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🇫🇷 Numericable-SFR
Numericable merged with SFR in 2014 to create a major cable and fiber operator in France, bringing high-speed cable infrastructure to millions of French homes.
Privacy on Numericable-SFR
France has a largely free and open internet (internet freedom 4/5). VPNs are fully legal to use, and ISPs are legally required to retain user data for 12 months. Online censorship is rated minimal. France privacy details →
Find Your Numericable-SFR IP Address
Your public IP is assigned by Numericable-SFR when your router or device connects, typically through DHCP or PPPoE — it is not printed anywhere on your device. The Your IP card above shows the address your current connection is using right now; for full details (location, ASN, network type, VPN detection) run the HackMyIP check or look any address up with IP Lookup. Consumer plans typically get a dynamic address that can change on reconnect or lease renewal — see static vs dynamic IP.
Numericable-SFR DNS Servers
Your router receives Numericable-SFR resolver addresses automatically over DHCP when it connects, so most customers never configure DNS at all. The exact resolver addresses vary by region and plan — check your router admin page for the values in use, or run the DNS leak test to see which resolver is answering your queries right now. Whichever resolver you use can see every domain you look up, which is why many people switch to a public resolver: see the best DNS servers compared and what your ISP can see. Some ISP-supplied routers do not allow changing DNS; in that case set it per device instead.
Does Numericable-SFR Use CGNAT?
Whether your line sits behind carrier-grade NAT depends on your plan and region, so check it yourself: compare your router WAN address with the public IP shown above. If they differ, or the WAN address falls in 100.64.0.0/10 (the shared range RFC 6598 reserves for CGNAT), you are behind CGNAT — one public IP shared by many customers, which matters for port forwarding, hosting a server, and some games. Many providers, and most mobile networks, deploy it. Classify any address with the Special-Use IP Checker or read what CGNAT is.
Numericable-SFR IP Ranges — AS21502
Numericable-SFR announces its public IP ranges under ASN 21502 in the global BGP routing table, so addresses in those prefixes trace back to this network. Browse the announced prefixes on the AS21502 page, look up a single address with IP Lookup, or read what an ASN is.
FAQ
What is Numericable-SFR ASN?
Numericable-SFR operates under ASN 21502. This Autonomous System Number identifies their network globally.
Is Numericable-SFR good for privacy?
Numericable-SFR operates in France, where ISPs must retain user data for 12 months. A VPN prevents Numericable-SFR from logging which sites you connect to.
What speed does Numericable-SFR offer?
Connection speeds on Numericable-SFR depend on your specific plan, the access technology (fiber, cable, DSL, or mobile), and your location. For an accurate figure, run a speed test on your own connection.
How do I check if an IP address belongs to Numericable-SFR?
Look the address up and check its ASN and organization: ranges Numericable-SFR announces under ASN 21502 appear in the global BGP routing table. Use the HackMyIP IP Lookup for a single address, or browse the prefixes announced under AS21502 on the ASN page.
How do I find my Numericable-SFR IP address?
Your public IP is assigned by Numericable-SFR when your router or device connects, typically through DHCP or PPPoE, so it is not printed anywhere on your device. The fastest way to see it is an external check, which shows the address the rest of the internet sees. The Your IP card on this page shows the address your current connection is using right now.
What DNS servers does Numericable-SFR use?
Your router receives Numericable-SFR resolver addresses automatically over DHCP, and the exact addresses vary by region and plan, so check your router admin page for the values in use. You can also run a live DNS leak test to see which resolver is answering your queries right now, and replace the ISP resolvers with a public resolver on your router or per device.
Does Numericable-SFR use CGNAT?
That depends on your plan and region, so check your own line: compare your router WAN address with the public IP shown on this page. If they differ, or the WAN address falls between 100.64.0.0 and 100.127.255.255 (the shared range RFC 6598 reserves for carrier-grade NAT), you are behind CGNAT. Many providers, and most mobile networks, use CGNAT to share one public IP among many customers.
Why does my Numericable-SFR IP address keep changing?
Consumer ISPs typically assign dynamic public IPs with a limited lease, and address pools are reused as leases expire, so a reconnect, a router reboot, or a lease renewal can hand you a different address. If you need an address that never changes, ask Numericable-SFR whether your plan supports a static IP.
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