AS209
CenturyLink Communications, LLC
Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
- Baseline (neutral) 65
- Active-threat / abuse risk −12
- Isp allocation +5
- Trust score 58 / 100
Experimental · trust-vectors model v1.2.1 — a transparent heuristic, not a definitive verdict. How it works →
About Qwest
Qwest Communications International, Inc. was a United States telecommunications carrier.
⚠ 4 MOAS prefixes — multiple origin ASNs detected
All MOAS anomalies →A previously stable prefix originated by AS209 is now also announced by another ASN (MOAS — Multiple-Origin AS), detected from our RIPE RIS collectors. Often benign (anycast, multi-homing, or a recent transfer) — but it can signal a route leak or prefix hijack, so it's worth inspecting.
| Prefix | Origin ASNs | Last detected (UTC) |
|---|---|---|
| 198.204.121.0/24 | AS209, AS54081 | 2026-10-12 16:28:45 |
| 198.204.120.0/24 | AS209, AS54081 | 2026-10-12 16:28:45 |
| 198.204.122.0/24 | AS209, AS54081 | 2026-10-12 16:28:45 |
| 97.107.230.0/24 | AS209, AS3910 | 2026-10-12 16:28:45 |
Network profile
Source: PeeringDB →Web3 footprint
AS209 hosts 88 observed decentralized-network nodes across 4 networks. It’s a neutral signal — it does not affect the reputation score. See the full web3 node map.
AS209 — global IP footprint
Cities where AS209 has measurable IPv4 allocation. Click any dot to open that city's page. Size and color scale with IP count.
Top CIDR ranges
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS209 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.
| Prefix | Announcement samples | Last seen |
|---|---|---|
| 71.35.192.0/18 | 5,958,017 | 2026-10-12 15:02:34 |
| 209.180.202.0/23 | 469,460 | 2026-10-12 16:13:27 |
| 71.39.244.0/22 | 429,617 | 2026-10-12 16:19:43 |
| 64.91.109.0/24 | 413,666 | 2026-10-12 15:02:24 |
| 63.155.0.0/19 | 259,738 | 2026-10-12 16:17:26 |
| 207.109.253.0/24 | 201,593 | 2026-10-12 15:02:33 |
| 206.196.156.0/24 | 200,504 | 2026-10-12 15:02:32 |
| 67.41.82.0/23 | 180,575 | 2026-10-12 15:02:20 |
| 67.42.192.0/21 | 169,646 | 2026-10-12 15:02:20 |
| 71.216.200.0/21 | 164,974 | 2026-10-12 15:02:20 |
| 70.58.176.0/22 | 162,164 | 2026-10-12 15:02:20 |
| 209.181.56.0/22 | 161,002 | 2026-10-12 15:02:20 |
| 71.32.220.0/22 | 160,633 | 2026-10-12 15:02:20 |
| 208.45.96.0/22 | 160,606 | 2026-10-12 15:02:20 |
| 209.181.54.0/23 | 160,455 | 2026-10-12 15:02:20 |
| 209.180.236.0/23 | 160,392 | 2026-10-12 15:02:20 |
| 209.181.60.0/23 | 160,391 | 2026-10-12 15:02:20 |
| 70.56.16.0/20 | 160,375 | 2026-10-12 15:02:20 |
| 67.42.56.0/22 | 160,197 | 2026-10-12 15:02:20 |
| 70.58.152.0/21 | 160,131 | 2026-10-12 15:02:20 |
| 67.42.48.0/21 | 160,108 | 2026-10-12 15:02:20 |
| 130.13.128.0/19 | 160,021 | 2026-10-12 15:02:20 |
| 65.103.64.0/21 | 159,455 | 2026-10-12 15:02:20 |
| 65.100.8.0/22 | 159,443 | 2026-10-12 15:02:20 |
| 65.100.0.0/21 | 159,407 | 2026-10-12 15:02:20 |
| 65.102.124.0/22 | 159,372 | 2026-10-12 15:02:20 |
| 63.155.0.0/16 | 159,021 | 2026-10-12 15:02:20 |
| 63.224.200.0/21 | 158,716 | 2026-10-12 15:02:20 |
| 63.224.194.0/23 | 158,600 | 2026-10-12 15:02:20 |
| 63.228.224.0/23 | 158,243 | 2026-10-12 15:02:20 |
| 216.160.204.0/24 | 131,026 | 2026-10-07 00:21:15 |
| 209.180.234.0/24 | 111,615 | 2026-10-12 15:02:18 |
| 70.56.252.0/22 | 110,362 | 2026-10-12 15:02:18 |
| 67.41.84.0/24 | 109,896 | 2026-10-12 15:02:18 |
| 209.181.189.0/24 | 56,618 | 2026-10-12 15:02:20 |
| 71.36.248.0/22 | 49,739 | 2026-10-12 15:02:24 |
| 70.56.0.0/20 | 42,135 | 2026-10-12 15:02:32 |
| 63.224.232.0/21 | 42,112 | 2026-10-12 15:02:32 |
| 63.230.136.0/21 | 42,097 | 2026-10-12 15:02:32 |
| 207.108.106.0/24 | 42,093 | 2026-10-12 15:02:32 |
| 207.108.110.0/23 | 41,784 | 2026-10-12 15:02:32 |
| 209.181.122.0/24 | 35,656 | 2026-10-12 15:02:30 |
| 69.34.102.0/24 | 34,106 | 2026-10-12 16:19:47 |
| 71.2.210.0/23 | 33,899 | 2026-10-12 16:19:47 |
| 75.171.11.0/24 | 32,997 | 2026-10-12 16:19:43 |
| 67.77.37.0/24 | 32,259 | 2026-10-12 16:19:47 |
| 71.32.32.0/21 | 31,866 | 2026-10-12 16:19:54 |
| 71.39.24.0/22 | 31,864 | 2026-10-12 16:19:54 |
| 65.102.88.0/21 | 31,847 | 2026-10-12 16:19:54 |
| 63.230.144.0/21 | 31,808 | 2026-10-12 16:19:54 |
Showing top 50 of 1,630 announced prefixes by sample volume.
Frequently Asked Questions
What is AS209?
AS209 is an Autonomous System Number assigned to CenturyLink Communications, LLC. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).
How many IP addresses does AS209 announce?
AS209 announces 15.70M IPv4 addresses distributed across 6,430 routed CIDR prefixes. The network is registered in United States.
Who operates AS209?
AS209 is operated by CenturyLink Communications, LLC. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS209 registered in?
AS209 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
