Is IP address 81.223.15.237 dangerous?

81.223.15.237 presents moderate risk with a threat level of 4/10. While not critically dangerous, it has been associated with activity. Monitoring and conditional blocking is recommended.

Who owns or operates IP address 81.223.15.237?

IP address 81.223.15.237 is operated by T-Mobile Austria GmbH (ASN 8412) and is geolocated to AT. This information is derived from public WHOIS and geolocation databases.

Should I block IP address 81.223.15.237?

Blocking 81.223.15.237 is advisable for security-sensitive environments. With a threat level of 4/10, consider implementing conditional blocks or rate limiting.

How accurate is this threat assessment for 81.223.15.237?

Our threat assessment for 81.223.15.237 has a confidence score of 23%, based on 1 independent reports from multiple independent sources. Higher confidence scores indicate more reliable assessments.

IP Address

81.223.15.237

IPv4 Public

AS8412

T-Mobile Austria GmbH

1 Reports

Is this your IP address? If the cause is fixed, you can request removal. Free of charge, usually decided within 48 hours. Request delisting

Austria Location

T-Mobile Austria GmbH ASN 8412

1 Reports

Honeypot Data Source

Medium Threat

Medium risk rating 4/10 for IP 81.223.15.237 based on 1 incidents.

Suspicious behavior markers present. 23% confidence level.

More threatening than 1% of monitored IPs

Threat Categories

Email Spam 1

Technical Details

Email spam involves mass distribution of unwanted emails, often for advertising, phishing, or malware delivery.

Recommended Mitigations

Implement SPF, DKIM, DMARC, and use reputable email filtering services.

Behavioral Analysis

Activity Pattern: Consistent Activity

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

First Observed 16. September 2026

Last Activity 16. September 2026

Recent (7 days) 0 incidents

High-Risk Network Association

This IP belongs to a network (ASN 8412) with elevated threat levels. The ISP T-Mobile Austria GmbH hosts multiple reported malicious addresses, suggesting systemic security issues or permissive policies.

Network-wide patterns may indicate this is part of a larger malicious infrastructure.

Security Recommendations

Monitor traffic patterns. Review logs periodically for escalation.

Long-term blocking recommended.

Reputation Summary

Threat Level 4/10 Low

Medium

Activity Frequency 2/10 Very Low

Confidence Score 16% Low Confidence

Date	Categories	Source	Confidence
16. Sep 2026	Email Spam	Honeypot	75%

Basic Information

IP Address: 81.223.15.237
IP Version: IPv4
Network Type: Public
Tor Network: No
Network Class: Class A

Geolocation

Country: AT
ASN: AS8412
ISP: T-Mobile Austria GmbH

DNS Information

Reverse DNS: ns1.flierman.at
PTR Record: Yes
Connection Type: Static

Statistics

Total Reports: 1
First Reported: 16 Sep 2026
Last Reported: 16 Sep 2026, 12:00

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: AS8412

Organization: T-Mobile Austria GmbH

Country:

Network Threat Assessment

7/10

This network shows moderate threat levels with some malicious activity patterns.

Network Statistics

Total IPs Monitored

Total Reports

5.3

Reports per IP

Network Context

This IP address belongs to T-Mobile Austria GmbH (AS8412), which manages 6 IP addresses in our monitoring system. Out of these, 32 have been reported for suspicious activities, resulting in a network-wide threat level of 7/10.

Network warning: This network has elevated threat levels. Exercise caution when interacting with IPs from this ASN.

Comparative Analysis

How this IP compares to others in our threat intelligence database

1 %

Global Threat Ranking

This IP is more threatening than 1% of all IPs in our database.

Low Threat Percentile

Global Comparison

Compared against 832,725 reported IPs worldwide

Threat Level 4/10 avg: 6.3 -

Total Reports 1 avg: 9 --

Network Comparison

Compared against 89 IPs in ASN 8412

Threat Level 4/10 network avg: 6.5 -

Total Reports 1 network avg: 5 --

Network T-Mobile Austria GmbH has overall threat level 7/10

Geographic Comparison

Compared against 514 IPs in AT

Threat Level 4/10 country avg: 6.7 -

Total Reports 1 country avg: 9 --

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

Peak Day 16 Sep 2026 1 reports

Daily Average 0 reports/day

Most Active Wednesday 1 reports

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

Initial Threat 3/10

Current Threat 3/10

Distribution of threat categories reported over time.

Top Threat Categories

Email Spam 1

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

Hourly Activity

Peak activity at 12:00 with 1 reports

Weekly Activity

Geographic Threat Distribution

757,021 threat incidents tracked globally • Last 24h: 29,915 Logs

FEED

Top Threat Sources

01

United States US

148,159 19.6%
02

Brazil BR

111,851 14.8%
03

India IN

87,178 11.5%
04

China CN

46,071 6.1%
05

SC SC

29,252 3.9%
06

Germany DE

18,386 2.4%
07

Netherlands NL

17,983 2.4%
08

Pakistan PK

17,811 2.4%
09

Argentina AR

16,266 2.1%
10

Colombia CO

15,169 2%

+40 more countries

THREAT LEVEL

LOW MED HIGH

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

20 Related IPs

7.3/10 Avg Threat

29% Avg Confidence

14 High Threat

High-risk network: Majority of related IPs are flagged

Confidence 94%

Reports 33

Location

Medium Threat

Threat Categories

Technical Details

Recommended Mitigations

Behavioral Analysis

High-Risk Network Association

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