143.194.104.0/21
Currently announced by AS1540 Headquarters, USAISC, in the routed prefix 143.194.104.0/21.
- Current ASN
- AS1540
- Headquarters, USAISC
- Routed prefix
- 143.194.104.0/21
- Most specific route covering this prefix
- ASNs over time
- 2
- 2 announcement records
- RIR allocation
- ARIN
- United States · 143.194.0.0/16
Routing data · Nov 8, 2026, 10:26 UTC
ASN historyEvery routed prefix covering 143.194.104.0/21
| Prefix | ASN | Name | Registered country | First seen (UTC) | Last seen (UTC) | Status |
|---|---|---|---|---|---|---|
| 143.194.104.0/21 | AS1540 | Headquarters, USAISC |  United States | 2026-11-04 02:23 | 2026-11-08 10:26 | Announcing |
| 143.194.104.0/21 | AS367 | United States Department of Defense (DoD) | United States | Before monitoring | 2026-11-04 00:23 | Stopped |
More specific routes2 total
| Prefix | ASN | Name | Registered country | First seen (UTC) | Last seen (UTC) | Status |
|---|---|---|---|---|---|---|
| 143.194.108.0/23 | AS1540 | Headquarters, USAISC | United States | 2026-11-04 02:23 | 2026-11-08 10:26 | Announcing |
| 143.194.108.0/23 | AS367 | United States Department of Defense (DoD) | United States | Before monitoring | 2026-11-04 00:23 | Stopped |
Change logAll changes
| Detected (UTC) | Prefix | Change | ASN | Name | Previous ASN | Country |
|---|---|---|---|---|---|---|
| 2026-11-04 02:23 | 143.194.104.0/21 | Origin change | AS1540 | Headquarters, USAISC | AS367 | United States |