Is IP address 221.159.21.88 dangerous?

Yes, 221.159.21.88 is considered dangerous with a threat level of 10/10. It has been reported 37 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 10/10 and 37 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 100%, based on 37 independent reports from multiple independent sources. Higher confidence scores indicate more reliable assessments.

IP Address

221.159.21.88

IPv4 Public

AS4766

Korea Telecom

37 Reports

KR Location

Korea Telecom ASN 4766

37 Reports

Honeypot Data Source

Extreme Threat

IP 221.159.21.88 classified at threat level 10/10 with 37 documented attacks.

Advanced threat indicators confirmed with 100% certainty.

More threatening than 100% of monitored IPs

Threat Categories

SSH 20

Hacking 10

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: Recent Spike

Significant activity increase over past 7 days indicates renewed threat actor interest or system compromise.

First Observed 15. May 2026

Last Activity 7. June 2026

Recent (7 days) 3 incidents

Moderate Network Risk

The network hosting this IP (ASN 4766, operated by Korea Telecom) shows moderate threat indicators. Some concerning activity has been detected from neighboring addresses.

Consider the network context when assessing this individual IP.

Security Recommendations

Proactive blocking essential. Significant operational risk detected.

Immediate monitoring recommended.

Reputation Summary

Threat Level 10/10 Critical

Critical

Activity Frequency 5/10 Moderate

Confidence Score 100% Verified

Confidence History

3. Apr 2026 - 7. Jun 2026

100% Current

Stable Trend

Date	Categories	Source	Confidence
7. Jun 2026	SSH	Honeypot	75%
7. Jun 2026	SSH	Honeypot	75%
6. Jun 2026	SSH	Honeypot	75%
26. May 2026	Hacking	Honeypot	75%
26. May 2026	Hacking	Honeypot	75%
26. May 2026	Hacking	Honeypot	75%
26. May 2026	Hacking	Honeypot	75%
26. May 2026	Hacking	Honeypot	75%
26. May 2026	Hacking	Honeypot	75%
26. May 2026	Hacking	Honeypot	75%
26. May 2026	Hacking	Honeypot	75%
26. May 2026	Hacking	Honeypot	75%
26. May 2026	Hacking	Honeypot	75%
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%

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: 37
First Reported: 29 Jan 2026
Last Reported: 7 Jun 2026, 11:34

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

5/10

This network has low threat indicators with minimal suspicious activity.

Network Statistics

930

Total IPs Monitored

17,918

Total Reports

19.3

Reports per IP

Network Context

This IP address belongs to Korea Telecom (AS4766), which manages 930 IP addresses in our monitoring system. Out of these, 17,918 have been reported for suspicious activities, resulting in a network-wide threat level of 5/10.

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

100 %

Global Threat Ranking

This IP is more threatening than 100% of all IPs in our database.

Top 10% Most Dangerous

Global Comparison

Compared against 199,353 reported IPs worldwide

Threat Level 10/10 avg: 5.3 ++

Total Reports 37 avg: 23 ++

Network Comparison

Compared against 1,014 IPs in ASN 4766

Threat Level 10/10 network avg: 5.0 ++

Total Reports 37 network avg: 18 ++

Network Korea Telecom has overall threat level 5/10

Geographic Comparison

Compared against 2,287 IPs in KR

Threat Level 10/10 country avg: 5.3 ++

Total Reports 37 country avg: 19 ++

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

Peak Day 26 May 2026 10 reports

Daily Average 0.7 reports/day

Most Active Tuesday 15 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 27

Hacking 10

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

Hourly Activity

Peak activity at 04:00 with 6 reports

Weekly Activity

Geographic Threat Distribution

187,017 threat incidents tracked globally • Last 24h: 18,967 Logs

FEED

Top Threat Sources

01

United States US

38,426 20.5%
02

India IN

28,977 15.5%
03

China CN

26,016 13.9%
04

Brazil BR

10,249 5.5%
05

Germany DE

7,139 3.8%
06

Singapore SG

6,475 3.5%
07

Indonesia ID

5,533 3%
08

Russia RU

4,701 2.5%
09

Pakistan PK

4,647 2.5%
10

Netherlands NL

4,355 2.3%

+40 more countries

THREAT LEVEL

LOW MED HIGH

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

20 Related IPs

9.8/10 Avg Threat

99% Avg Confidence

20 High Threat

High-risk network: Majority of related IPs are flagged

Extreme Threat

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

Analyzed high-risk IP addresses

reportedIP

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Consultation

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