123.240.0.0/16

Currently announced by AS131596 TBC, in the routed prefix 123.240.0.0/16.

Current ASN: AS131596; TBC
Routed prefix: 123.240.0.0/16; Most specific route covering this prefix
ASNs over time: 1; 1 announcement record
RIR allocation: APNIC; Taiwan · 123.240.0.0/15

Routing data · Nov 1, 2026, 18:24 UTC

ASN historyEvery routed prefix covering 123.240.0.0/16

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
123.240.0.0/16	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing

More specific routes113 total

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
123.240.0.0/21	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.0.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.4.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.8.0/21	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.8.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.12.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.16.0/21	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.16.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.20.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.22.0/23	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.24.0/21	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.24.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.24.0/23	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.26.0/23	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.28.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.28.0/23	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.32.0/21	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.32.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.34.0/23	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.36.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.36.0/23	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.40.0/21	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.40.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.44.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.48.0/21	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.48.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.52.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.56.0/21	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.56.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.60.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.64.0/21	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.64.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.66.0/23	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.68.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.72.0/21	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.72.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.76.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.80.0/21	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.80.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.84.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.88.0/21	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.88.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.92.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.96.0/21	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.96.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.100.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.104.0/21	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.104.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.104.0/23	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.108.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.112.0/21	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.112.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.114.0/23	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.116.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.116.0/23	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.120.0/21	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.120.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.124.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.128.0/21	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.128.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.132.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.136.0/21	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.136.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.140.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.144.0/21	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.144.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.148.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.152.0/21	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.152.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.152.0/23	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.156.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.160.0/21	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.164.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.166.0/24	AS131596	TBC	Taiwan	2026-11-01 14:24	2026-11-01 18:24	Announcing
123.240.168.0/21	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.168.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.172.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.176.0/21	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.176.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.180.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.184.0/21	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.184.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.188.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.192.0/21	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.192.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.192.0/23	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.196.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.196.0/23	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.200.0/21	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.200.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.204.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.208.0/21	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.208.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.210.0/23	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.212.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.216.0/21	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.216.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.216.0/23	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.220.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.224.0/21	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.224.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.226.0/23	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.228.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.232.0/21	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.232.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.236.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.240.0/21	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.240.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.244.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.244.0/23	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.248.0/21	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.248.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
123.240.252.0/22	AS131596	TBC	Taiwan	Before monitoring	2026-11-01 18:24	Announcing

Change logAll changes

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

Look up another address

RIR allocation record

Registry: APNIC
Allocated block: 123.240.0.0/15
Country: Taiwan
Allocation date: 2007-02-05
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.