Autonomous system
AS7643 VNPT-AS-VN Vietnam Posts and Telecommunications VNPT
Unclassified APNIC
Summary
Vietnam Posts and Telecommunications (VNPT)
isp legacy
VNPT-AS-VN is Vietnam Posts and Telecommunications Group, Vietnam's state-owned incumbent telecoms operator, headquartered in Hanoi. AS7643 is VNPT's original, low-numbered AS. It is not the company's consumer network.
What it's used for
- Static, assigned customer space. Reverse DNS across the inventory is dominated by
static.vnpt.vn, VNPT's naming for fixed assignments handed to organisations, with the rest landing on the customers themselves: corporate mail servers, government-agency hosts such as an immigration-department MTA, and even other Vietnamese ISPs numbered out of VNPT space. - Roughly 20,000 IPv4 addresses across about 80 prefixes, mostly in
203.162.0.0/16and123.30.0.0/16. It announces no IPv6.
Notable
- This is the kind trap on VNPT. The name says national incumbent, and the instinct is to file it as a consumer eyeball network. It is not. VNPT's home-broadband and mobile subscribers are carried on AS45899, which holds over sixteen million addresses; AS7643 sits alongside it with two peers and two upstreams and carries leased, static business and government assignments.
- Because the addresses are delegated to end organisations, an address here should be read as a Vietnamese company or public body, not as a household and not as VNPT itself.
Interesting
- Both ASNs answer to the name
VNPT-AS-VNand AS7643's registry objects are maintained by AS45899's maintainer. The two are easy to conflate, and any classifier that treats the low number as the flagship network gets both the kind and the scale wrong.
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 2026-10-12, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 47 prefixes · 19.46K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| VN | Viet Nam | 47 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS7643- Registry name
- VNPT-AS-VN
- Abuse contact
- hm-changed@vnnic.vn
- Registered
- 2008-09-04
- Last changed
- 2018-01-25
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 93% valid · 74 valid, 4 with no ROA 2 RPKI-invalid
- ROAs
- 50 authorising AS7643
- ASPA
- no ASPA record
- IRR
- 98% registered · 78 of 80 announcements 2 other origin
- Route objects
- 618 naming AS7643
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 1,769 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