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
- Hosting allocation −6
- Trust score 59 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Network profile
Source: PeeringDB →Present at 6 internet exchanges: IX.br (PTT.br) São Paulo: ATM/MPLA, SAIX Saudi Arabia Riyadh, TPIX-TW, NetIX: NetIX, BIX.BG: Main, RTIX
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 45.83.248.0/22 | 1.0K |
49.7%
|
Cloud DNS Ltd | BG | — | — |
| 185.136.96.0/22 | 1.0K |
87.4%
|
Cloud DNS Ltd | BG | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS203391 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 |
|---|---|---|
| 185.136.99.0/24 | 24,194 | 2026-07-23 22:39:50 |
| 185.136.96.0/24 | 18,867 | 2026-07-23 22:39:50 |
| 185.136.98.0/24 | 17,491 | 2026-07-23 22:39:50 |
| 185.136.97.0/24 | 16,333 | 2026-07-23 22:24:47 |
| 45.83.251.0/24 | 15,237 | 2026-07-23 22:39:50 |
| 45.83.249.0/24 | 11,980 | 2026-07-23 22:24:47 |
| 45.83.250.0/24 | 10,820 | 2026-07-23 22:39:50 |
| 45.83.248.0/24 | 10,681 | 2026-07-23 22:39:50 |
Frequently Asked Questions
What is AS203391?
AS203391 is an Autonomous System Number assigned to Cloud DNS 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 AS203391 announce?
AS203391 announces 2.0K IPv4 addresses distributed across 2 routed CIDR prefixes. The network is registered in Bulgaria.
Who operates AS203391?
AS203391 is operated by Cloud DNS Ltd. The organization is based in Bulgaria. You can view all IP ranges and related ASNs on the organization page.
What country is AS203391 registered in?
AS203391 is registered in Bulgaria. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
