# 37.66.37.4 — IP Intelligence Summary

37.66.37.4 is an IPv4 address operated by LDCOMNET - Societe Francaise Du Radiotelephone - SFR SA, FR (AS15557), with approximate network location Marseille, France. It belongs to a mobile network with reverse DNS name 4.37.66.37.rev.sfr.net. As of November 13, 2026, IPDebrief rates it Low Risk (0/100); no anonymizing service was detected.

- Canonical page: https://ipdebrief.com/37.66.37.4
- Last updated: 2026-11-13

## Ownership

- Organization: SFR Legal Contact
- Network name: SFR-INFRA
- Allocated block: 37.66.32.0/21
- ASN: AS15557 (https://ipdebrief.com/asn/15557)
- Regional registry: RIPE
- Registered holder: SFR Legal Contact
- Routing operator: LDCOMNET - Societe Francaise Du Radiotelephone - SFR SA, FR
- Network registration country: FR
- Registrant address country: —

## Location

- City: Marseille
- Region: Provence-Alpes-Côte d'Azur
- Country: France
- Time zone: Europe/Paris

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

- 4.37.66.37.rev.sfr.net
- Forward-confirmed: yes

## DNS posture

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

- caa: Not found at queried name (net)
- spf: Unknown / lookup inconclusive (4.37.66.37.rev.sfr.net)
- dmarc: Unknown / lookup inconclusive (_dmarc.4.37.66.37.rev.sfr.net)
- dnssec: Unknown / lookup inconclusive (4.37.66.37.in-addr.arpa)
- fcrDns: Unknown / lookup inconclusive (4.37.66.37.rev.sfr.net)

## Nearby addresses

- 37.66.37.81 (https://ipdebrief.com/37.66.37.81)

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Source: IPDebrief, "37.66.37.4 IP intelligence", https://ipdebrief.com/37.66.37.4, updated 2026-11-13. Assessments are probabilistic.