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🔍 Check My IP Address →| IP Address | 1.0.0.1 |
| Owner / Organization | Cloudflare Inc. |
| Type | Secondary Public DNS Server |
| Hostname | one.one.one.one |
| ASN | AS13335 |
| ISP | Cloudflare Inc. |
| Location | San Francisco, California, US |
| Common Ports | 53 (DNS), 853 (DNS-over-TLS) |
| Safe to Connect? | ✅ Yes |
What Is 1.0.0.1?
1.0.0.1 is a well-known IP address owned and operated by Cloudflare Inc.. It is classified as a Secondary Public DNS Server and is primarily used for: Cloudflare's secondary public DNS resolver. Used as a backup alongside 1.1.1.1 for maximum DNS reliability and speed.
The address belongs to Autonomous System AS13335, registered to Cloudflare Inc.. If you have seen 1.0.0.1 appear in your network logs, firewall rules, or router settings, it is almost certainly legitimate traffic related to Cloudflare’s services.
Is 1.0.0.1 Safe?
✅ Yes, 1.0.0.1 is safe. This IP address belongs to Cloudflare Inc., a reputable organization. It is not associated with malicious activity, spam, or known threat actors. Seeing it in your network traffic is normal if you use Cloudflare’s services.
Who Owns 1.0.0.1?
1.0.0.1 is registered under ASN AS13335
and is allocated to Cloudflare Inc..
The address resolves to the hostname one.one.one.one
and is geographically associated with San Francisco, California, US.
IP address ownership data is publicly available through the Regional Internet Registries (RIRs) such as ARIN, RIPE NCC, and APNIC. You can verify ownership of any IP at any time using a WHOIS lookup.
How to Protect Your Own IP Address
Just like 1.0.0.1 is publicly visible and traceable back to Cloudflare Inc., your personal IP address is visible to every website you visit. Websites, advertisers, and even bad actors can see your approximate location and ISP from your IP alone.
The easiest way to hide your IP is to use a VPN (Virtual Private Network). A VPN replaces your real IP with one of the VPN provider’s servers, making you anonymous online.
Frequently Asked Questions About 1.0.0.1
What is the difference between 1.1.1.1 and 1.0.0.1?
Should I use both 1.1.1.1 and 1.0.0.1?
Does 1.0.0.1 support DNS over HTTPS?
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Last updated: March 27, 2026 • Data sourced from public WHOIS / ARIN / RIPE registries. Report an error