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🔍 Check My IP Address →| IP Address | 4.2.2.1 |
| Owner / Organization | Level 3 Communications |
| Type | Public DNS Server |
| Hostname | N/A |
| ASN | AS3356 |
| ISP | Lumen Technologies |
| Location | Broomfield, Colorado, US |
| Common Ports | 53 (DNS) |
| Safe to Connect? | ✅ Yes |
What Is 4.2.2.1?
4.2.2.1 is a well-known IP address owned and operated by Level 3 Communications. It is classified as a Public DNS Server and is primarily used for: One of a series of well-known public DNS servers operated by Level 3 Communications (now Lumen Technologies). These servers predate Google DNS and were widely used before 8.8.8.8 became popular.
The address belongs to Autonomous System AS3356, registered to Lumen Technologies. If you have seen 4.2.2.1 appear in your network logs, firewall rules, or router settings, it is almost certainly legitimate traffic related to Lumen’s services.
Is 4.2.2.1 Safe?
✅ Yes, 4.2.2.1 is safe. This IP address belongs to Level 3 Communications, 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 Lumen’s services.
Who Owns 4.2.2.1?
4.2.2.1 is registered under ASN AS3356
and is allocated to Level 3 Communications.
The address resolves to the hostname N/A
and is geographically associated with Broomfield, Colorado, 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 4.2.2.1 is publicly visible and traceable back to Level 3 Communications, 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 4.2.2.1
Who owns 4.2.2.1?
Is 4.2.2.1 still reliable in 2026?
What are all the Level 3 DNS servers?
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Learn More About IP Addresses & Privacy
- How to become anonymous online (beginner guide)
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- Check your IP address instantly (free tool)
Last updated: March 27, 2026 • Data sourced from public WHOIS / ARIN / RIPE registries. Report an error