AS265181
S1 Telecomunicacoes e Sistemas de Informacao 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
- Isp allocation +5
- Trust score 70 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Network profile
Source: PeeringDB →Present at 1 internet exchange: IX.br (PTT.br) Rio de Janeiro: ATM/MPLA
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 167.249.132.0/22 | 1.0K |
0.0%
|
S1 Telecomunicacoes e Sistemas de Informacao LTDA | BR | Rio de Janeiro | Rio de Janeiro |
| 170.233.36.0/22 | 1.0K |
0.0%
|
S1 Telecomunicacoes e Sistemas de Informacao LTDA | BR | Rio de Janeiro | Rio de Janeiro |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS265181 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 |
|---|---|---|
| 170.233.36.0/22 | 17,023 | 2026-07-31 03:26:13 |
| 167.249.132.0/22 | 16,335 | 2026-07-31 03:26:11 |
| 167.249.132.0/23 | 1,381 | 2026-07-31 03:25:41 |
| 167.249.134.0/23 | 1,365 | 2026-07-31 03:25:41 |
| 170.233.36.0/23 | 1,346 | 2026-07-31 03:25:41 |
| 170.233.38.0/23 | 1,284 | 2026-07-31 03:25:41 |
| 167.249.135.0/24 | 3 | 2026-07-06 07:07:48 |
| 167.249.134.0/24 | 3 | 2026-07-06 07:07:48 |
| 170.233.36.0/24 | 3 | 2026-07-06 07:07:48 |
| 170.233.38.0/24 | 3 | 2026-07-06 07:07:48 |
| 170.233.37.0/24 | 3 | 2026-07-06 07:07:48 |
| 167.249.132.0/24 | 3 | 2026-07-06 07:07:48 |
| 167.249.133.0/24 | 3 | 2026-07-06 07:07:48 |
| 170.233.39.0/24 | 3 | 2026-07-06 07:07:48 |
Frequently Asked Questions
What is AS265181?
AS265181 is an Autonomous System Number assigned to S1 Telecomunicacoes e Sistemas de Informacao 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 AS265181 announce?
AS265181 announces 2.0K IPv4 addresses distributed across 2 routed CIDR prefixes. The network is registered in Brazil.
Who operates AS265181?
AS265181 is operated by S1 Telecomunicacoes e Sistemas de Informacao LTDA. The organization is based in Brazil. You can view all IP ranges and related ASNs on the organization page.
What country is AS265181 registered in?
AS265181 is registered in Brazil. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
