191.251.133.158
191.251.133.158 is an IPv4 address operated by AS18881 - TELEFONICA BRASIL S.A, BR (AS18881), with approximate network location Taboão da Serra, Brazil. It belongs to a mobile network with reverse DNS name 191.251.133.158.dynamic.adsl.gvt.net.br. As of November 13, 2026, IPDebrief rates it Low Risk (0/100); no anonymizing service was detected.
🏢 Ownership & Registration
| Registered holder | TELEFÔNICA BRASIL S.A |
| ASN | AS18881 |
| Network Name | 214474 |
| CIDR Block | 191.248.0.0/14 |
| RIR | LACNIC |
| Network registration country | BR |
| Routing operator | AS18881 - TELEFONICA BRASIL S.A, BR |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | 191.251.133.158.dynamic.adsl.gvt.net.br |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | 191.251.133.158.dynamic.adsl.gvt.net.br |
DNS Posture
Results describe the queried names. SPF, DMARC and CAA are domain policies, not requirements for every IP. DNSSEC here describes reverse DNS; inconclusive validation does not mean unsigned.
Not assessed: 0 conclusive IP DNS checks.
| caa | Not checked |
| spf | Unknown / lookup inconclusive 191.251.133.158.dynamic.adsl.gvt.net.br |
| dmarc | Unknown / lookup inconclusive _dmarc.191.251.133.158.dynamic.adsl.gvt.net.br |
| dnssec | Unknown / lookup inconclusive 158.133.251.191.in-addr.arpa |
| fcrDns | Unknown / lookup inconclusive 191.251.133.158.dynamic.adsl.gvt.net.br |
☁️ Network Classification
| Infrastructure | Mobile |
| Service Purpose | Firewalled / No Services |
| Network Tier | Unknown — Insufficient routing data to classify |
🔌 Services & Open Ports
| Port | Service | Protocol | Banner |
|---|---|---|---|
| No open ports detected | |||
| Closed Ports | 22, 25, 80, 443, 3389, 8080, 8443 (0 open / 7 scanned) | ||
| Server | — |
| HTTP Title | — |
🔐 TLS Certificate
| SANs | None |
| Valid From | — |
| Valid Until | — |
🛡️ Public Network Snapshot
| Origin ASN | AS18881 |
| Network Prefix | 191.251.128.0/19 |
| Route mapping | Found |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 20% | 1 | 1 |
| routing | 20% | 1 | 1 |
| services | 20% | 1 | 1 |
| ownership | 0% | 0 | 0 |
| reputation | 0% | 0 | 0 |
| geolocation | 20% | 1 | 1 |
| Overall | 13% | 4 | 4 |
| Data Coherence | Consistent (100%) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-11-06 01:24:57 UTC |
| Last Seen | 2026-11-07 22:01:18 UTC |
| Profile Built | 2026-11-13 09:05:57 UTC |
| Data Freshness | Live |
| Signal Types | 17 |
| Total Observations | 21 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 191.251.133.158
Who owns the IP address 191.251.133.158?
191.251.133.158 is registered to TELEFÔNICA BRASIL S.A. The address falls within the 191.248.0.0/14 network block. Registration is held at LACNIC.
Where is 191.251.133.158 located?
Geolocation data places 191.251.133.158 in Taboão da Serra, SP, Brazil. The local time zone is America/Sao_Paulo. IP geolocation is approximate, not a precise physical address. Registration country and certificate organization addresses do not establish service location.
Is 191.251.133.158 malicious or safe?
191.251.133.158 currently carries a low risk assessment, meaning no significant threat indicators have been observed. This assessment is generated from continuously collected signals and can change over time.
What is the hostname for 191.251.133.158?
The reverse DNS (PTR) record for 191.251.133.158 is 191.251.133.158.dynamic.adsl.gvt.net.br. This hostname is not forward-confirmed, so it should be treated as a weak signal.
Is 191.251.133.158 a VPN, proxy, or data center address?
191.251.133.158 is classified as a mobile network based on network ownership and behavioural analysis.