# 187.255.99.133 — IP Intelligence Summary

187.255.99.133 is an IPv4 address operated by AS28573 - Claro NXT Telecomunicacoes Ltda, BR (AS28573), with approximate network location Guarulhos, Brazil. It belongs to a mobile network with reverse DNS name bbff6385.virtua.com.br. As of November 13, 2026, IPDebrief rates it Low Risk (0/100); no anonymizing service was detected.

- Canonical page: https://ipdebrief.com/187.255.99.133
- Last updated: 2026-11-13

## Ownership

- Organization: Claro NXT Telecomunicacoes Ltda
- Network name: 230242
- Allocated block: 187.255.0.0/16
- ASN: AS28573 (https://ipdebrief.com/asn/28573)
- Regional registry: LACNIC
- Registered holder: Claro NXT Telecomunicacoes Ltda
- Routing operator: AS28573 - Claro NXT Telecomunicacoes Ltda, BR
- Network registration country: BR
- Registrant address country: —

## Location

- City: Guarulhos
- 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: Residential
- Datacenter / hosting: no
- Residential: yes
- 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

- bbff6385.virtua.com.br
- Forward-confirmed: no

## DNS posture

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

- caa: Not found at queried name (br)
- spf: Unknown / lookup inconclusive (bbff6385.virtua.com.br)
- dmarc: Unknown / lookup inconclusive (_dmarc.bbff6385.virtua.com.br)
- dnssec: Unknown / lookup inconclusive (133.99.255.187.in-addr.arpa)
- fcrDns: Unknown / lookup inconclusive (bbff6385.virtua.com.br)

## Nearby addresses

- 187.255.99.66 (https://ipdebrief.com/187.255.99.66)
- 187.255.99.183 (https://ipdebrief.com/187.255.99.183)
- 187.255.99.216 (https://ipdebrief.com/187.255.99.216)

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Source: IPDebrief, "187.255.99.133 IP intelligence", https://ipdebrief.com/187.255.99.133, updated 2026-11-13. Assessments are probabilistic.