AS28171
S. O. do Brasil Telecomunicacoes LTDA ME
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 AS28171 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) |
|---|---|---|
| 177.137.240.0/21 | AS2, AS28171 | 2026-07-22 21:38:23 |
| 189.84.176.0/20 | AS2, AS28171 | 2026-07-22 21:38:23 |
| 189.84.160.0/20 | AS2, AS28171 | 2026-07-22 21:38:23 |
Network profile
Source: PeeringDB →Present at 2 internet exchanges: IX.br (PTT.br) São Paulo: ATM/MPLA, IX.br (PTT.br) Rio de Janeiro: ATM/MPLA
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 179.107.128.0/19 | 8.2K |
64.6%
|
S. O. do Brasil Telecomunicacoes LTDA ME | BR | Rio de Janeiro | Volta Redonda |
| 189.84.160.0/19 | 8.2K |
50.1%
|
S. O. do Brasil Telecomunicacoes LTDA ME | BR | Rio de Janeiro | Volta Redonda |
| 177.84.64.0/21 | 2.0K |
65.0%
|
S. O. do Brasil Telecomunicacoes LTDA ME | BR | Rio de Janeiro | Volta Redonda |
| 177.137.240.0/21 | 2.0K |
73.0%
|
S. O. do Brasil Telecomunicacoes LTDA ME | BR | Rio de Janeiro | Rio de Janeiro |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS28171 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 |
|---|---|---|
| 177.84.65.0/24 | 539,152 | 2026-07-24 15:53:32 |
| 177.84.64.0/21 | 184,869 | 2026-07-24 16:13:01 |
| 179.107.128.0/19 | 181,152 | 2026-07-24 16:13:01 |
| 177.137.240.0/21 | 180,922 | 2026-07-24 16:13:01 |
| 189.84.160.0/20 | 180,313 | 2026-07-24 16:13:01 |
| 189.84.176.0/20 | 180,238 | 2026-07-24 16:13:01 |
| 177.84.71.0/24 | 147,459 | 2026-07-24 16:13:08 |
| 189.84.180.0/24 | 121,285 | 2026-07-24 15:53:41 |
| 179.107.129.0/24 | 104,661 | 2026-07-24 15:53:33 |
| 189.84.186.0/24 | 97,387 | 2026-07-24 15:53:41 |
| 179.107.128.0/24 | 68,879 | 2026-07-24 15:53:33 |
| 189.84.188.0/24 | 67,987 | 2026-07-24 15:53:41 |
| 189.84.176.0/24 | 66,109 | 2026-07-24 15:53:41 |
| 179.107.131.0/24 | 60,520 | 2026-07-24 15:53:33 |
| 179.107.130.0/24 | 51,486 | 2026-07-24 15:53:33 |
| 189.84.165.0/24 | 46,743 | 2026-07-24 15:53:41 |
| 179.107.158.0/24 | 42,531 | 2026-07-24 15:53:33 |
| 189.84.181.0/24 | 40,015 | 2026-07-24 15:53:41 |
| 189.84.173.0/24 | 37,937 | 2026-07-24 15:53:41 |
| 179.107.159.0/24 | 31,772 | 2026-07-24 15:53:33 |
| 189.84.169.0/24 | 27,347 | 2026-07-24 15:53:41 |
| 189.84.162.0/24 | 25,189 | 2026-07-24 15:53:41 |
| 189.84.187.0/24 | 22,128 | 2026-07-24 15:53:41 |
| 189.84.177.0/24 | 21,781 | 2026-07-24 15:53:41 |
| 189.84.189.0/24 | 19,695 | 2026-07-24 15:53:41 |
| 179.107.157.0/24 | 13,230 | 2026-07-24 15:53:33 |
| 189.84.191.0/24 | 11,696 | 2026-07-24 15:53:41 |
| 177.84.64.0/24 | 8,407 | 2026-07-24 15:53:32 |
| 177.84.69.0/24 | 7,498 | 2026-07-24 15:53:32 |
| 189.84.161.0/24 | 7,345 | 2026-07-24 15:53:41 |
| 189.84.167.0/24 | 6,257 | 2026-07-24 15:53:41 |
| 189.84.168.0/24 | 4,680 | 2026-07-24 15:53:41 |
| 189.84.166.0/24 | 4,526 | 2026-07-24 15:53:41 |
| 189.84.172.0/24 | 4,339 | 2026-07-24 15:53:41 |
| 189.84.171.0/24 | 4,200 | 2026-07-24 15:53:41 |
| 189.84.160.0/24 | 4,071 | 2026-07-24 15:53:41 |
| 179.107.133.0/24 | 4,027 | 2026-07-24 15:53:33 |
| 179.107.132.0/24 | 4,019 | 2026-07-24 15:53:33 |
| 189.84.164.0/24 | 3,885 | 2026-07-24 15:53:41 |
| 189.84.170.0/24 | 1,047 | 2026-07-24 15:53:41 |
| 179.107.134.0/24 | 1,042 | 2026-07-24 15:53:33 |
| 179.107.141.0/24 | 1,037 | 2026-07-24 15:53:33 |
| 189.84.163.0/24 | 1,034 | 2026-07-24 15:53:41 |
| 177.84.67.0/24 | 1,025 | 2026-07-24 15:53:32 |
| 179.107.136.0/24 | 1,021 | 2026-07-24 15:53:33 |
| 179.107.150.0/24 | 1,019 | 2026-07-24 15:53:33 |
| 179.107.135.0/24 | 1,018 | 2026-07-24 15:53:33 |
| 177.84.68.0/24 | 1,018 | 2026-07-24 15:53:32 |
| 177.84.66.0/24 | 1,015 | 2026-07-24 15:53:32 |
| 179.107.155.0/24 | 1,010 | 2026-07-24 15:53:33 |
Showing top 50 of 85 announced prefixes by sample volume.
Frequently Asked Questions
What is AS28171?
AS28171 is an Autonomous System Number assigned to S. O. do Brasil Telecomunicacoes LTDA ME. 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 AS28171 announce?
AS28171 announces 20.5K IPv4 addresses distributed across 4 routed CIDR prefixes. The network is registered in Brazil.
Who operates AS28171?
AS28171 is operated by S. O. do Brasil Telecomunicacoes LTDA ME. The organization is based in Brazil. You can view all IP ranges and related ASNs on the organization page.
What country is AS28171 registered in?
AS28171 is registered in Brazil. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
