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
- Mobile allocation +2
- Trust score 67 / 100
Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
AS51207 — global IP footprint
Cities where AS51207 has measurable IPv4 allocation. Click any dot to open that city's page. Size and color scale with IP count.
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 37.168.0.0/13 | 524.3K |
36.8%
|
Free Mobile SAS | FR | Hauts-de-France | Montauban-de-Picardie |
| 78.240.0.0/13 | 524.3K |
93.0%
|
Free Mobile SAS | FR | Rhône-Alpes | Lyon |
| 37.164.0.0/14 | 262.1K |
36.5%
|
Free Mobile SAS | FR | Provence-Alpes-Côte d'Azur | Marseille |
| 37.166.0.0/15 | 131.1K |
0.0%
|
Free Mobile SAS | FR | Provence-Alpes-Côte d'Azur | Marseille |
| 37.164.0.0/16 | 65.5K |
0.0%
|
Free Mobile SAS | IT | — | — |
| 37.165.0.0/16 | 65.5K |
0.0%
|
Free Mobile SAS | FR | Rhône-Alpes | Le Brethon |
| 37.8.160.0/19 | 8.2K |
99.3%
|
Free Mobile SAS | FR | — | — |
| 37.1.232.0/21 | 2.0K |
0.0%
|
Free Mobile SAS | FR | — | — |
| 37.8.160.0/21 | 2.0K |
0.0%
|
Free Mobile SAS | GP | — | — |
| 37.8.184.0/21 | 2.0K |
0.0%
|
Free Mobile SAS | MQ | — | — |
| 37.8.168.0/22 | 1.0K |
0.0%
|
Free Mobile SAS | FR | — | — |
| 37.8.172.0/22 | 1.0K |
0.0%
|
Free Mobile SAS | GP | — | — |
| 37.8.176.0/22 | 1.0K |
0.0%
|
Free Mobile SAS | MQ | — | — |
| 37.8.180.0/22 | 1.0K |
0.0%
|
Free Mobile SAS | FR | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS51207 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.
| Prefix | Announcement samples | Last seen |
|---|---|---|
| 37.160.0.0/12 | 7,790 | 2026-07-23 19:02:54 |
| 78.240.0.0/13 | 7,652 | 2026-07-23 19:02:54 |
| 37.1.232.0/21 | 7,625 | 2026-07-23 19:02:54 |
| 37.8.160.0/19 | 7,312 | 2026-07-23 19:02:54 |
Frequently Asked Questions
What is AS51207?
AS51207 is an Autonomous System Number assigned to Free Mobile SAS. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).
How many IP addresses does AS51207 announce?
AS51207 announces 1.32M IPv4 addresses distributed across 5 routed CIDR prefixes. The network is registered in France.
Who operates AS51207?
AS51207 is operated by Free Mobile SAS. The organization is based in France. You can view all IP ranges and related ASNs on the organization page.
What country is AS51207 registered in?
AS51207 is registered in France. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
