AS3356
Lumen Technologies Inc.
Monroe, Louisiana, US
Tier-1 Transit Provider ARIN United States
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🏢 Organisation
Full nameLumen Technologies Inc.
ASNAS3356
TypeTier-1 Transit Provider
CountryUnited States
HeadquartersMonroe, Louisiana, US
Founded1997
Websitelumen.com
RegistryARIN
🌐 Network
Total IPs~40 million (IPv4)
UpstreamTier-1 — no upstream transit, peers with all backbone networks
IPv62001:1900::/28
RIRARIN
Abuse emailabuse@lumen.com
Abuse formReport abuse →
📌 IPv4 Address Ranges
4.0.0.0/9 8.0.0.0/8 63.0.0.0/8 66.0.0.0/8 209.0.0.0/8
🔁 BGP Peers
AS1299 (Telia) AS174 (Cogent) AS2914 (NTT) AS6453 (TATA) AS7018 (AT&T) AS701 (Verizon)
🔒
Your ISP can see every website you visit
A VPN encrypts your traffic and hides it from Lumen and any other ISP.
PureVPN → IPVanish →

About Lumen Technologies Inc. (AS3356)

AS3356 is Lumen Technologies (formerly Level 3 Communications) — one of the world's largest Tier-1 transit providers. Lumen's network carries a significant portion of global internet traffic as a backbone provider that other ISPs pay to route through. The 4.2.2.1-4.2.2.6 public DNS servers are operated from this ASN. Lumen also owns the CenturyLink residential ISP brand in many US regions.

What AS3356 Means for Your Privacy

Every time you visit a website, your IP address — and therefore your ISP (Lumen Technologies Inc.) — is visible to that site. Lumen Technologies Inc. as your ISP can see all unencrypted traffic passing through their network, including the domains you visit. This is standard practice for all ISPs and is typically used for network management, legal compliance, and in some cases targeted advertising.

If your device is assigned an IP in Lumen Technologies Inc.’s ranges, websites you visit will identify your connection as coming from Lumen Technologies Inc.. To prevent this, a VPN replaces your ISP-assigned IP with the VPN server’s IP, making your traffic appear to come from a different provider entirely.

Technical Notes for AS3356

AS3356 is registered with ARIN — the Regional Internet Registry responsible for IP allocations in North America. The ASN is used to announce IP prefixes to the global BGP routing table, allowing other networks to route traffic to Lumen Technologies Inc.’s infrastructure.

Lumen Technologies Inc. peers with major transit providers and internet exchanges to ensure global reachability. BGP peering relationships determine how traffic flows between Lumen Technologies Inc. and the rest of the internet.

Frequently Asked Questions About AS3356

What is the difference between Level 3 and Lumen?
They are the same company. Level 3 Communications rebranded to Lumen Technologies in 2020. The ASN number AS3356 and the underlying network infrastructure remain the same.
Why does AS3356 appear as a BGP peer for so many ISPs?
Lumen is one of a small number of Tier-1 internet backbone providers. Almost every ISP in the world either peers directly with Lumen or routes traffic through networks that do. This makes AS3356 one of the most interconnected ASNs on the internet.
Are the 4.2.2.x DNS servers reliable?
The 4.2.2.1 to 4.2.2.6 DNS servers have been operated by Lumen for over 20 years and are generally reliable. They are unofficial public DNS servers — Lumen does not advertise them — but they continue to work. For better-supported alternatives, use Google (8.8.8.8) or Cloudflare (1.1.1.1).

Learn More About IP Addresses & Privacy

Related ISPs & Networks

AS174
Cogent Communications
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AS1299
Telia Company AB
Tier-1 Transit Provider
AS7018
AT&T Services Inc.
Tier-1 ISP / Telecom

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Last updated: March 30, 2026 • Data sourced from ARIN WHOIS, BGP.he.net, and public routing tables. • Report an error

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