Is IP address 221.159.21.88 dangerous?

Yes, 221.159.21.88 is considered dangerous with a threat level of 8/10. It has been reported 24 times for malicious activities including . We recommend blocking this IP address.

Who owns or operates IP address 221.159.21.88?

IP address 221.159.21.88 is operated by Korea Telecom (ASN 4766) and is geolocated to KR. This information is derived from public WHOIS and geolocation databases.

Should I block IP address 221.159.21.88?

Yes, blocking 221.159.21.88 is strongly recommended. With a threat level of 8/10 and 24 security reports, this IP poses significant risk. Implement firewall rules to block incoming and outgoing traffic.

How accurate is this threat assessment for 221.159.21.88?

Our threat assessment for 221.159.21.88 has a confidence score of 97%, based on 24 independent reports from multiple independent sources. Higher confidence scores indicate more reliable assessments.

IP Address

221.159.21.88

IPv4 Public

AS4766

Korea Telecom

24 Reports

KR Location

Korea Telecom ASN 4766

24 Reports

Honeypot Data Source

Notable Threat

IP 221.159.21.88 rated 8/10 from 24 verified reports.

Multiple security incidents attributed to this IP. Confidence: 97%.

More threatening than 78% of monitored IPs

Threat Categories

SSH 24

Technical Details

SSH attacks attempt to gain server access through password guessing or exploitation of SSH vulnerabilities.

Recommended Mitigations

Use key-based authentication, change default ports, implement fail2ban, and disable root login.

Behavioral Analysis

Activity Pattern: Consistent Activity

Steady malicious activity over 3 weeks indicates persistent threat actor operations.

First Observed 27. April 2026

Last Activity 22. May 2026

Recent (7 days) 2 incidents

Reputable Network

This IP is hosted on a network (ASN 4766) with generally good reputation. The ISP Korea Telecom maintains standard security practices.

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

Security Recommendations

Implement appropriate security controls.

Long-term blocking recommended.

Reputation Summary

Threat Level 8/10 High

Critical

Activity Frequency 3/10 Low

Confidence Score 95% Verified

Confidence History

29. Jan 2026 - 22. May 2026

97% Current

Stable Trend

Date	Categories	Source	Confidence
22. May 2026	SSH	Honeypot	75%
19. May 2026	SSH	Honeypot	75%
16. May 2026	SSH	Honeypot	75%
15. May 2026	SSH	Honeypot	75%
15. May 2026	SSH	Honeypot	75%
15. May 2026	SSH	Honeypot	75%
15. May 2026	SSH	Honeypot	75%
29. Apr 2026	SSH	Honeypot	75%
27. Apr 2026	SSH	Honeypot	75%
14. Apr 2026	SSH	Honeypot	75%
13. Apr 2026	SSH	Honeypot	75%
8. Apr 2026	SSH	Honeypot	75%
8. Apr 2026	SSH	Honeypot	75%
7. Apr 2026	SSH	Honeypot	75%
7. Apr 2026	SSH	Honeypot	75%
6. Apr 2026	SSH	Honeypot	75%
3. Apr 2026	SSH	Honeypot	75%
30. Mar 2026	SSH	Honeypot x2	75%
26. Mar 2026	SSH	Honeypot	75%
18. Mar 2026	SSH	Honeypot	75%
12. Mar 2026	SSH	Honeypot	75%
10. Mar 2026	SSH	Honeypot	75%
30. Jan 2026	SSH	Honeypot	75%
29. Jan 2026	SSH	Honeypot	75%

Basic Information

IP Address: 221.159.21.88
IP Version: IPv4
Network Type: Public
Tor Network: No
Network Class: Class C

Geolocation

Country: KR
ASN: AS4766
ISP: Korea Telecom

DNS Information

Reverse DNS: None
PTR Record: No
Connection Type: Static

Statistics

Total Reports: 24
First Reported: 29 Jan 2026
Last Reported: 22 May 2026, 14:35

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: AS4766

Organization: Korea Telecom

Country:

Network Threat Assessment

2/10

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

Network Statistics

749

Total IPs Monitored

17,559

Total Reports

23.4

Reports per IP

Network Context

This IP address belongs to Korea Telecom (AS4766), which manages 749 IP addresses in our monitoring system. Out of these, 17,559 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

78 %

Global Threat Ranking

This IP is more threatening than 78% of all IPs in our database.

High Threat Percentile

Global Comparison

Compared against 153,971 reported IPs worldwide

Threat Level 8/10 avg: 4.8 ++

Total Reports 24 avg: 28 =

Network Comparison

Compared against 913 IPs in ASN 4766

Threat Level 8/10 network avg: 4.5 ++

Total Reports 24 network avg: 19 +

Network Korea Telecom has overall threat level 2/10

Geographic Comparison

Compared against 2,025 IPs in KR

Threat Level 8/10 country avg: 4.9 ++

Total Reports 24 country avg: 20 +

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

Peak Day 15 May 2026 4 reports

Daily Average 0.3 reports/day

Most Active Friday 7 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

SSH 24

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

Hourly Activity

Peak activity at 03:00 with 5 reports

Weekly Activity

Geographic Threat Distribution

145,499 threat incidents tracked globally • Last 24h: 18,450 Logs

FEED

Top Threat Sources

01

United States US

32,802 22.5%
02

China CN

23,513 16.2%
03

India IN

15,797 10.9%
04

Brazil BR

7,046 4.8%
05

Germany DE

6,144 4.2%
06

Singapore SG

5,766 4%
07

Indonesia ID

4,038 2.8%
08

Netherlands NL

3,761 2.6%
09

Russia RU

3,704 2.5%
10

United Kingdom GB

3,679 2.5%

+40 more countries

THREAT LEVEL

LOW MED HIGH

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

20 Related IPs

9.9/10 Avg Threat

98% Avg Confidence

20 High Threat

High-risk network: Majority of related IPs are flagged

Notable 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

reportedIP

Parkstraße 19, 80339 München

Consultation

+49-89-215505888

Report a IP

[email protected]