158.20.128.0/17

Currently announced by AS1540 Headquarters, USAISC, in the routed prefix 158.20.128.0/17.

Current ASN
AS1540
Headquarters, USAISC
Routed prefix
158.20.128.0/17
Most specific route covering this prefix
ASNs over time
2
2 announcement records
RIR allocation
ARIN
United States · 158.20.0.0/16

Routing data · Nov 8, 2026, 10:26 UTC

ASN historyEvery routed prefix covering 158.20.128.0/17

PrefixASNNameRegistered countryFirst seen (UTC)Last seen (UTC)Status
158.20.128.0/17AS1540Headquarters, USAISCUnited States2026-11-04 02:232026-11-08 10:26Announcing
158.20.128.0/17AS367United States Department of Defense (DoD)United StatesBefore monitoring2026-11-04 00:23Stopped

More specific routes18 total

PrefixASNNameRegistered countryFirst seen (UTC)Last seen (UTC)Status
158.20.144.0/22AS367United States Department of Defense (DoD)United States2026-11-04 02:232026-11-08 10:26Announcing
158.20.200.0/24AS367United States Department of Defense (DoD)United States2026-11-04 02:232026-11-08 10:26Announcing
158.20.201.0/24AS367United States Department of Defense (DoD)United States2026-11-04 02:232026-11-08 10:26Announcing
158.20.202.0/23AS367United States Department of Defense (DoD)United States2026-11-04 02:232026-11-08 10:26Announcing
158.20.208.0/23AS367United States Department of Defense (DoD)United States2026-11-04 02:232026-11-08 10:26Announcing
158.20.214.0/24AS367United States Department of Defense (DoD)United States2026-11-04 02:232026-11-08 10:26Announcing
158.20.241.0/24AS367United States Department of Defense (DoD)United States2026-11-04 02:232026-11-08 10:26Announcing
158.20.252.0/24AS1540Headquarters, USAISCUnited StatesBefore monitoring2026-11-08 10:26Announcing
158.20.128.0/22AS1540Headquarters, USAISCUnited States2026-11-04 02:232026-11-04 08:21Stopped
158.20.132.0/22AS1540Headquarters, USAISCUnited States2026-11-04 02:232026-11-04 08:21Stopped
158.20.136.0/22AS1540Headquarters, USAISCUnited States2026-11-04 02:232026-11-04 04:22Stopped
158.20.140.0/22AS1540Headquarters, USAISCUnited States2026-11-04 02:232026-11-04 08:21Stopped
158.20.184.0/21AS1540Headquarters, USAISCUnited States2026-11-04 02:232026-11-04 08:21Stopped
158.20.204.0/23AS1540Headquarters, USAISCUnited States2026-11-04 02:232026-11-04 08:21Stopped
158.20.206.0/23AS1540Headquarters, USAISCUnited States2026-11-04 02:232026-11-04 08:21Stopped
158.20.210.0/23AS1540Headquarters, USAISCUnited States2026-11-04 02:232026-11-04 04:22Stopped
158.20.216.0/22AS1540Headquarters, USAISCUnited States2026-11-04 02:232026-11-04 08:21Stopped
158.20.224.0/21AS1540Headquarters, USAISCUnited States2026-11-04 02:232026-11-04 08:21Stopped

Change logAll changes

Detected (UTC)PrefixChangeASNNamePrevious ASNCountry
2026-11-04 02:23158.20.128.0/17Origin changeAS1540Headquarters, USAISCAS367United States