IPDebrief

176.31.139.18

IP Intelligence Dossier
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# IP INTELLIGENCE BRIEFING: 176.31.139.18

Date: 2026-06-22

Classification: Moderate Risk / High Abuse Neighborhood

Status: Active Threat Indicator

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## EXECUTIVE SUMMARY

IP address 176.31.139.18 is classified as Moderate Risk (Score: 40) and belongs to OVH hosting infrastructure (ASN: 16276) located in Roubaix, France. The IP is associated with the domain ahrefs.net and operates as a firewalled server with no open services. While the IP itself shows no direct malicious activity, it resides within a high-abuse subnet (176.31.139.0/24) with 75% abuse density.

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## INFRASTRUCTURE PROFILE

AttributeValue
**IP Address**176.31.139.18/32
**Risk Score**40/100
**ASN**16276 (OVH SAS)
**Organization**Ahrefs Pte Ltd Dmytro
**Location**Roubaix, France (FR)
**RIR**RIPE
**DNS**proxy-fr004-san18.ahrefs.net
**Service Status**Firewalled / No Services
**Classification**Hosting Infrastructure

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## THREAT INDICATORS

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## NEIGHBORHOOD ANALYSIS

The IP resides within subnet 176.31.139.0/24, which exhibits high abuse density (0.75).

MetricValue
**Total Subnet Siblings**32
**Active Siblings**22
**Threat Siblings**24
**Inherited Risk**30
**Abuse Classification**High Abuse

Risk Distribution of Neighbors: All 31 neighboring IPs show medium risk scores (35-50), indicating a pattern of coordinated hosting infrastructure with elevated threat presence.

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## OBSERVATION HISTORY

Total Observations: 34 signals detected

Recent Activity (2026-06-22):

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## NETWORK RELATIONSHIPS

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## RECOMMENDED ACTIONS

Based on risk profile analysis, the following security controls are recommended:

PlatformRule
**iptables**`iptables -A INPUT -s 176.31.139.18 -j DROP`
**nftables**`nft add rule inet filter input ip saddr 176.31.139.18 drop`
**nginx**`deny 176.31.139.18;`
**pfSense**`176.31.139.18/32`
**Cloudflare WAF**Block with expression: `ip.src eq 176.31.139.18`
**AWS WAF**Add address: `176.31.139.18/32`

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## ANALYST NOTES

1. Contextual Risk: While the IP itself shows no active malicious behavior, the high abuse density of the parent subnet warrants heightened scrutiny.

2. Infrastructure Pattern: The subnet shows consistent medium risk across all neighbors, suggesting legitimate hosting infrastructure with potential for misused accounts.

3. Geolocation Validation: Location data is plausible with 5 probe samples (avg RTT: 99.4ms).

4. Monitoring Priority: Medium โ€” consider blocking at perimeter, monitor for future activity changes.

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*Report generated via IPDebrief intelligence platform. All data sourced from observed signals and threat feeds.*

This summary was generated by AI and may contain inaccuracies. Verify critical details independently.

๐ŸŒ Geolocation

Country๐Ÿ‡ซ๐Ÿ‡ท France
RegionHDF
CityRoubaix
TimezoneEurope/Paris
Latitude50.70
Longitude3.18

๐Ÿข Ownership & Registration

OrganizationAhrefs Pte Ltd Dmytro
ASNAS16276
Network Nameโ€”
CIDR Block176.31.0.0/16
RIRRIPE
Countryโ€”
Abuse ContactAvailable via RDAP

๐ŸŒ DNS Intelligence

PTRproxy-fr004-san18.ahrefs.net
Forward ConfirmedNo โ€” PTR hostname does not resolve back to this IP (weak signal)
Forward Hostnamesproxy-fr004-san18.ahrefs.net

๐Ÿ” DNS Hygiene

Hygiene Score40% (Fair)
SPFNot configured
DMARCNot configured
FCrDNSNot verified
DNSSECValid
CAAPresent

โ˜๏ธ Network Classification

InfrastructureInfrastructure / Datacenter
Service PurposeFirewalled / No Services
Network TierTier 3 โ€” Basic operator with some routing infrastructure
CloudHosting

๐Ÿ”Œ Services & Open Ports

PortServiceProtocolBanner
No open ports detected
Closed Ports22, 25, 80, 443, 3389, 8080, 8443 (0 open / 7 scanned)
Serverโ€”
HTTP Titleโ€”

๐Ÿ” TLS Certificate

๐Ÿ”’
No certificate
Issued by โ€”
N/A
SANsNone
Valid Fromโ€”
Valid Untilโ€”

๐ŸŽฏ Confidence Breakdown

Per-dimension confidence scores based on source diversity and data freshness

DimensionScoreSourcesObservations
threat
31%
24
routing
20%
23
services
24%
23
ownership
22%
34
reputation
27%
13
geolocation
30%
23
Overall26%1220
Coverage: 6/6 dimensions ยท Data sufficiency: sufficient
Data CoherenceConsistent (100%)
AttributionModerate (50%)
OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid

๐Ÿ“… Observation Timeline ๐Ÿ”„ Live

First Seen2026-05-07 23:03:56 UTC
Last Seen2026-06-27 02:16:51 UTC
Profile Built2026-06-28 02:23:49 UTC
Data FreshnessLive
Signal Types27
Total Observations33
๐Ÿ” 27 signal types ยท 33 observations collected
This report is generated from 27+ independent intelligence signals including ownership records, DNS analysis, BGP routing, TLS certificates, port scanning, threat feeds, behavioral fingerprinting, and more.
Full dossier details are available via our API.
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โ„น๏ธ About This Report

All data shown is publicly available network metadata โ€” IP addresses do not reliably identify individuals. Assessments are probabilistic and should not be used as sole basis for access control decisions. To report an issue or request data review, contact admin@ipdebrief.com.