Route changes on 2026-10-31

Changes found when comparing the global BGP routing table on 2026-10-31 (UTC): IP prefixes that moved to another ASN, were announced for the first time, gained an extra origin, or were withdrawn from the table.

Origin change: 21; That day · filtered
New announcement: 168; That day · filtered
Origin added: 24; That day · filtered
Withdrawal: 2,109; That day · filtered

Routing data · Nov 1, 2026, 18:24 UTC

Origin changeClear filters

CountryIP versionASN

Detected (UTC)	Prefix	Change	ASN	Name	Previous ASN	Country
22:25	62.144.58.0/24	Origin change	AS149513	Vertex	AS401362	United States
22:25	205.71.112.0/20	Origin change	AS5839	United States Department of Defense (DoD)	AS5371	United States
18:24	2a13:c8c4:fc07::/48	Origin change	AS40419	Austin Hadley, Sole Proprietorship	AS218995	United States
18:24	199.169.193.0/24	Origin change	AS13506	United States Department of the Treasury	AS22906	United States
18:24	199.169.192.0/24	Origin change	AS13506	United States Department of the Treasury	AS22906	United States
18:24	108.186.50.0/24	Origin change	AS397423	Tier.Net Technologies LLC	AS16509	United States
14:22	143.70.48.0/24	Origin changeNo longer announced	AS1501	Headquarters, USAISC	AS367	United States
10:23	45.91.81.0/24	Origin change	AS1054	ZONT-LLC	AS8796	United States
10:23	162.4.53.0/24	Origin change	AS174	Cogent Communications, Inc.	AS152324	United States
06:18	45.140.88.0/24	Origin change	AS1054	ZONT-LLC	AS8796	United States
06:18	204.13.189.0/24	Origin change	AS4996	Citigroup Inc.	AS35967	United States
06:18	204.13.184.0/24	Origin change	AS4996	Citigroup Inc.	AS35967	United States
06:18	177.202.112.0/24	Origin change	AS40676	Psychz Networks	AS401152	United States
06:18	15.24.78.0/24	Origin change	AS2154	HP Inc.	AS21302	United States
06:18	144.225.65.0/24	Origin change	AS40676	Psychz Networks	AS401152	United States
02:18	2a0a:8c46::/32	Origin change	AS15626	ITL Company AS15626	AS219303	United States
02:18	2001:67c:2f6c::/48	Origin change	AS15626	ITL Company AS15626	AS219303	United States
02:18	195.28.182.0/23	Origin change	AS15626	ITL Company AS15626	AS219303	United States
02:18	188.220.85.0/24	Origin change	AS3257	GTT Communications (AS3257)	AS219447	United States
02:18	185.253.0.0/24	Origin change	AS15626	ITL Company AS15626	AS219303	United States
02:18	171.33.241.0/24	Origin change	AS15626	ITL Company AS15626	AS219303	United States

By day

Origin change
New announcement
Origin added

Prefixes with a new ASN on each of the last 7 days, excluding withdrawals. Select a date to see all of that day’s changes. Another 433 changes are waiting for confirmation at the next comparison.

IP address ASN history

Enter an IP address or prefix to see which ASNs have announced the routes covering it.

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.