AS4651 — THAI-GATEWAY The Communications Authority of ThailandCAT

AS4651 announces 26 IPv4 prefixes covering 9,984 addresses and 1 IPv6 prefixes.

About this network

THAI-GATEWAY is Thailand's state-owned international internet gateway, originally run by the Communications Authority of Thailand (CAT) and now held by National Telecom Public Company Limited (NT).

What it's used for

• International IP transit and gateway services carrying Thai traffic to and from the rest of the world.
• Wholesale connectivity sold on to Thai ISPs and enterprises.

Notable

• The registry record moved from CAT Telecom to National Telecom after Thailand merged its two state telecom operators (CAT and TOT) into a single entity, National Telecom, in 2021. The THAI-GATEWAY handle survives from the CAT era.
• For much of Thailand's early internet history, the country's external connectivity funnelled through the CAT gateway, which is why this ASN sits so low in the number space.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 61.19.0.0/23
• 61.19.2.0/24
• 61.19.4.0/24
• 61.19.7.0/24
• 61.19.9.0/24
• 61.19.14.0/24
• 66.114.56.0/24
• 93.188.128.0/23
• 122.155.224.0/22
• 122.155.229.0/24
• 122.155.230.0/24
• 122.155.232.0/24
• 122.155.235.0/24
• 122.155.236.0/22
• 122.155.240.0/24
• 122.155.242.0/23
• 122.155.244.0/22
• 148.253.59.0/24
• 163.171.105.0/24
• 163.171.106.0/24
• 163.171.108.0/24
• 163.171.120.0/23
• 174.35.3.0/24
• 174.35.53.0/24
• 185.27.231.0/24
• 202.47.253.0/24
• 2001:c38:5000::/48

Upstream networks

• AS6939 Hurricane Electric LLC
• AS1299 Arelion Sweden AB
• AS2914 NTT America, Inc.
• AS34549 meerfarbig GmbH & Co. KG
• AS174 Cogent Communications, LLC
• AS3491 PCCW Global (HK) Ltd.
• AS38001 NewMedia Express Pte Ltd
• AS24482 SG.GS
• AS2497 Internet Initiative Japan Inc.
• AS3303 Swisscom (Schweiz) AG
• AS55720 Gigabit Hosting Sdn Bhd
• AS17639 Converge ICT Solutions Inc.
• AS37721 Virtual Technologies & Solutions
• AS37100 SEACOM Limited
• AS3741 Dimension Data
• AS3333 Reseaux IP Europeens Network Coordination Centre (RIPE NCC)
• AS50673 Serverius Holding B.V.
• AS48185 team.blue NV
• AS204092 Association GRIFON
• AS48362 Stadtwerke Feldkirch
• AS212024 Marc Schmitt
• AS6453 TATA COMMUNICATIONS (AMERICA) INC
• AS1273 IDDQD-AS
• AS20485 Joint Stock Company TransTeleCom
• AS50300 CustodianDC Limited

Downstream networks

• AS23969 TOT Public Company Limited
• AS131090 National Telecom Public Company Limited
• AS9931 National Telecom Public Company Limited
• AS4765 Pacific Internet Pte Ltd
• AS4618 Internet Thailand Company Limited
• AS9335 National Telecom Public Company Limited
• AS23884 Proen Corp Public Company Limited.
• AS131293 TOT Public Company Limited
• AS4621 UNINET-TH
• AS38450 Ministry of Infomation Communication Technology
• AS9835 Government Information Technology Services
• AS24187 KIRZ Service Provider
• AS139591 National Telecom Public Company Limited
• AS132300 NIPA TECHNOLOGY CO., LTD
• AS54994 Meteverse Limited.
• AS38794 UIH
• AS55514 Electricity Generating Authority of Thailand (EGAT)
• AS24429 Zhejiang Taobao Network Co.,Ltd
• AS135063 POP NIX COMPANY LIMITED
• AS45413 ServeNET Solution Limited Partnership
• AS140985 Global Innovative Solution Co., LTD
• AS38566 NTTCTNET
• AS56067 453 Ladplacout Jorakhaebua
• AS152127 OneAsia Data Center (BKK1) Company Limited
• AS136523 COLODEE DIGITAL NETWORK CO.,LTD.

Adjacent networks

• AS6939 Hurricane Electric LLC
• AS23969 TOT Public Company Limited
• AS9931 National Telecom Public Company Limited
• AS131090 National Telecom Public Company Limited
• AS4621 UNINET-TH
• AS174 Cogent Communications, LLC
• AS4618 Internet Thailand Company Limited
• AS4765 Pacific Internet Pte Ltd
• AS2914 NTT America, Inc.
• AS34549 meerfarbig GmbH & Co. KG
• AS1299 Arelion Sweden AB
• AS9335 National Telecom Public Company Limited
• AS23884 Proen Corp Public Company Limited.
• AS3491 PCCW Global (HK) Ltd.
• AS131293 TOT Public Company Limited
• AS204092 Association GRIFON
• AS3741 Dimension Data
• AS37100 SEACOM Limited
• AS55720 Gigabit Hosting Sdn Bhd
• AS50673 Serverius Holding B.V.
• AS2497 Internet Initiative Japan Inc.
• AS212024 Marc Schmitt
• AS37721 Virtual Technologies & Solutions
• AS3333 Reseaux IP Europeens Network Coordination Centre (RIPE NCC)
• AS3303 Swisscom (Schweiz) AG

Internet exchanges

• DE-CIX Frankfurt — Frankfurt, Germany
• LINX LON1 — London, United Kingdom
• AMS-IX Amsterdam — Amsterdam, Netherlands
• Neutral Internet Exchange — Amsterdam, Netherlands
• Equinix Internet Exchange Singapore — Singapore, Singapore
• BroadBand Internet eXchange Tokyo — Tokyo, Japan
• Coresite - Any2 West — Los Angeles, United States
• Any2 California — Los Angeles, United States
• Hong Kong Internet Exchange — Hong Kong, China
• Equinix Internet Exchange Hong Kong — Hong Kong, China
• BroadBand Internet eXchange Singapore — Singapore, Singapore
• DE-CIX ASEAN (Singapore, Malaysia, Brunei) — Singapore, Singapore
• BroadBand Internet eXchange Hong Kong — Hong Kong, China