Is IP address 187.72.159.104 dangerous?

Yes, 187.72.159.104 is considered dangerous with a threat level of 7/10. It has been reported 2 times for malicious activities including . We recommend blocking this IP address.

Who owns or operates IP address 187.72.159.104?

IP address 187.72.159.104 is operated by ALGAR TELECOM S/A (ASN 16735) and is geolocated to BR. This information is derived from public WHOIS and geolocation databases.

Should I block IP address 187.72.159.104?

Yes, blocking 187.72.159.104 is strongly recommended. With a threat level of 7/10 and 2 security reports, this IP poses significant risk. Implement firewall rules to block incoming and outgoing traffic.

How accurate is this threat assessment for 187.72.159.104?

Our threat assessment for 187.72.159.104 has a confidence score of 40%, based on 2 independent reports from multiple independent sources. Higher confidence scores indicate more reliable assessments.

IP Address

187.72.159.104

IPv4 Public

AS16735

ALGAR TELECOM S/A

2 Reports

Brazil Location

ALGAR TELECOM S/A ASN 16735

2 Reports

Honeypot Data Source

Significant Threat

IP 187.72.159.104 identified as significant threat (7/10) from 2 events.

Multiple malicious indicators detected. Confidence level: 40%.

More threatening than 83% of monitored IPs

Threat Categories

Brute-Force 2

Web App Attack 2

Technical Details

Brute-force attacks systematically attempt password combinations against authentication systems.

Recommended Mitigations

Implement rate limiting, account lockout policies, multi-factor authentication, and fail2ban.

Behavioral Analysis

Activity Pattern: Consistent Activity

Steady malicious activity over less than a day indicates persistent threat actor operations.

First Observed 22. August 2026

Last Activity 22. August 2026

Recent (7 days) 0 incidents

Reputable Network

This IP is hosted on a network (ASN 16735) with generally good reputation. The ISP ALGAR TELECOM S/A maintains standard security practices.

The malicious activity may represent an isolated compromised system rather than systematic abuse.

Security Recommendations

Implement rate limiting or temporary blocking measures.

Long-term blocking recommended.

Reputation Summary

Threat Level 7/10 High

High

Activity Frequency 4/10 Low

Confidence Score 32% Medium Confidence

Confidence History

22. Aug 2026

40% Current

Stable Trend

Date	Categories	Source	Confidence
22. Aug 2026	Brute-Force Web App Attack	Honeypot	75%
22. Aug 2026	Brute-Force Web App Attack	Honeypot	75%

Basic Information

IP Address: 187.72.159.104
IP Version: IPv4
Network Type: Public
Tor Network: No
Network Class: Class B

Geolocation

Country: BR
ASN: AS16735
ISP: ALGAR TELECOM S/A

DNS Information

Reverse DNS: 187-072-159-104.static.ctbctelecom.com.br
PTR Record: Yes
Connection Type: Dynamic

Statistics

Total Reports: 2
First Reported: 22 Aug 2026
Last Reported: 22 Aug 2026, 16:20

Network Reputation

Analysis of the entire network (ASN) that this IP address belongs to, providing context about the hosting provider and network-wide threat patterns.

Network Identity

ASN: AS16735

Organization: ALGAR TELECOM SA

Country:

Network Threat Assessment

1/10

This network appears to be relatively clean with very low threat indicators.

Network Statistics

Total IPs Monitored

789

Total Reports

14.9

Reports per IP

Network Context

This IP address belongs to ALGAR TELECOM SA (AS16735), which manages 53 IP addresses in our monitoring system. Out of these, 789 have been reported for suspicious activities, resulting in a network-wide threat level of 1/10.

Network status: This network appears to be well-maintained with low threat indicators.

Comparative Analysis

How this IP compares to others in our threat intelligence database

83 %

Global Threat Ranking

This IP is more threatening than 83% of all IPs in our database.

High Threat Percentile

Global Comparison

Compared against 767,977 reported IPs worldwide

Threat Level 7/10 avg: 5.8 +

Total Reports 2 avg: 9 --

Network Comparison

Compared against 419 IPs in ASN 16735

Threat Level 7/10 network avg: 5.6 +

Total Reports 2 network avg: 3 -

Network ALGAR TELECOM S/A has overall threat level 1/10

Geographic Comparison

Compared against 109,436 IPs in BR

Threat Level 7/10 country avg: 5.2 +

Total Reports 2 country avg: 3 -

Daily report activity over the last 30 days showing patterns and peaks.

Peak Day 22 Aug 2026 2 reports

Daily Average 0.1 reports/day

Most Active Saturday 2 reports

Evolution of threat level over time based on reported categories and frequency.

Initial Threat 6/10

Current Threat 6/10

Distribution of threat categories reported over time.

Top Threat Categories

Brute-Force 2

Web App Attack 2

Activity patterns showing when this IP is most active during the day and week.

Hourly Activity

Peak activity at 16:00 with 2 reports

Weekly Activity

Geographic Threat Distribution

698,538 threat incidents tracked globally • Last 24h: 23,352 Logs

FEED

Top Threat Sources

01

United States US

134,984 19.3%
02

Brazil BR THIS IP

109,432 15.7%
03

India IN

75,807 10.9%
04

China CN

43,137 6.2%
05

SC SC

29,184 4.2%
06

Netherlands NL

16,476 2.4%
07

Argentina AR

16,068 2.3%
08

Germany DE

15,831 2.3%
09

Pakistan PK

15,218 2.2%
10

Colombia CO

15,077 2.2%

+40 more countries

THREAT LEVEL

LOW MED HIGH

IPs from the same Autonomous System (AS) network provider.

20 Related IPs

9.6/10 Avg Threat

81% Avg Confidence

20 High Threat

High-risk network: Majority of related IPs are flagged

Significant Threat

Threat Categories

Technical Details

Recommended Mitigations

Behavioral Analysis

Reputable Network

Security Recommendations

Basic Information

Geolocation

DNS Information

Statistics

Network Reputation

Network Identity

Network Threat Assessment

Network Statistics

Network Context

Global Threat Ranking

Top Threat Categories

Hourly Activity

Weekly Activity

FEED

Top Threat Sources

JSON Report

Firewall Rules

iptables / netfilter

UFW (Ubuntu)

Windows Firewall

Cloudflare

nginx

Apache .htaccess

PDF Report

Analyzed high-risk IP addresses