Autonomous system
AS45903 CMCTELECOM-VN CMC Telecom Infrastructure Company
Residential APNIC
Summary
CMC Telecom
residential isp vietnam broadband
CMCTELECOM-VN is operated by CMC Telecom Infrastructure Company.
What it's used for
- The address space carries static residential and enterprise connectivity, evidenced by reverse DNS entries pointing to
static.cmcti.vnacross multiple /19 and /20 blocks. - The AS announces 81,660 IPv4 addresses and 143 IPv6 prefixes, with 282 observed routing neighbours, indicating a large-scale access network providing broadband services to end-users and businesses in Vietnam.
- Traffic consists of subscriber internet access, including FTTH and leased lines, as well as data center and cloud services hosted within the operator's infrastructure.
Notable
- Registrants for the majority of prefixes are
IRT-VNNIC-APwith netnameCMCTELECOM-VN, aligning with the AS holder; some prefixes show APNIC or IANA netnames, reflecting historical allocation or specific block management. - CMC Telecom was established in 2008 as a member of CMC Technology Group and operates the first Uptime Tier III certified data center in Vietnam.
- The inventory includes a mix of /19, /20, and /21 IPv4 prefixes, with a significant portion of the address space allocated for static customer assignments.
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 8 exchanges in 5 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| DE-CIX Frankfurt | Frankfurt, Germany | 80.81.193.8 |
| AMS-IX Amsterdam | Amsterdam, Netherlands | 80.249.215.154 |
| Equinix Internet Exchange Singapore | Singapore, Singapore | 27.111.228.152 |
| Hong Kong Internet Exchange | Hong Kong, China | 123.255.92.43 |
| NetIX | Sofia, Bulgaria | 185.1.227.3 |
| Equinix Internet Exchange Hong Kong | Hong Kong, China | 2001:de8:7::4:5903:1 |
| BroadBand Internet eXchange Singapore | Singapore, Singapore | 103.231.152.250 |
| AMS-IX Hong Kong | Hong Kong, China | 103.247.139.36 |
Transit providers
49 upstream, 101 downstream and 210 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 2026-10-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 70 prefixes · 81.66K addresses IPv6 138 prefixes
| Country | Name | Prefixes |
|---|---|---|
| VN | Viet Nam | 208 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS45903- Registry name
- CMCTELECOM-VN
- Abuse contact
- hm-changed@vnnic.vn
- Registered
- 2009-11-25
- Last changed
- 2025-05-16
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 492 valid, 0 with no ROA
- ROAs
- 114 authorising AS45903
- ASPA
- no ASPA record
- IRR
- 100% registered · 492 of 492 announcements
- Route objects
- 9,364 naming AS45903
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: 432 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