/24
Origin history for this exact network block.
| From | Until | Origin ASN | Name at start |
|---|---|---|---|
| 2026-11-06 | 2026-11-07 | AS1540 | Headquarters, USAISC |
| 2026-11-03 | 2026-11-04 | AS1540 | Headquarters, USAISC |
| 2026-10-31 | 2026-11-01 | AS1540 | Headquarters, USAISC |
| 2026-10-21 | 2026-10-23 | AS1540 | Headquarters, USAISC |
| 2026-09-30 | 2026-10-01 | AS367 | United States Department of Defense (DoD) |
| 2026-09-23 | 2026-09-24 | AS367 | United States Department of Defense (DoD) |
| 2026-09-11 | 2026-09-12 | AS367 | United States Department of Defense (DoD) |
| 2026-09-03 | 2026-09-04 | AS367 | United States Department of Defense (DoD) |
| 2026-08-26 | 2026-08-27 | AS367 | United States Department of Defense (DoD) |
| 2026-08-11 | 2026-08-15 | AS367 | United States Department of Defense (DoD) |
| 2026-08-07 | 2026-08-08 | AS367 | United States Department of Defense (DoD) |
| 2026-07-28 | 2026-08-01 | AS367 | United States Department of Defense (DoD) |
| 2026-07-25 | 2026-07-26 | AS367 | United States Department of Defense (DoD) |