212.23.172.100
Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
- Baseline (neutral) 65
- Long-established allocation (27y) +6
- Not on any threat blocklist +5
- Has a reverse-DNS (PTR) record +5
- Isp allocation +5
- Trust score 86 / 100
Experimental · trust-vectors model v1.2.1 — a transparent heuristic, not a definitive verdict. How it works →
Reverse DNS history
How this IP's reverse DNS (PTR) has changed over time, from our scans.
Reverse-DNS changes between Jun 12, 2026 and Oct 3, 2026 were not recorded; the current PTR is shown from its earliest retained observation.
- no PTR — since at least Oct 3, 2026 → present
- caryota.palmae.jmsp.net stable — Jun 12, 2026 → Oct 3, 2026
Network Allocation for 212.23.172.100
- CIDR range
- 212.23.172.0/25
- IP range (int)
- 3,558,321,152 — 3,558,321,279
- Prefix length
- /25
- Organization
- Societe Francaise Du Radiotelephone - SFR SA
- ASN
- AS12566
- ASN name
- Societe Francaise Du Radiotelephone - SFR SA
- Location
- Marseille, Provence Alpes C Te D Azur, France
- Coordinates
- 43.343900, 5.376700
- Accuracy radius
- 500 km
- Postal code
- 13014
- Regional Internet Registry
- RIPE
- Allocated
- 1999-07-07
- Data source(s)
- maxmind_city, maxmind_country, maxmind_asn, ipinfo_lite
- Last updated
- 2026-10-02 05:26:34
BGP Routing
Live BGP anomalies →Origin AS announcing the most-specific prefix that covers this IP, observed across our RIPE RIS collectors.
Frequently Asked Questions
Who owns 212.23.172.100?
212.23.172.100 is allocated to Societe Francaise Du Radiotelephone - SFR SA (AS12566), registered in Marseille, France.
Where is 212.23.172.100 located?
The geolocation for 212.23.172.100 maps to Marseille, France based on MaxMind GeoLite2 data. Accuracy depends on the provider and may represent the ISP's regional hub rather than the exact endpoint.
What network is 212.23.172.100 on?
212.23.172.100 belongs to the 212.23.172.0/25 network block announced by AS12566. This range contains 128 addresses.
Does 212.23.172.100 have a reverse DNS record?
Reverse DNS (PTR) records are resolved live when you visit this page. If a PTR record exists, it appears in the Reverse DNS field above. PTR records map IP addresses back to hostnames and are commonly used for email authentication and network diagnostics.
Neighbors
Other addresses in the same /24.
