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 →
⚠ 1 MOAS prefix — multiple origin ASNs detected
All MOAS anomalies →A previously stable prefix originated by AS18403 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) |
|---|---|---|
| 163.223.13.207/32 | AS18403, AS149107 | 2026-07-20 02:07:58 |
Network profile
Source: PeeringDB →Present at 17 internet exchanges: DE-CIX Frankfurt: DE-CIX Frankfurt Peering LAN, Equinix Hong Kong, Any2West, SGIX: Peering LAN, Equinix Singapore, BBIX Hong Kong, Equinix Tokyo, JPNAP Tokyo: Peering, BBIX Tokyo, BBIX Singapore, …
Web3 footprint
AS18403 hosts 3 observed decentralized-network nodes across 1 network. It’s a neutral signal — it does not affect the reputation score. See the full web3 node map.
AS18403 — global IP footprint
Cities where AS18403 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 AS18403 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 |
|---|---|---|
| 183.80.254.0/24 | 149,326 | 2026-07-21 15:23:47 |
| 42.116.21.0/24 | 92,513 | 2026-07-21 15:23:31 |
| 42.113.188.0/24 | 70,399 | 2026-07-21 15:23:31 |
| 42.117.229.0/24 | 60,177 | 2026-07-21 15:23:49 |
| 42.119.139.0/24 | 59,676 | 2026-07-21 15:23:49 |
| 42.116.19.0/24 | 50,031 | 2026-07-21 15:22:50 |
| 42.119.184.0/22 | 49,566 | 2026-07-21 15:23:52 |
| 118.69.135.0/24 | 49,526 | 2026-07-21 15:23:52 |
| 42.114.135.0/24 | 47,648 | 2026-07-21 15:23:53 |
| 183.80.36.0/24 | 45,978 | 2026-07-21 15:23:47 |
| 1.53.133.0/24 | 45,789 | 2026-07-21 15:23:53 |
| 118.70.252.0/24 | 45,709 | 2026-07-21 15:23:52 |
| 118.68.218.0/24 | 45,215 | 2026-07-21 15:23:52 |
| 42.114.167.0/24 | 45,098 | 2026-07-21 15:23:47 |
| 42.113.10.0/24 | 44,827 | 2026-07-21 15:23:52 |
| 118.71.158.0/24 | 44,805 | 2026-07-21 15:23:52 |
| 113.22.71.0/24 | 44,757 | 2026-07-21 15:23:52 |
| 118.69.207.0/24 | 44,756 | 2026-07-21 15:23:52 |
| 118.71.195.0/24 | 44,684 | 2026-07-21 15:23:52 |
| 1.55.212.0/22 | 44,664 | 2026-07-21 15:23:52 |
| 118.69.122.0/24 | 44,630 | 2026-07-21 15:23:47 |
| 42.112.36.0/24 | 44,603 | 2026-07-21 15:23:52 |
| 42.112.35.0/24 | 44,591 | 2026-07-21 15:23:52 |
| 42.112.38.0/24 | 44,551 | 2026-07-21 15:23:52 |
| 118.69.243.0/24 | 44,540 | 2026-07-21 15:23:52 |
| 42.112.34.0/24 | 44,538 | 2026-07-21 15:23:52 |
| 118.70.225.0/24 | 44,522 | 2026-07-21 15:23:52 |
| 42.112.42.0/24 | 44,453 | 2026-07-21 15:23:52 |
| 42.112.31.0/24 | 44,343 | 2026-07-21 15:23:52 |
| 42.112.27.0/24 | 44,306 | 2026-07-21 15:23:52 |
| 42.118.168.0/23 | 44,233 | 2026-07-21 15:23:52 |
| 1.53.252.0/24 | 44,187 | 2026-07-21 15:23:52 |
| 42.112.28.0/24 | 44,172 | 2026-07-21 15:23:52 |
| 118.69.18.0/24 | 44,005 | 2026-07-21 15:23:52 |
| 42.112.26.0/24 | 43,990 | 2026-07-21 15:23:52 |
| 118.69.19.0/24 | 43,989 | 2026-07-21 15:23:52 |
| 42.119.69.0/24 | 43,969 | 2026-07-21 15:23:52 |
| 118.71.226.0/24 | 43,962 | 2026-07-21 15:23:52 |
| 42.112.25.0/24 | 43,957 | 2026-07-21 15:23:52 |
| 118.71.177.0/24 | 43,888 | 2026-07-21 15:23:52 |
| 42.112.24.0/24 | 43,887 | 2026-07-21 15:23:52 |
| 1.53.230.0/24 | 43,882 | 2026-07-21 15:23:52 |
| 118.70.253.0/24 | 43,816 | 2026-07-21 15:23:52 |
| 1.53.228.0/24 | 43,789 | 2026-07-21 15:23:52 |
| 1.54.188.0/24 | 43,776 | 2026-07-21 15:23:53 |
| 42.115.54.0/24 | 43,771 | 2026-07-21 15:23:52 |
| 1.55.73.0/24 | 43,748 | 2026-07-21 15:23:52 |
| 42.112.16.0/24 | 43,489 | 2026-07-21 15:23:52 |
| 118.68.109.0/24 | 43,367 | 2026-07-21 15:23:52 |
| 42.117.200.0/24 | 43,365 | 2026-07-21 15:23:52 |
Showing top 50 of 4,997 announced prefixes by sample volume.
Frequently Asked Questions
What is AS18403?
AS18403 is an Autonomous System Number assigned to FPT Telecom 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 AS18403 announce?
AS18403 announces 1.42M IPv4 addresses distributed across 39 routed CIDR prefixes. The network is registered in Vietnam.
Who operates AS18403?
AS18403 is operated by FPT Telecom Company. The organization is based in Vietnam. You can view all IP ranges and related ASNs on the organization page.
What country is AS18403 registered in?
AS18403 is registered in Vietnam. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
