AS45903
CMC Telecom Infrastructure Company
Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
- Baseline (neutral) 65
- Multiple-origin (MOAS) routing anomaly −12
- Isp allocation +5
- Trust score 58 / 100
Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
⚠ 2 MOAS prefixes — multiple origin ASNs detected
All MOAS anomalies →A previously stable prefix originated by AS45903 is now also announced by another ASN (MOAS — Multiple-Origin AS), detected from our RIPE RIS collectors. Often benign (anycast, multi-homing, or a recent transfer) — but it can signal a route leak or prefix hijack, so it's worth inspecting.
| Prefix | Origin ASNs | Last detected (UTC) |
|---|---|---|
| 203.205.8.0/24 | AS38732, AS45903 | 2026-07-22 02:53:17 |
| 101.99.40.0/21 | AS15084, AS45903, AS65000 | 2026-07-20 15:38:03 |
Network profile
Source: PeeringDB →Present at 10 internet exchanges: Equinix Hong Kong, Equinix Singapore, AMS-IX Hong Kong, DE-CIX Frankfurt: DE-CIX Frankfurt Peering LAN, HKIX: HKIX Peering LAN, AMS-IX, VNIX-HN, VNIX-HCM, VNIX-DN, BBIX Singapore
AS45903 — global IP footprint
Cities where AS45903 has measurable IPv4 allocation. Click any dot to open that city's page. Size and color scale with IP count.
Top CIDR ranges
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS45903 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.
| Prefix | Announcement samples | Last seen |
|---|---|---|
| 101.99.9.0/24 | 227,499 | 2026-07-21 05:06:56 |
| 113.20.117.0/24 | 163,017 | 2026-07-22 02:33:43 |
| 113.20.112.0/24 | 141,363 | 2026-07-22 02:44:39 |
| 101.99.7.0/24 | 115,712 | 2026-07-22 02:44:56 |
| 101.99.12.0/22 | 114,693 | 2026-07-22 02:44:56 |
| 101.99.12.0/23 | 114,560 | 2026-07-22 02:44:56 |
| 101.99.6.0/23 | 114,507 | 2026-07-22 02:44:56 |
| 101.99.6.0/24 | 114,350 | 2026-07-22 02:44:56 |
| 101.99.60.0/23 | 113,506 | 2026-07-22 02:44:39 |
| 203.205.46.0/24 | 75,966 | 2026-07-22 02:44:39 |
| 101.99.52.0/23 | 43,301 | 2026-07-22 02:41:03 |
| 183.91.30.0/24 | 24,168 | 2026-07-22 02:44:35 |
| 203.205.16.0/24 | 23,189 | 2026-07-22 02:41:06 |
| 45.122.249.0/24 | 22,668 | 2026-07-22 02:44:56 |
| 203.205.30.0/24 | 22,205 | 2026-07-22 02:44:56 |
| 203.205.52.0/23 | 22,197 | 2026-07-22 02:41:03 |
| 203.205.0.0/24 | 22,192 | 2026-07-22 02:44:39 |
| 203.205.54.0/23 | 22,103 | 2026-07-22 02:41:03 |
| 203.205.44.0/24 | 21,903 | 2026-07-22 02:41:03 |
| 203.205.42.0/23 | 21,637 | 2026-07-22 02:41:03 |
| 203.205.56.0/21 | 21,447 | 2026-07-22 02:40:31 |
| 113.20.114.0/23 | 21,318 | 2026-07-22 02:44:56 |
| 101.99.42.0/23 | 21,292 | 2026-07-22 02:44:56 |
| 203.205.40.0/23 | 21,114 | 2026-07-22 02:41:03 |
| 183.91.18.0/24 | 20,846 | 2026-07-22 02:44:54 |
| 183.91.24.0/21 | 20,819 | 2026-07-22 02:44:56 |
| 183.91.26.0/23 | 20,813 | 2026-07-22 02:44:56 |
| 101.99.32.0/21 | 20,671 | 2026-07-22 02:44:56 |
| 101.99.34.0/24 | 20,670 | 2026-07-22 02:44:56 |
| 101.99.35.0/24 | 20,445 | 2026-07-22 02:44:56 |
| 183.91.24.0/22 | 20,425 | 2026-07-22 02:44:56 |
| 203.205.16.0/22 | 20,241 | 2026-07-22 02:06:02 |
| 183.91.25.0/24 | 20,014 | 2026-07-22 02:44:56 |
| 183.91.30.0/23 | 19,867 | 2026-07-22 02:44:56 |
| 183.91.26.0/24 | 19,727 | 2026-07-22 02:44:56 |
| 183.91.28.0/22 | 19,593 | 2026-07-22 02:44:56 |
| 101.99.54.0/23 | 19,554 | 2026-07-22 02:41:03 |
| 183.91.28.0/23 | 19,515 | 2026-07-22 02:44:56 |
| 113.20.107.0/24 | 19,267 | 2026-07-22 02:41:06 |
| 203.205.39.0/24 | 19,011 | 2026-07-22 02:44:56 |
| 203.205.32.0/21 | 18,926 | 2026-07-22 02:44:56 |
| 183.91.20.0/22 | 18,674 | 2026-07-22 02:44:56 |
| 42.96.32.0/19 | 18,581 | 2026-07-22 02:41:06 |
| 101.99.24.0/23 | 18,487 | 2026-07-22 02:44:56 |
| 101.99.24.0/21 | 18,383 | 2026-07-22 02:44:56 |
| 101.99.12.0/24 | 18,322 | 2026-07-22 02:44:44 |
| 42.96.60.0/23 | 18,023 | 2026-07-22 02:41:06 |
| 103.63.114.0/24 | 17,880 | 2026-07-22 02:44:44 |
| 45.122.232.0/22 | 17,435 | 2026-07-22 02:41:06 |
| 42.96.54.0/24 | 17,187 | 2026-07-22 02:44:44 |
Showing top 50 of 614 announced prefixes by sample volume.
Frequently Asked Questions
What is AS45903?
AS45903 is an Autonomous System Number assigned to CMC Telecom Infrastructure Company. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).
How many IP addresses does AS45903 announce?
AS45903 announces 80.1K IPv4 addresses distributed across 54 routed CIDR prefixes. The network is registered in Vietnam.
Who operates AS45903?
AS45903 is operated by CMC Telecom Infrastructure Company. The organization is based in Vietnam. You can view all IP ranges and related ASNs on the organization page.
What country is AS45903 registered in?
AS45903 is registered in Vietnam. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
