Data as of Nov 7, 2026
81.203.0.0/16
No anonymizer space · no proxy exits in 30 daysInternet Initiative Japan Inc.
Announcement
this exact prefix
RPKI valid
Announced by
Type
Internet provider
Risk
30 / 100 · Medium
Recently moved
Recent change
New origin Sep 2026
from AS6739 Vodafone ONO, S.A., after 12.8 years unannounced
Network & registry
Origin network
AS2497
JP
- Name
- Internet Initiative Japan Inc.
- Type
- Internet provider
- Registered
- Apr 5, 2002
- Domain
- iij.ad.jp
- Website
- www.iij.ad.jp/en/
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced this prefix
Summary
Routing history
- Pattern
- Reactivated
- First seen
- Aug 2010
- Current origin since
- Sep 2026 · 2 mo
- Origin networks
- 2
- Last change of origin
- Sep 2026
Recorded history
History
- Handoffs
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 81.203.0.0/16 | AS2497 | /16 | APNIC | RPKI valid |
Whois
Registration for this announcement
- Range
- 81.
203. 0. 0/ 16 - Netname
- IIJ-CIDR-BLK-JP
- Registrant
- Internet Initiative Japan Inc.
- Registrant country
- JP
- Organization
- Internet Initiative Japan Inc.
- Org country
- JP
- Created
- Not stated by the registry
- Updated
- Dec 23, 2025
- RIR
- APNIC
- Country
- JP
- Delegated
- Nov 12, 2002
- Status
- assigned
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