Is IP address 51.91.168.77 dangerous?

Yes, 51.91.168.77 is considered dangerous with a threat level of 7/10. It has been reported 22 times for malicious activities including . We recommend blocking this IP address.

Who owns or operates IP address 51.91.168.77?

IP address 51.91.168.77 is operated by OVH SAS (ASN 16276) and is geolocated to FR. This information is derived from public WHOIS and geolocation databases.

Should I block IP address 51.91.168.77?

Yes, blocking 51.91.168.77 is strongly recommended. With a threat level of 7/10 and 22 security reports, this IP poses significant risk. Implement firewall rules to block incoming and outgoing traffic.

How accurate is this threat assessment for 51.91.168.77?

Our threat assessment for 51.91.168.77 has a confidence score of 71%, based on 22 independent reports from multiple independent sources. Higher confidence scores indicate more reliable assessments.

IP Address

51.91.168.77

IPv4 Public

AS16276

OVH SAS

22 Reports

FR Location

OVH SAS ASN 16276

22 Reports

Honeypot Data Source

Notable Threat

IP 51.91.168.77 rated 7/10 from 22 verified reports.

Multiple security incidents attributed to this IP. Confidence: 71%.

More threatening than 74% of monitored IPs

Threat Categories

Fraud VoIP 22

Technical Details

VoIP fraud exploits phone systems to make unauthorized calls, often to premium rate numbers for financial gain.

Recommended Mitigations

Implement call authentication, monitor call patterns, and restrict international/premium rate dialing.

Datacenter Infrastructure

This IP is allocated from datacenter space operated by OVH SAS. Datacenter IPs used for attacks often indicate intentional malicious infrastructure.

Purpose-provisioned attack infrastructure may represent more sophisticated threat actors.

Security Recommendations

Implement appropriate security controls.

Continue monitoring for emerging patterns.

Reputation Summary

Threat Level 7/10 High

High

Activity Frequency 0/10 Inactive

Confidence Score 65% High Confidence

Confidence History

8. Mar 2026 - 23. Mar 2026

71% Current

Stable Trend

Date	Categories	Source	Confidence
23. Mar 2026	Fraud VoIP	Honeypot	75%
22. Mar 2026	Fraud VoIP	Honeypot	75%
22. Mar 2026	Fraud VoIP	Honeypot	75%
21. Mar 2026	Fraud VoIP	Honeypot	75%
21. Mar 2026	Fraud VoIP	Honeypot	75%
21. Mar 2026	Fraud VoIP	Honeypot	75%
20. Mar 2026	Fraud VoIP	Honeypot	75%
19. Mar 2026	Fraud VoIP	Honeypot	75%
19. Mar 2026	Fraud VoIP	Honeypot	75%
18. Mar 2026	Fraud VoIP	Honeypot	75%
18. Mar 2026	Fraud VoIP	Honeypot	75%
17. Mar 2026	Fraud VoIP	Honeypot	75%
17. Mar 2026	Fraud VoIP	Honeypot	75%
16. Mar 2026	Fraud VoIP	Honeypot	75%
13. Mar 2026	Fraud VoIP	Honeypot	75%
12. Mar 2026	Fraud VoIP	Honeypot	75%
12. Mar 2026	Fraud VoIP	Honeypot	75%
11. Mar 2026	Fraud VoIP	Honeypot	75%
10. Mar 2026	Fraud VoIP	Honeypot	75%
9. Mar 2026	Fraud VoIP	Honeypot	75%
9. Mar 2026	Fraud VoIP	Honeypot	75%
8. Mar 2026	Fraud VoIP	Honeypot	75%

Basic Information

IP Address: 51.91.168.77
IP Version: IPv4
Network Type: Public
Tor Network: No
Network Class: Class A

Geolocation

Country: FR
ASN: AS16276
ISP: OVH SAS

DNS Information

Reverse DNS: mail.springerdirect.fr
PTR Record: Yes
Connection Type: Static

Statistics

Total Reports: 22
First Reported: 8 Mar 2026
Last Reported: 23 Mar 2026, 05:52

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: AS16276

Organization: OVH SAS

Country:

Network Threat Assessment

2/10

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

Network Statistics

1,385

Total IPs Monitored

33,679

Total Reports

24.3

Reports per IP

Network Context

This IP address belongs to OVH SAS (AS16276), which manages 1,385 IP addresses in our monitoring system. Out of these, 33,679 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

74 %

Global Threat Ranking

This IP is more threatening than 74% of all IPs in our database.

Above Average Threat

Global Comparison

Compared against 199,943 reported IPs worldwide

Threat Level 7/10 avg: 5.3 +

Total Reports 22 avg: 23 =

Network Comparison

Compared against 1,798 IPs in ASN 16276

Threat Level 7/10 network avg: 5.2 +

Total Reports 22 network avg: 21 =

Network OVH SAS has overall threat level 2/10

Geographic Comparison

Compared against 4,069 IPs in FR

Threat Level 7/10 country avg: 5.8 +

Total Reports 22 country avg: 31 -

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

Peak Day 0 reports

Daily Average 0 reports/day

Most Active Monday 4 reports

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

Initial Threat 5/10

Current Threat 5/10

Distribution of threat categories reported over time.

Top Threat Categories

Fraud VoIP 22

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

Hourly Activity

Peak activity at 07:00 with 6 reports

Weekly Activity

Geographic Threat Distribution

187,611 threat incidents tracked globally • Last 24h: 18,879 Logs

FEED

Top Threat Sources

01

United States US

38,485 20.5%
02

India IN

29,222 15.6%
03

China CN

26,039 13.9%
04

Brazil BR

10,262 5.5%
05

Germany DE

7,147 3.8%
06

Singapore SG

6,479 3.5%
07

Indonesia ID

5,559 3%
08

Russia RU

4,710 2.5%
09

Pakistan PK

4,702 2.5%
10

Netherlands NL

4,362 2.3%

+40 more countries

THREAT LEVEL

LOW MED HIGH

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

20 Related IPs

8.9/10 Avg Threat

100% Avg Confidence

20 High Threat

High-risk network: Majority of related IPs are flagged

Notable Threat

Threat Categories

Technical Details

Recommended Mitigations

Datacenter Infrastructure

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

Parkstraße 19, 80339 München

Consultation

+49-89-215505888

Report a IP

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