Is IP address 109.81.120.183 dangerous?

Yes, 109.81.120.183 is considered dangerous with a threat level of 8/10. It has been reported 3 times for malicious activities including . We recommend blocking this IP address.

Who owns or operates IP address 109.81.120.183?

IP address 109.81.120.183 is operated by O2 Czech Republic, a.s. (ASN 5610) and is geolocated to CZ. This information is derived from public WHOIS and geolocation databases.

Should I block IP address 109.81.120.183?

Yes, blocking 109.81.120.183 is strongly recommended. With a threat level of 8/10 and 3 security reports, this IP poses significant risk. Implement firewall rules to block incoming and outgoing traffic.

How accurate is this threat assessment for 109.81.120.183?

Our threat assessment for 109.81.120.183 has a confidence score of 42%, based on 3 independent reports from multiple independent sources. Higher confidence scores indicate more reliable assessments.

IP Address

109.81.120.183

IPv4 Public

AS5610

O2 Czech Republic, a.s.

3 Reports

Czechia Location

O2 Czech Republic, a.s. ASN 5610

3 Reports

Mixed Data Source

Substantial Risk

Threat level 8/10 for 109.81.120.183 based on 3 documented incidents.

Consistent suspicious behavior patterns. 42% confidence rating.

More threatening than 76% of monitored IPs

Threat Categories

Brute-Force 2

WP Login Brute Force 1

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 3 days indicates persistent threat actor operations.

First Observed 16. May 2026

Last Activity 19. May 2026

Recent (7 days) 0 incidents

Moderate Network Risk

The network hosting this IP (ASN 5610, operated by O2 Czech Republic, a.s.) shows moderate threat indicators. Some concerning activity has been detected from neighboring addresses.

Consider the network context when assessing this individual IP.

Security Recommendations

Configure firewall rules and intrusion detection alerts.

Long-term blocking recommended.

Reputation Summary

Threat Level 8/10 High

Critical

Activity Frequency 3/10 Low

Confidence Score 31% Medium Confidence

Confidence History

16. May 2026 - 19. May 2026

42% Current

Stable Trend

Date	Categories	Source	Confidence
19. May 2026	Brute-Force	Community	75%
16. May 2026	WP Login Brute Force	Honeypot	75%
16. May 2026	Brute-Force	Community	75%

Basic Information

IP Address: 109.81.120.183
IP Version: IPv4
Network Type: Public
Tor Network: No
Network Class: Class A

Geolocation

Country: CZ
ASN: AS5610
ISP: O2 Czech Republic, a.s.

DNS Information

Reverse DNS: 109-81-120-183.rct.o2.cz
PTR Record: Yes
Connection Type: Dynamic

Statistics

Total Reports: 3
First Reported: 16 May 2026
Last Reported: 19 May 2026, 20:22

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: AS5610

Organization: O2 Czech Republic, a.s.

Country:

Network Threat Assessment

4/10

This network has low threat indicators with minimal suspicious activity.

Network Statistics

Total IPs Monitored

103

Total Reports

25.8

Reports per IP

Network Context

This IP address belongs to O2 Czech Republic, a.s. (AS5610), which manages 4 IP addresses in our monitoring system. Out of these, 103 have been reported for suspicious activities, resulting in a network-wide threat level of 4/10.

Network notice: This network shows some suspicious activity patterns. Monitor interactions with IPs from this ASN.

Comparative Analysis

How this IP compares to others in our threat intelligence database

76 %

Global Threat Ranking

This IP is more threatening than 76% of all IPs in our database.

High Threat Percentile

Global Comparison

Compared against 199,604 reported IPs worldwide

Threat Level 8/10 avg: 5.3 ++

Total Reports 3 avg: 23 --

Network Comparison

Compared against 13 IPs in ASN 5610

Threat Level 8/10 network avg: 5.3 ++

Total Reports 3 network avg: 10 --

Network O2 Czech Republic, a.s. has overall threat level 4/10

Geographic Comparison

Compared against 148 IPs in CZ

Threat Level 8/10 country avg: 5.4 +

Total Reports 3 country avg: 25 --

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

Peak Day 16 May 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

WP Login Brute Force 1

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

Hourly Activity

Peak activity at 16:00 with 1 reports

Weekly Activity

Geographic Threat Distribution

187,273 threat incidents tracked globally • Last 24h: 18,965 Logs

FEED

Top Threat Sources

01

United States US

38,457 20.5%
02

India IN

29,090 15.5%
03

China CN

26,027 13.9%
04

Brazil BR

10,256 5.5%
05

Germany DE

7,143 3.8%
06

Singapore SG

6,476 3.5%
07

Indonesia ID

5,543 3%
08

Russia RU

4,703 2.5%
09

Pakistan PK

4,670 2.5%
10

Netherlands NL

4,357 2.3%

+40 more countries

THREAT LEVEL

LOW MED HIGH

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

12 Related IPs

5.1/10 Avg Threat

39% Avg Confidence

6 High Threat

High-risk network: Majority of related IPs are flagged

Substantial Risk

Threat Categories

Technical Details

Recommended Mitigations

Behavioral Analysis

Moderate Network Risk

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

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Parkstraße 19, 80339 München

Consultation

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