Autonomous system
AS9335 CAT-CLOUD-AP CAT Telecom Public Company Limited
Hosting APNIC
Summary
National Telecom (NT) — formerly CAT Telecom
isp hosting enterprise legacy
AS9335 is registered today as NTPCL-AS-AP, held by National Telecom Public Company Limited (NT), the Thai state-owned operator formed on 7 January 2021 by merging CAT Telecom and TOT. Its older handle was CAT-CLOUD-AP, and that name is the better guide to the network's actual job: it is the cloud, data-centre and business-services side of the operator, not its consumer access network.
What it's used for
The inventory is unusually fragmented for a national carrier, and that fragmentation is the tell. RIS sees 144 IPv4 prefixes carrying only about 46,336 addresses, plus 6 IPv6 prefixes, against just 3 BGP neighbours. Very few neighbours rules out a wholesale transit role. A large prefix count over a small total address count means the space is being sliced into many small blocks: the largest announcements are a handful of /19s and /20s out of 122.155.0.0, 110.78.192.0 and 61.19.240.0, but the bulk of the 144 prefixes are /24s. That is exactly what a hosting/IDC and enterprise-services network looks like, where each customer or each service gets its own small routed block. An eyeball broadband network of comparable importance would show far more addresses in far fewer, larger aggregates. The sampled reverse DNS is sparse but points the same way: 61.19.248.5 resolves to mx1.icat.co.th, an operator-run mail exchanger in CAT's legacy icat.co.th domain.
Notable
- The AS is a piece of NT, not all of NT: the parent operates fixed line, mobile, satellite, submarine cable and international gateway businesses across many other ASes.
- The
CAT-CLOUDhandle survives from before the merger and still describes the function — cloud and IDC space rather than subscriber access. - The prefix inventory includes non-APNIC-looking blocks such as
45.136.239.0/24and103.114.200.0/22alongside its legacy Thai 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
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 2026-10-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 54 prefixes · 45.06K addresses IPv6 16 prefixes
| Country | Name | Prefixes |
|---|---|---|
| TH | Thailand | 70 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS9335- 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
- 97% valid · 155 valid, 5 with no ROA
- ROAs
- 141 authorising AS9335
- ASPA
- no ASPA record
- IRR
- 100% registered · 160 of 160 announcements
- Route objects
- 503 naming AS9335
Reputation
Classification and threat
Hosting Datacenter or cloud provider. Addresses are servers, not people.
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 1,768 prefixes, as published 2026-10-12. 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