AS28583
RuralWeb Telecomunicacoes Ltda
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 v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
⚠ 3 MOAS prefixes — multiple origin ASNs detected
All MOAS anomalies →A previously stable prefix originated by AS28583 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) |
|---|---|---|
| 187.61.80.0/21 | AS17222, AS28583 | 2026-07-31 08:54:50 |
| 200.237.64.0/20 | AS17222, AS28583 | 2026-07-31 08:54:50 |
| 187.61.64.0/20 | AS17222, AS28583 | 2026-07-31 08:54:50 |
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 187.61.64.0/20 | 4.1K |
83.9%
|
RuralWeb Telecomunicacoes Ltda | BR | — | — |
| 200.237.64.0/20 | 4.1K |
96.9%
|
RuralWeb Telecomunicacoes Ltda | BR | — | — |
| 187.61.80.0/21 | 2.0K |
89.4%
|
RuralWeb Telecomunicacoes Ltda | BR | — | — |
| 201.46.104.0/21 | 2.0K |
97.9%
|
RuralWeb Telecomunicacoes Ltda | BR | — | — |
| 201.46.122.0/23 | 512 |
99.0%
|
RuralWeb Telecomunicacoes Ltda | BR | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS28583 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 |
|---|---|---|
| 200.237.76.0/22 | 24,602 | 2026-07-31 08:19:51 |
| 187.61.80.0/22 | 24,588 | 2026-07-31 08:19:51 |
| 187.61.84.0/22 | 24,563 | 2026-07-31 08:19:51 |
| 200.237.72.0/22 | 24,561 | 2026-07-31 08:19:51 |
| 200.237.64.0/22 | 24,422 | 2026-07-31 08:19:51 |
| 200.237.68.0/22 | 24,354 | 2026-07-31 08:19:51 |
| 187.61.64.0/20 | 23,928 | 2026-07-31 08:35:42 |
| 200.237.78.0/23 | 21,949 | 2026-07-31 08:56:15 |
| 201.46.122.0/23 | 21,110 | 2026-07-30 11:21:23 |
| 201.46.104.0/21 | 19,962 | 2026-07-31 08:55:36 |
| 187.61.78.0/23 | 17,288 | 2026-07-31 08:56:15 |
| 187.61.74.0/23 | 17,276 | 2026-07-31 08:56:15 |
| 187.61.76.0/23 | 17,268 | 2026-07-31 08:56:15 |
| 187.61.80.0/21 | 6,873 | 2026-07-31 08:55:48 |
| 200.237.64.0/20 | 6,746 | 2026-07-31 08:55:48 |
| 187.61.72.0/21 | 6,572 | 2026-07-31 08:56:22 |
| 187.61.64.0/21 | 6,512 | 2026-07-31 08:56:22 |
| 200.237.64.0/21 | 6,401 | 2026-07-31 08:55:48 |
| 200.237.72.0/21 | 6,234 | 2026-07-31 08:56:22 |
Frequently Asked Questions
What is AS28583?
AS28583 is an Autonomous System Number assigned to RuralWeb Telecomunicacoes Ltda. 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 AS28583 announce?
AS28583 announces 12.8K IPv4 addresses distributed across 5 routed CIDR prefixes. The network is registered in Brazil.
Who operates AS28583?
AS28583 is operated by RuralWeb Telecomunicacoes Ltda. The organization is based in Brazil. You can view all IP ranges and related ASNs on the organization page.
What country is AS28583 registered in?
AS28583 is registered in Brazil. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
