Data as of Nov 15, 2026

133.221.0.0/16

No anonymizer space · no proxy exits in 30 days

Internet Initiative Japan Inc. · space held by Japan Network Information Center

Announcement
this exact prefix
No RPKI
Announced by
Type
Internet provider

Announcements

More specific

Announcements inside

PrefixOriginTypeHolderRPKI
133.221.3.0/24
since May 2017
AS2497Internet providerJapan Network Information Center

Network & registry

Routing timeline

Who has announced this prefix

Summary

Routing history

Pattern
Stable
First seen
May 2005
Current origin since
Apr 2014 · 13 yr
Origin networks
2
Last change of origin
Apr 2014
Recorded history

History

Handoffs
1