Mobile carrier
AS51207 Free Mobile SASASN lookup: IP ranges, prefixes and network type
AS51207 is the autonomous system number (ASN) announced by Free Mobile SAS. It announces 5 prefixes, 1,312,768 IPv4 addresses in total. Every address inside those ranges is routed by this operator, which is what makes the number the shortest answer to who runs a given address.
Directory data is unavailable at the moment, so the prefix list and the range membership counts are missing from this page. What you can see comes from the committed snapshot and is accurate as far as it goes. Try again shortly.
AS51207 at a glance
| Organisation | Free Mobile SAS |
|---|---|
| Autonomous system | AS51207 |
| Network type | Mobile carrier |
| IPv4 prefixes | Unavailable |
| IPv6 prefixes | Unavailable |
| IPv4 addresses | 1,312,768Summed across every announced prefix. IPv6 is not counted; the numbers are meaningless at that scale. |
| In known VPN ranges | Unavailable |
| In known datacenter ranges | Unavailable |
Look up an address on AS51207
Paste an address from your own logs. You get the network that announces it, the operator, and the verdict for that specific address.
What AS51207 means for detection
Addresses on Free Mobile SAS are mobile: phones and tablets behind carrier NAT. Our engine classifies them residential, with one caveat worth knowing. Carrier NAT puts thousands of subscribers behind one address, so an IP-level block here reaches far more people than intended, and rate limits keyed on the address will punish an entire city. Geolocation is coarse for the same reason.
The verdict for a single address is never settled by the ASN alone. It is the starting point, and IP Detection adds range membership, behaviour and history on top of it before it answers.
Related networks
The same page as JSON
No key and no signup. This is the endpoint this page is rendered from, so anything you read here you can script against.
curl https://ipscanner.io/v1/asn/directory/AS51207
IPScanner. AS51207 Free Mobile SAS, ASN directory. https://ipscanner.io/zh_cn/asn/as51207. Derived from MaxMind GeoLite2.