Data as of Nov 15, 2026

203.151.0.0/20

No anonymizer space · no proxy exits in 30 days

Internet Thailand Company Limited · space held by Internet Thailand Company Ltd.

Announcement

this exact prefix

RPKI valid

Announced by

AS4618

Type

Hosting

94% of it

Announcements

Less specific

Covering announcements

Prefix	Origin	Type	Proxy exits	Holder	RPKI
203.151.0.0/19 since May 2005	AS4618	Hosting		Internet Thailand Company Ltd.
203.151.0.0/16 since May 2005	AS4618	Hosting	6 1 always on	Internet Thailand Company Ltd.

More specific

Announcements inside

Prefix	Origin	Type	Holder
203.151.0.0/24 since Mar 2025	AS4618	Hosting	Internet Thailand Company Ltd.
203.151.1.0/24 since Jun 2014	AS133529	Business	Internet Thailand Company Ltd.
203.151.3.0/24 since Mar 2025	AS4618	Hosting	Internet Thailand Company Ltd.
203.151.6.0/24 since Sep 2026	AS4618	Hosting	Internet Thailand Company Ltd.
203.151.10.0/24 since Sep 2024	AS4618	Hosting	Internet Thailand Company Ltd.
203.151.11.0/24 since Sep 2024	AS4618	Hosting	Internet Thailand Company Ltd.

Registrations in this block

The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.

Range	Addresses	Netname	Holder	Type	Created	Abuse contact
203.151.0.0/16	65,536	INET-TH	Internet Thailand Company Ltd. (ORG-ITCL3-AP) · TH	ALLOCATED PORTABLE	—	op-network@inet.co.th
└ 203.151.0.0/27	32	BPE-TH	Bangkok Polyethylene Public Company Limited	ASSIGNED NON-PORTABLE	—	op-network@inet.co.th via INET-TH
└ 203.151.2.0/24	256	BPE-TH	Bangkok Polyethylene Public Company Limited	ASSIGNED NON-PORTABLE	—	op-network@inet.co.th via INET-TH
└ 203.151.9.0/25	128	OPENCARE-TH	Open Exchange for Collaborative Activities in Response to Emergencies	ASSIGNED NON-PORTABLE	—	op-network@inet.co.th via INET-TH
└ 203.151.11.0/24	256	INET-TH	INET NC Server	ASSIGNED NON-PORTABLE	—	op-network@inet.co.th via INET-TH
└ 203.151.12.64/26	64	PIBULONLINE-TH	Rajabhat Institute Pibulsongkram Phitsanulok	ASSIGNED NON-PORTABLE	—	op-network@inet.co.th via INET-TH
└ 203.151.12.128/27	32	INET-TH	Reserved for K.Trin	ALLOCATED NON-PORTABLE	—	op-network@inet.co.th via INET-TH
└ 203.151.12.160/27	32	SAWADEEWEB-TH	Sawadee web	ASSIGNED NON-PORTABLE	—	op-network@inet.co.th via INET-TH
└ 203.151.15.0/24	256	AEROTHAI-TH	Aeronautical Radio of Thailand	ASSIGNED NON-PORTABLE	—	op-network@inet.co.th via INET-TH

A contact marked “via” is the registry's: the record names none of its own, so the registry hands down its parent's.

Composition

The types across the prefix's announced space, by addresses.

Announced space

Address share

Announced space

Types across the prefix

4,096 addresses

Type	Addresses	Share	Ranges
Hosting	3,840	94%	9
Business	256	6.3%	1

Network & registry

Announcement Routing history RPKI & IRR Whois & abuse

Routing timeline

Covering aggregate above, the prefix's own history below

Summary

Routing history

Pattern: Stable
First seen: Dec 2013
Current origin since: Jan 2026 · 9 mo
Origin networks: 1

RPKI

Route origin authorizations

ROA prefix	ASN	Max len	Anchor	Verdict
203.151.0.0/19	AS4618	/20	APNIC	RPKI valid

IRR

Route objects on the exact prefix

Origin	Registry	Description	Maintainer	Modified
AS4618	APNIC	Internet Thailand Company Ltd.	MAINT-TH-INET	Jun 1, 2021
AS4618	RADB	Proxy-registered route object	MAINT-AS9304	Nov 13, 2023
AS4618	NTTCOM	Proxy-registered route object	MAINT-AS9304	Jun 24, 2020

IRR inside

Route objects inside

Prefix	Origin	Registry	Description	Maintainer	Modified
203.151.4.0/24	AS4618	RADB	Proxy-registered route object	MAINT-AS9304	Nov 13, 2023
203.151.4.0/24	AS4618	NTTCOM	Proxy-registered route object	MAINT-AS9304	Jun 24, 2020
203.151.4.0/24	AS4618	APNIC	Internet Thailand Company Ltd.	MAINT-TH-INET	Jun 1, 2021
203.151.15.0/24	AS4618	RADB	Proxy-registered route object	MAINT-AS9304	Nov 13, 2023
203.151.15.0/24	AS4618	NTTCOM	Proxy-registered route object	MAINT-AS9304	Jun 24, 2020
203.151.15.0/24	AS4618	APNIC	Internet Thailand Company Ltd.	MAINT-TH-INET	Nov 19, 2020