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
- Isp allocation +5
- Trust score 70 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 103.146.250.0/23 | 512 |
0.4%
|
RETN Telecoms Ltd. | TW | Taipei City | Taipei |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS139903 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 |
|---|---|---|
| 103.146.250.0/23 | 4,262 | 2026-08-02 15:33:36 |
Frequently Asked Questions
What is AS139903?
AS139903 is an Autonomous System Number assigned to RETN Telecoms Ltd.. 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 AS139903 announce?
AS139903 announces 512 IPv4 addresses distributed across 1 routed CIDR prefixes. The network is registered in Taiwan.
Who operates AS139903?
AS139903 is operated by RETN Telecoms Ltd.. The organization is based in Taiwan. You can view all IP ranges and related ASNs on the organization page.
What country is AS139903 registered in?
AS139903 is registered in Taiwan. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
