153.242.21.128📋 Copy

IP Intelligence Briefing: 153.242.21.128/32

Date: 2026-06-07

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**1. Core Profile**

• Risk Score: 25 (Low Risk)
• Ownership:

- ASN: 4713 (OCN - NTT DOCOMO BUSINESS, Inc.)

- Registrar: APNIC

- Country: Japan (JP)

- Region: Tokyo, Wada

• Geolocation:

- Coordinates: 35.69°N, 139.65°E

- Timezone: Asia/Tokyo

- ISP: OCN (OCN IPoe)

• Threat Indicators:

- No malicious activity, spam, or known attacker associations.

- No DNSBL listings or campaign ties.

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**2. Observation History**

• Activity Trends:

- Stable over 17 observations (last 30 days).

- No spikes in scans, threats, or geolocation anomalies.

- Consistent DNS resolution to `p664129-ipoe.ipoe.ocn.ne.jp`.

• Key Metrics:

- Risk Score: 25 (unchanged).

- DNSSEC Valid: Yes.

- Route Stability: 0 changes in BGP routes.

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**3. Network Relationships**

• Primary Associations:

- Network: OCN (153.240.0.0/13)

- DNS Hostnames: `p664129-ipoe.ipoe.ocn.ne.jp` (repeatedly resolved).

- Subnet: 153.242.21.0/24 (no active siblings detected).

• No Link to:

- Malicious domains, campaigns, or known bad actors.

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**4. Neighborhood Analysis**

• Subnet: 153.242.21.0/24
• Abuse Density: 0% (no risky neighbors detected).
• Neighbor Count: 0 (isolated IP or sparse subnet).

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**5. Recommendations**

• Monitoring:

- Continue standard monitoring for unusual traffic patterns.

- Verify DNS resolution consistency for `p664129-ipoe.ipoe.ocn.ne.jp`.

• Mitigation:

- No immediate action required.

- Consider whitelisting OCN IP ranges if this IP is part of a trusted network.

Conclusion:

The IP is a legitimate, low-risk residential/business IP under OCN’s management in Tokyo, Japan. No signs of malicious activity or network compromise detected. Maintain routine monitoring for anomalies.

Source: IPDebrief Threat Intelligence Platform

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