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
- Trust score 65 / 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 |
|---|---|---|---|---|---|---|
| 189.28.128.0/20 | 4.1K |
4.8%
|
MINISTERIO DA SAUDE | BR | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS28291 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 |
|---|---|---|
| 189.28.136.0/24 | 38,218 | 2026-08-01 15:32:45 |
| 189.28.141.0/24 | 38,178 | 2026-08-01 15:32:45 |
| 189.28.143.0/24 | 38,141 | 2026-08-01 15:32:45 |
| 189.28.142.0/24 | 38,137 | 2026-08-01 15:32:45 |
| 189.28.128.0/20 | 38,126 | 2026-08-01 15:32:45 |
| 189.28.140.0/24 | 38,125 | 2026-08-01 15:32:45 |
| 189.28.139.0/24 | 38,105 | 2026-08-01 15:32:45 |
| 189.28.135.0/24 | 38,094 | 2026-08-01 15:32:45 |
| 189.28.137.0/24 | 38,074 | 2026-08-01 15:32:45 |
| 189.28.130.0/24 | 38,069 | 2026-08-01 15:32:45 |
| 189.28.128.0/21 | 38,063 | 2026-08-01 15:32:45 |
| 189.28.138.0/24 | 38,041 | 2026-08-01 15:32:45 |
| 189.28.137.252/30 | 65 | 2026-08-01 06:06:41 |
Frequently Asked Questions
What is AS28291?
AS28291 is an Autonomous System Number assigned to MINISTERIO DA SAUDE. 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 AS28291 announce?
AS28291 announces 4.1K IPv4 addresses distributed across 1 routed CIDR prefixes. The network is registered in Brazil.
Who operates AS28291?
AS28291 is operated by MINISTERIO DA SAUDE. The organization is based in Brazil. You can view all IP ranges and related ASNs on the organization page.
What country is AS28291 registered in?
AS28291 is registered in Brazil. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
