Data as of Nov 13, 2026

133.221.3.0/24

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
Risk
0 / 100 · Low

Announcements

Less specific

Covering announcements

PrefixOriginTypeHolderRPKI
133.221.0.0/16
since Apr 2014
AS2497Internet providerJapan Network Information Center

Network & registry

Routing timeline

Covering aggregate above, the prefix's own history below

Summary

Routing history

Pattern
Stable
First seen
May 2017
Current origin since
May 2017 · 9.5 yr
Origin networks
1