Autonomous system
AS63747 CPT-AS-VN Central Post and Telecommunication CPT
Unclassified ARIN
Summary
Central Post and Telecommunication
telecom isp vietnam cable
CPT-AS-VN is operated by Central Post and Telecommunication (CPT).
What it's used for
- The address space carries cable and DSL access traffic, as indicated by the PeeringDB classification of "Cable/DSL/ISP".
- The AS announces 4096 IPv4 addresses across 2 prefixes with 2 observed neighbours, a ratio consistent with an access network providing connectivity to end-users.
- Traffic from this AS consists of subscriber eyeballs and residential or small business internet access provided by CPT.
Notable
- The RDAP registrants for both announced prefixes are listed as IANA and APNIC, which is standard for allocated space in the APNIC region, while the AS holder is CPT.
- CPT is a regional telecommunications provider in Vietnam, distinct from the national operator VNPT, and operates under the oversight of the Authority of Central Posts and Telecommunications.
- The inventory consists of two /21 blocks, 45.252.240.0/21 and 103.221.224.0/21, with no IPv6 prefixes announced.
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 2026-10-13, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 2 prefixes · 4.10K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| VN | Viet Nam | 2 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS63747- Registry name
- CPT-AS-VN
- Abuse contact
- hm-changed@vnnic.vn
- Registered
- 2016-06-08
- Last changed
- 2016-06-08
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 16 valid, 0 with no ROA
- ROAs
- 10 authorising AS63747
- ASPA
- no ASPA record
- IRR
- 100% registered · 16 of 16 announcements
- Route objects
- 62 naming AS63747
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: 436 networks and 1,771 prefixes, as published 2026-10-13. 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