Autonomous System

AS15557

SFR SA

ISP
Organization
SFR SA
ASN
AS15557
Country
France
Category
ISP
IP Geolocation Lookup WHOIS Lookup VPN Leak Test

What is AS15557?

AS15557 belongs to SFR SA (Société Française du Radiotéléphone), France's second-largest telecommunications operator. SFR is a subsidiary of Altice France and provides fixed broadband (SFR Box, formerly Numericable cable), mobile services, and business connectivity. SFR is the primary competitor to Orange in the French consumer broadband market.

Privacy note

If AS15557 appears in a VPN test while your VPN is connected, the VPN is not masking your real IP. SFR broadband and mobile subscribers should see their VPN provider's ASN rather than AS15557 when a VPN is correctly configured. Follow the VPN leak fix guide if SFR appears with the VPN active.

Check IPs in AS15557 with MyIPScan tools

IP Geolocation LookupSee country, city, ISP, and ASN details for any IP address. WHOIS LookupGet registrar and ownership information for this IP block. VPN Leak TestVerify your VPN is routing all traffic correctly. DNS Leak TestCheck which DNS resolvers your browser is using. Fix a VPN LeakStep-by-step guide if your ISP still appears in tests. Fix a DNS LeakStop DNS queries going to your ISP's resolvers.

Frequently asked questions about AS15557

What is AS15557?

AS15557 is the Autonomous System for SFR SA (Société Française du Radiotéléphone), France's second-largest ISP and mobile operator. SFR routes its consumer broadband and mobile traffic through this ASN.

Who owns AS15557?

AS15557 is registered to SFR SA, a subsidiary of Altice France, headquartered in Paris. SFR provides broadband under the SFR Box brand (formerly Numericable) and mobile services under the SFR brand.

Why does AS15557 appear in my VPN test?

SFR customers see AS15557 without a VPN. If AS15557 appears while a VPN is active, the VPN is leaking your real IP. Run the VPN Leak Test and follow the fix guide.

Does SFR have DNS leak risks?

Like other French ISPs, SFR routes DNS through its own resolvers by default. If SFR DNS appears in a DNS leak test while your VPN is active, enable your VPN's DNS leak protection. See the DNS leak fix guide.

How do I investigate IPs in AS15557?

Use IP Geolocation Lookup, WHOIS Lookup, or VPN Leak Test. You can also look up AS15557 in public BGP databases such as bgp.he.net.

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