Autonomous system
AS4651 THAI-GATEWAY The Communications Authority of ThailandCAT
Unclassified APNIC
Summary
National Telecom Public Company Limited (THAI-GATEWAY)
transit legacy
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-GATEWAYhandle 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. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
Recorded at 13 exchanges in 7 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| DE-CIX Frankfurt | Frankfurt, Germany | 80.81.193.238 |
| LINX LON1 | London, United Kingdom | 195.66.226.99 |
| AMS-IX Amsterdam | Amsterdam, Netherlands | 80.249.210.15 |
| Neutral Internet Exchange | Amsterdam, Netherlands | 193.239.117.159 |
| Equinix Internet Exchange Singapore | Singapore, Singapore | 27.111.228.88 |
| BroadBand Internet eXchange Tokyo | Tokyo, Japan | 101.203.89.51 |
| Coresite - Any2 West | Los Angeles, United States | 206.72.210.247 |
| Any2 California | Los Angeles, United States | 206.72.210.247 |
Transit providers
43 upstream, 36 downstream and 147 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-16, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 28 prefixes · 9.98K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| TH | Thailand | 29 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS4651- Registry name
- NTPCL-AS-AP
- Registrant
- National Telecom Public Company Limited
- Abuse contact
- pitoon.p@ntplc.co.th
- Registered
- 2025-11-19
- Last changed
- 2025-11-20
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 79% valid · 30 valid, 8 with no ROA
- ROAs
- 30 authorising AS4651
- ASPA
- no ASPA record
- IRR
- 68% registered · 26 of 38 announcements 3 other origin
- Route objects
- 61 naming AS4651
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 442 networks and 1,783 prefixes, as published 2026-10-17. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere