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Data as of Nov 4, 2026

203.183.56.0/21

No anonymizer space · no proxy exits in 30 days

IDC Frontier Inc. · space held by Japan Network Information Center

Announcement
203.183.0.0/17
RPKI valid
Announced by
AS4694
Type
Hosting
Risk
50 / 100 · Medium

Announcements

Less specific

Covering announcements

PrefixOriginTypeProxy exitsHolderRPKI
203.183.0.0/16
since Oct 2005
AS4694Hosting2Japan Network Information Center

Registrations in this block

The registry's network records over this block, widest first, each under its parent.

RangeAddressesNetnameHolderTypeCreatedAbuse contact
203.178.0.0 - 203.183.255.255393,216JPNIC-NET-JPJapan Network Information CenterALLOCATED PORTABLE——

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
Announced by

Covering announcement 203.183.0.0/17

Prefix
203.183.0.0/17
Announced by
AS4694 IDC Frontier Inc.
Type
Hosting
Proxy exits
2
RPKI
RPKI valid
Netname
IDCFNet-CIDR-BLK-JP
Registrant
IDC Frontier Inc.
RIR
APNIC
IPv4 market

Holder

Holder in the market →
Organization
Japan Network Information Center
Range
203.178.0.0 - 203.183.255.255
Registration type
ALLOCATED PORTABLE
Origin network

AS4694

JP
Name
IDC Frontier Inc.
Type
Hosting
Registered
Aug 30, 1995
Domain
idcf.jp
Website
www.idcf.jp/english/
Spamhaus ASN-DROP
not listed