Data as of Nov 10, 2026

210.131.0.0/17

No anonymizer space · no proxy exits in 30 days

Fujitsu Limited · space held by Japan Network Information Center

Announcement

this exact prefix

No RPKI

Announced by

AS2510

Type

Residential

88% of it

Announcements

More specific

Announcements inside

Prefix	Origin	Type	Holder
210.131.4.0/24 since Dec 2025	AS55386	Hosting	Japan Network Information Center
210.131.5.0/24 since May 2025	AS55374	Hosting	Japan Network Information Center
210.131.16.0/22 since Dec 2025	AS55386	Hosting	Japan Network Information Center

Composition

The types across the prefix's announced space, by addresses.

Announced space

Address share

Announced space

Types across the prefix

32,768 addresses

Type	Addresses	Share	Ranges
Residential	28,928	88%	6
Mobile	2,304	7.0%	9
Hosting	1,536	4.7%	3

Network & registry

Announcement Routing history RPKI & IRR Whois & abuse

Routing timeline

Who has announced this prefix

Summary

Routing history

Pattern: Stable
First seen: May 2005
Current origin since: May 2005 · 22 yr
Origin networks: 1

IRR

Route objects on the exact prefix

Origin	Registry	Description	Maintainer	Modified
AS2510	NTTCOM	InfoWeb	MAINT-INFOWEB-VERIO	Apr 3, 2002
AS2510	JPIRR	InfoWeb	MAINT-AS2510	Jan 20, 2026

IRR inside

Route objects inside

Prefix	Origin	Registry	Description	Maintainer	Modified
210.131.0.0/24	AS55374	JPIRR	Fujitsu Ltd.	MAINT-AS55374	Apr 2, 2026
210.131.2.0/24	AS55374	JPIRR	Fujitsu Ltd.	MAINT-AS55374	Apr 2, 2026