# 191.251.133.158 — IP Intelligence Summary

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.

- Canonical page: https://ipdebrief.com/191.251.133.158
- Last updated: 2026-11-13

## Ownership

- Organization: TELEFÔNICA BRASIL S.A
- Network name: 214474
- Allocated block: 191.248.0.0/14
- ASN: AS18881 (https://ipdebrief.com/asn/18881)
- Regional registry: LACNIC
- Registered holder: TELEFÔNICA BRASIL S.A
- Routing operator: AS18881 - TELEFONICA BRASIL S.A, BR
- Network registration country: BR
- Registrant address country: —

## Location

- City: Taboão da Serra
- Region: SP
- Country: Brazil
- Time zone: America/Sao_Paulo

Approximate network location; registration and certificate addresses are not server-location evidence.

## Network classification

- Infrastructure type: —
- Datacenter / hosting: no
- Residential: no
- Mobile: yes
- Anycast: Unverified (not proof of unicast)
- Tor exit node: no
- VPN: no
- Proxy: no

## Risk assessment

- Assessment: Low Risk (0/100)
- Blocklist listings: 0
- Suspicious activity indicators: no
- Spam source: no

## Reverse DNS

- 191.251.133.158.dynamic.adsl.gvt.net.br
- Forward-confirmed: no

## DNS posture

Mail authentication and CAA are optional domain policies, not IP-wide requirements.

- 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)

## Nearby addresses

- 191.251.133.173 (https://ipdebrief.com/191.251.133.173)

---

Source: IPDebrief, "191.251.133.158 IP intelligence", https://ipdebrief.com/191.251.133.158, updated 2026-11-13. Assessments are probabilistic.