133.162.0.0/16

Currently announced by AS2510 Fujitsu Limited, in the routed prefix 133.162.0.0/16.

Current ASN: AS2510; Fujitsu Limited
Routed prefix: 133.162.0.0/16; Most specific route covering this prefix
ASNs over time: 1; 1 announcement record
RIR allocation: APNIC; Japan · 133.0.0.0/8

Routing data · Oct 23, 2026, 20:21 UTC

ASN historyEvery routed prefix covering 133.162.0.0/16

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
133.162.0.0/16	AS2510	Fujitsu Limited	Japan	Before monitoring	2026-10-23 20:21	Announcing

More specific routes36 total

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
133.162.64.0/21	AS55374	FUJITSU LIMITED	Japan	Before monitoring	2026-10-23 20:21	Announcing
133.162.72.0/21	AS55374	FUJITSU LIMITED	Japan	Before monitoring	2026-10-23 20:21	Announcing
133.162.80.0/21	AS55386	FUJITSU LIMITED	Japan	Before monitoring	2026-10-23 20:21	Announcing
133.162.96.0/21	AS55374	FUJITSU LIMITED	Japan	Before monitoring	2026-10-23 20:21	Announcing
133.162.105.0/24	AS55374	FUJITSU LIMITED	Japan	Before monitoring	2026-10-23 20:21	Announcing
133.162.106.0/23	AS55374	FUJITSU LIMITED	Japan	Before monitoring	2026-10-23 20:21	Announcing
133.162.108.0/22	AS55374	FUJITSU LIMITED	Japan	Before monitoring	2026-10-23 20:21	Announcing
133.162.114.0/24	AS55374	FUJITSU LIMITED	Japan	Before monitoring	2026-10-23 20:21	Announcing
133.162.115.0/24	AS55374	FUJITSU LIMITED	Japan	Before monitoring	2026-10-23 20:21	Announcing
133.162.116.0/24	AS55374	FUJITSU LIMITED	Japan	Before monitoring	2026-10-23 20:21	Announcing
133.162.117.0/24	AS55374	FUJITSU LIMITED	Japan	Before monitoring	2026-10-23 20:21	Announcing
133.162.118.0/24	AS55374	FUJITSU LIMITED	Japan	Before monitoring	2026-10-23 20:21	Announcing
133.162.119.0/24	AS55374	FUJITSU LIMITED	Japan	Before monitoring	2026-10-23 20:21	Announcing
133.162.120.0/23	AS55386	FUJITSU LIMITED	Japan	Before monitoring	2026-10-23 20:21	Announcing
133.162.124.0/24	AS55374	FUJITSU LIMITED	Japan	Before monitoring	2026-10-23 20:21	Announcing
133.162.125.0/24	AS55374	FUJITSU LIMITED	Japan	Before monitoring	2026-10-23 20:21	Announcing
133.162.126.0/24	AS55374	FUJITSU LIMITED	Japan	Before monitoring	2026-10-23 20:21	Announcing
133.162.129.0/24	AS55374	FUJITSU LIMITED	Japan	Before monitoring	2026-10-23 20:21	Announcing
133.162.140.0/23	AS55374	FUJITSU LIMITED	Japan	Before monitoring	2026-10-23 20:21	Announcing
133.162.142.0/23	AS55374	FUJITSU LIMITED	Japan	Before monitoring	2026-10-23 20:21	Announcing
133.162.144.0/21	AS55386	FUJITSU LIMITED	Japan	Before monitoring	2026-10-23 20:21	Announcing
133.162.152.0/21	AS55386	FUJITSU LIMITED	Japan	Before monitoring	2026-10-23 20:21	Announcing
133.162.160.0/21	AS55374	FUJITSU LIMITED	Japan	Before monitoring	2026-10-23 20:21	Announcing
133.162.168.0/21	AS55386	FUJITSU LIMITED	Japan	Before monitoring	2026-10-23 20:21	Announcing
133.162.176.0/23	AS55374	FUJITSU LIMITED	Japan	Before monitoring	2026-10-23 20:21	Announcing
133.162.185.0/24	AS55374	FUJITSU LIMITED	Japan	Before monitoring	2026-10-23 20:21	Announcing
133.162.188.0/24	AS55386	FUJITSU LIMITED	Japan	Before monitoring	2026-10-23 20:21	Announcing
133.162.192.0/21	AS55374	FUJITSU LIMITED	Japan	Before monitoring	2026-10-23 20:21	Announcing
133.162.200.0/21	AS55374	FUJITSU LIMITED	Japan	Before monitoring	2026-10-23 20:21	Announcing
133.162.208.0/21	AS55374	FUJITSU LIMITED	Japan	Before monitoring	2026-10-23 20:21	Announcing
133.162.216.0/21	AS55374	FUJITSU LIMITED	Japan	Before monitoring	2026-10-23 20:21	Announcing
133.162.224.0/22	AS55374	FUJITSU LIMITED	Japan	Before monitoring	2026-10-23 20:21	Announcing
133.162.236.0/24	AS55374	FUJITSU LIMITED	Japan	Before monitoring	2026-10-23 20:21	Announcing
133.162.130.0/23	AS55374	FUJITSU LIMITED	Japan	Before monitoring	2026-10-22 08:21	Stopped
133.162.132.0/23	AS55374	FUJITSU LIMITED	Japan	Before monitoring	2026-10-22 12:20	Stopped
133.162.134.0/24	AS55374	FUJITSU LIMITED	Japan	Before monitoring	2026-10-22 08:21	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: APNIC
Allocated block: 133.0.0.0/8
Country: Japan
Allocation date: 1997-03-01
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.