158.120.128.0/18

Currently announced by AS15171 TOMBIGBEE-FIBER, in the routed prefix 158.120.128.0/18.

Current ASN: AS15171; TOMBIGBEE-FIBER
Routed prefix: 158.120.128.0/18; Most specific route covering this prefix
ASNs over time: 1; 1 announcement record
RIR allocation: ARIN; United States · 158.120.128.0/18

Routing data · Nov 8, 2026, 10:26 UTC

ASN historyEvery routed prefix covering 158.120.128.0/18

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
158.120.128.0/18	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing

More specific routes36 total

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
158.120.128.0/24	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing
158.120.129.0/24	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing
158.120.130.0/23	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing
158.120.132.0/23	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing
158.120.134.0/23	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing
158.120.136.0/24	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing
158.120.137.0/24	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing
158.120.138.0/24	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing
158.120.139.0/24	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing
158.120.140.0/24	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing
158.120.143.0/24	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing
158.120.144.0/24	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing
158.120.146.0/24	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing
158.120.148.0/23	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing
158.120.150.0/24	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing
158.120.154.0/23	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing
158.120.156.0/23	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing
158.120.159.0/24	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing
158.120.161.0/24	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing
158.120.162.0/24	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing
158.120.163.0/24	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing
158.120.164.0/24	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing
158.120.166.0/24	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing
158.120.168.0/23	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing
158.120.170.0/24	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing
158.120.171.0/24	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing
158.120.173.0/24	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing
158.120.175.0/24	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing
158.120.177.0/24	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing
158.120.179.0/24	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing
158.120.181.0/24	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing
158.120.184.0/24	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing
158.120.185.0/24	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing
158.120.189.0/24	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing
158.120.190.0/24	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-08 10:26	Announcing
158.120.160.0/24	AS15171	TOMBIGBEE-FIBER	United States	Before monitoring	2026-11-03 00:25	Stopped

Change logAll changes

The routes covering this address have had no origin changes since ASNBase started monitoring.

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RIR allocation record

Registry: ARIN
Allocated block: 158.120.128.0/18
Country: United States
Allocation date: 2021-05-07
Status: allocated

From the RIRs’ delegated statistics files. Shows where the addresses are registered, not where they are used.

How monitoring works

Every 2 hours ASNBase takes the bgp.tools global routing table (prefix → origin ASN) and compares it with the previous one. The detected time is the time of that comparison; the actual change can be up to about 2 hours earlier.
Only routes seen by more than 100 bgp.tools peers are listed as changes; routes with less visibility are only kept in the history.
A new announcement counts only if it is still in the next routing table, and a withdrawal only if the prefix is missing from two tables in a row, so short flaps are ignored.
ASNBase has been monitoring since 2026-10-19. “Before monitoring” under “First seen” means the route was already announced when monitoring started; the earlier date is unknown.
Prefixes first seen during the first day of monitoring do not count as new announcements: most of them were simply missing from the table at the moment monitoring started.
Countries and regions follow the ASN’s registration, not the actual location of the IP addresses.