Autonomous system
AS9931 CAT-AP The Communication Authoity of Thailand, CAT
Residential APNIC Cable/DSL/ISP
Summary
CAT Telecom / National Telecom (NT)
isp residential eyeball fiber backbone
The former CAT Telecom network, now part of Thailand's state-owned National Telecom (NT) after the 2021 TOT/CAT merger, carrying internet and gateway services.
What it's used for
- Fixed broadband and internet access for Thai consumers and businesses, plus international gateway capacity.
Notable
- An "eyeball"-facing network: addresses here include consumer home connections, not just servers.
- CAT Telecom was Thailand's international/data carrier; its services now sit inside National Telecom alongside the former TOT network.
Interesting
- CAT and TOT merged into NT in 2021; see the former TOT side at AS9737.
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
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-10, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 252 prefixes · 278K addresses IPv6 190 prefixes
| Country | Name | Prefixes |
|---|---|---|
| TH | Thailand | 442 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS9931- 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
Declared
PeeringDB profile
- Name
- NT(CAT) Corporate Internet
- Also known as
- CAT ISP, CAT Corporate, CAT Enterprise Internet
- Network type
- Cable/DSL/ISP
- Scope
- Asia Pacific
- Traffic ratio
- Mostly Inbound
- Peering policy
- Open
- Present at
- 1 exchanges
- Facilities
- 4 facilities
- Website
- http://www.cat.net.th/cat-corporate/
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 100% valid · 791 valid, 0 with no ROA
- ROAs
- 660 authorising AS9931
- ASPA
- no ASPA record
- IRR
- 100% registered · 791 of 791 announcements
- Route objects
- 2,475 naming AS9931
Reputation
Classification and threat
Residential Fixed-line consumer ISP. Addresses here are homes.
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: 431 networks and 1,775 prefixes, as published 2026-10-11. 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