Is IP address 81.136.223.159 dangerous?

Yes, 81.136.223.159 is considered dangerous with a threat level of 10/10. It has been reported 5 times for malicious activities including . We recommend blocking this IP address.

Who owns or operates IP address 81.136.223.159?

IP address 81.136.223.159 is operated by British Telecommunications Limited (ASN 2856) and is geolocated to GB. This information is derived from public WHOIS and geolocation databases.

Should I block IP address 81.136.223.159?

Yes, blocking 81.136.223.159 is strongly recommended. With a threat level of 10/10 and 5 security reports, this IP poses significant risk. Implement firewall rules to block incoming and outgoing traffic.

How accurate is this threat assessment for 81.136.223.159?

Our threat assessment for 81.136.223.159 has a confidence score of 62%, based on 5 independent reports from multiple independent sources. Higher confidence scores indicate more reliable assessments.

IP Address

81.136.223.159

IPv4 Public

AS2856

British Telecommunications Limited

5 Reports

United Kingdom Location

British Telecommunication... ASN 2856

5 Reports

Honeypot Data Source

Critical Alert

Security alert: 81.136.223.159 rated 10/10 based on 5 verified incidents.

Threat profile indicates sustained malicious activity with 62% confidence rating.

More threatening than 93% of monitored IPs

Threat Categories

Exploited Host 5

Technical Details

This IP belongs to a compromised system being used as an attack platform without the owner's knowledge.

Recommended Mitigations

Block the IP and consider notifying the hosting provider or system owner about the compromise.

Behavioral Analysis

Activity Pattern: Consistent Activity

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

First Observed 27. July 2026

Last Activity 27. July 2026

Recent (7 days) 0 incidents

Reputable Network

This IP is hosted on a network (ASN 2856) with generally good reputation. The ISP British Telecommunications Limited maintains standard security practices.

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

Security Recommendations

Implement immediate countermeasures. Well-resourced threat actor identified.

Long-term blocking recommended.

Reputation Summary

Threat Level 10/10 Critical

Critical

Activity Frequency 5/10 Moderate

Confidence Score 49% Medium Confidence

Confidence History

22. Jul 2026 - 27. Jul 2026

62% Current

Stable Trend

Date	Categories	Source	Confidence
27. Jul 2026	Exploited Host	Honeypot	75%
27. Jul 2026	Exploited Host	Honeypot	75%
23. Jul 2026	Exploited Host	Honeypot	75%
23. Jul 2026	Exploited Host	Honeypot	75%
22. Jul 2026	Exploited Host	Honeypot	75%

Basic Information

IP Address: 81.136.223.159
IP Version: IPv4
Network Type: Public
Tor Network: No
Network Class: Class A

Geolocation

Country: GB
ASN: AS2856
ISP: British Telecommunications Limited

DNS Information

Reverse DNS: host81-136-223-159.in-addr.btopenworld.com
PTR Record: Yes
Connection Type: Dynamic

Statistics

Total Reports: 5
First Reported: 22 Jul 2026
Last Reported: 27 Jul 2026, 14:25

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: AS2856

Organization: British Telecommunications PLC

Country:

Network Threat Assessment

2/10

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

Network Statistics

Total IPs Monitored

420

Total Reports

10.5

Reports per IP

Network Context

This IP address belongs to British Telecommunications PLC (AS2856), which manages 40 IP addresses in our monitoring system. Out of these, 420 have been reported for suspicious activities, resulting in a network-wide threat level of 2/10.

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

93 %

Global Threat Ranking

This IP is more threatening than 93% of all IPs in our database.

Top 10% Most Dangerous

Global Comparison

Compared against 389,879 reported IPs worldwide

Threat Level 10/10 avg: 6.0 ++

Total Reports 5 avg: 15 --

Network Comparison

Compared against 375 IPs in ASN 2856

Threat Level 10/10 network avg: 6.1 ++

Total Reports 5 network avg: 2 ++

Network British Telecommunications Limited has overall threat level 2/10

Geographic Comparison

Compared against 6,991 IPs in GB

Threat Level 10/10 country avg: 6.1 ++

Total Reports 5 country avg: 22 --

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

Peak Day 27 Jul 2026 2 reports

Daily Average 0.1 reports/day

Most Active Monday 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

Exploited Host 5

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

Hourly Activity

Peak activity at 14:00 with 2 reports

Weekly Activity

Geographic Threat Distribution

362,192 threat incidents tracked globally • Last 24h: 17,983 Logs

FEED

Top Threat Sources

01

United States US

86,791 24%
02

India IN

56,125 15.5%
03

China CN

38,672 10.7%
04

Brazil BR

29,251 8.1%
05

Germany DE

11,783 3.3%
06

Pakistan PK

9,810 2.7%
07

Indonesia ID

9,311 2.6%
08

Singapore SG

9,064 2.5%
09

France FR

7,271 2%
10

Russia RU

7,263 2%

+40 more countries

THREAT LEVEL

LOW MED HIGH

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

20 Related IPs

9.3/10 Avg Threat

77% Avg Confidence

20 High Threat

High-risk network: Majority of related IPs are flagged

Critical Alert

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

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