# 187.34.131.123 — IP Intelligence Summary 187.34.131.123 is an IPv4 address operated by TELEFÔNICA BRASIL S.A (AS27699), geolocated to Santo André, Brazil. Its reverse DNS name is 187-34-131-123.dsl.telesp.net.br. As of October 14, 2026, IPDebrief rates it Moderate Risk (40/100); no anonymizing service was detected. - Canonical page: https://ipdebrief.com/187.34.131.123 - Last updated: 2026-10-14 ## Ownership - Organization: TELEFÔNICA BRASIL S.A - Network name: 126543 - Allocated block: 187.34.0.0/15 - ASN: AS27699 (https://ipdebrief.com/asn/27699) - Regional registry: LACNIC ## Location - City: Santo André - Region: SP - Country: Brazil - Time zone: America/Sao_Paulo ## Network classification - Infrastructure type: — - Datacenter / hosting: no - Residential: no - Mobile: no - Anycast: no - Tor exit node: no - VPN: no - Proxy: no ## Risk assessment - Assessment: Moderate Risk (40/100) - Blocklist listings: 0 - Suspicious activity indicators: no - Spam source: no ## Reverse DNS - 187-34-131-123.dsl.telesp.net.br - Forward-confirmed: no ## Analyst narrative \# IP INTELLIGENCE BRIEFING **Target:** 187.34.131.123/32 **Classification:** Low Risk / Residential ISP Infrastructure **Date:** 2026-07-25 **Analyst:** IPDebrief Intelligence Team \--- \## EXECUTIVE SUMMARY IP 187.34.131.123 is a residential telecommunications endpoint operated by TELEFÔNICA BRASIL S.A (AS27699). The IP exhibits a low overall risk profile (risk score: 15/100) with no active threat indicators. The address resolves to a firewalled endpoint with no open services, classified as residential ISP infrastructure. Historical observations indicate stable ownership and minimal threat activity. \--- \## OWNERSHIP & GEOLOCATION | Field | Value | |-------|-------| | **Organization** | TELEFÔNICA BRASIL S.A | | **ASN** | 27699 | | **CIDR Block** | 187.34.0.0/15 | | **RIR** | LACNIC | | **Country** | Brazil (BR) | | **Region/State** | São Paulo (SP) | | **City** | Santo André | | **Timezone** | America/Sao_Paulo | | **Abuse Contact** | Not listed | \--- \## NETWORK CLASSIFICATION | Attribute | Status | |-----------|--------| | **Reputation** | Low Risk | | **Risk Score** | 15/100 | | **Is Tor Exit** | False | | **Is Known Attacker** | False | | **Is Spam Source** | False | | **Is Proxy/VPN** | False | | **Is Hosting** | False | | **Is Cloud/CDN** | False | | **Service Status** | Firewalled / No Services | | **Mobile Carrier** | No | \--- \## THREAT INTELLIGENCE **Threat Indicators:** None detected **Blacklist Count:** 0 **Abuse Confidence Score:** Not applicable **Pulsedive Risk:** Not applicable **Known Campaigns:** None **Threat Feeds:** None **Control Plane Data:** \- DNSBL Listed: 1 of 8 total lists \- Route Stability: Unstable \- Operator Score: 0.1304 (Minimal) \- RPKI/Irr Consistency: Not evaluated \--- \## DNS & EMAIL REPUTATION | Field | Value | |-------|-------| | **PTR Hostname** | 187-34-131-123.dsl.telesp.net.br | | **Forward Resolution** | Confirmed | | **Email Authentication** | None (No SPF/DMARC) | | **Hosted Domains** | 0 | | **TXT Records** | 0 | \--- \## NEIGHBORHOOD ANALYSIS (Subnet: 187.34.131.0/24) | Metric | Value | |--------|-------| | **Abuse Density** | 0.1429 (14.29%) | | **Classification** | Mostly Clean | | **Total Siblings** | 7 | | **Active Siblings** | 1 | | **Threat Siblings** | 1 | | **Inherited Risk** | 2/100 | **Neighbor Risk Distribution:** \- High Risk: 0 \- Medium Risk: 3 \- Low Risk: 3 **Notable Neighbors:** \- 187.34.131.129: Risk Score 40 \- 187.34.131.182: Risk Score 40 \- 187.34.131.196: Risk Score 40 \--- \## OBSERVATION HISTORY **Total Observations:** 16 **Latest Signal:** 2026-07-25 09:42 UTC **Recent Signal Types:** 1. **Subnet Analysis** (Confidence: 75%) - Abuse density 0.1429, mostly_clean classification 2. **Geolocation** (Confidence: 95%) - Brazil, LACNIC RIR, 187.34.0.0/15 CIDR 3. **Geographic Threat** (Confidence: 75%) - Multiple threat pulses detected in region 4. **Geolocation Variance** (Confidence: 35%) - Geographic inconsistencies observed 5. **Blacklist Detection** (Confidence: 85%) - Listed on 1 of 8 threat lists (medium severity) **Temporal Analysis:** \- Ownership Changes: 0 \- Threat Persistence Days: 0 \- Is Persistently Malicious: False \- Threat Observation Count: 0 \--- \## RELATED ENTITIES 1. **Network:** 126543 (TELEFÔNICA BRASIL S.A) 2. **DNS Hostnames:** 187-34-131-123.dsl.telesp.net.br (2 associations) \--- \## TRACEROUTE ANALYSIS | Metric | Value | |--------|-------| | **Hop Count** | 16 | | **First Hop RTT** | 0.2ms | | **Last Hop RTT** | 170.1ms | | **Timed Out Hops** | 6 | | **Notable Transit** | Comcast detected in path | \--- \## RECOMMENDED ACTIONS Based on the IP's low-risk profile and residential classification, no immediate blocking actions are recommended. The IP does not exhibit characteristics of malicious infrastructure. Standard residential ISP traffic handling applies. **Firewall/Security Recommendations:** \- No blocking required \- Standard residential traffic rules apply \- Monitor if unexpected behavior is observed \--- \## ANALYST NOTES The target IP represents typical residential broadband infrastructure from a major Brazilian telecom provider. The single threat listing observed (medium severity) may represent historical or false-positive detection. The subnet shows moderate abuse density (14.29%) with three medium-risk neighbors, which is consistent with residential ISP environments. No correlation with known malicious campaigns or active threat actors was detected. **Confidence Level:** High **Threat Severity:** Low ## Nearby addresses - 187.34.131.36 (https://ipdebrief.com/187.34.131.36) - 187.34.131.95 (https://ipdebrief.com/187.34.131.95) - 187.34.131.129 (https://ipdebrief.com/187.34.131.129) - 187.34.131.136 (https://ipdebrief.com/187.34.131.136) - 187.34.131.182 (https://ipdebrief.com/187.34.131.182) - 187.34.131.186 (https://ipdebrief.com/187.34.131.186) - 187.34.131.196 (https://ipdebrief.com/187.34.131.196) --- Source: IPDebrief, "187.34.131.123 IP intelligence", https://ipdebrief.com/187.34.131.123, updated 2026-10-14. Assessments are probabilistic.