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Data as of Nov 7, 2026

157.250.74.0/24

No anonymizer space · no proxy exits in 30 days

ARTERIA Networks Corporation · space held by WorkUP Inc.

Announcement

157.250.72.0/21

No RPKI

Announced by

Type

Business

Risk

0 / 100 · Low

Registrations in this block

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

Range	Addresses	Netname	Holder	Type	Created	Abuse contact
157.250.64.0/18	16,384	WORKUP-JP	WorkUP Inc. (ORG-GNCL1-AP) · JP	ALLOCATED PORTABLE	—	abuse@grnt.ne.jp
└ 157.250.72.0/21	2,048	GRNT-JP	WorkUP Inc. (ORG-GNCL1-AP) · JP	ALLOCATED PORTABLE	—	abuse@grnt.ne.jp
└ 157.250.74.0/24	256	GREENNET	Green Net Co., Ltd.	ALLOCATED NON-PORTABLE	—	abuse@grnt.ne.jp

Network & registry

Announcement Routing history RPKI & IRR Whois & abuse

Announced by

Covering announcement 157.250.72.0/21

Prefix: 157.250.72.0/21
Announced by: AS2519 ARTERIA Networks Corporation
Type: Business
Proxy exits: 1
RPKI: No RPKI
Netname: GRNT-JP
Registrant: WorkUP Inc.
RIR: APNIC

Registry

Holder

Organization: WorkUP Inc.
Handle: ORG-GNCL1-AP
Range: 157.250.64.0/18
Registration type: ALLOCATED PORTABLE

Origin network

AS2519

JP

Name: ARTERIA Networks Corporation
Type: Internet provider
Registered: Apr 5, 2002
Domain: arteria-net.com
Website: www.arteria-net.com/en/
Industry: Internet Service Provider (ISP)
Spamhaus ASN-DROP: not listed