AS3910
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
- Multiple-origin (MOAS) routing anomaly −12
- Isp allocation +5
- Trust score 58 / 100
Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
About Qwest
Qwest Communications International, Inc. was a United States telecommunications carrier.
⚠ 1 MOAS prefix — multiple origin ASNs detected
All MOAS anomalies →A previously stable prefix originated by AS3910 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) |
|---|---|---|
| 97.107.230.0/24 | AS209, AS3910 | 2026-07-18 11:22:44 |
Top CIDR ranges
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS3910 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 |
|---|---|---|
| 63.159.181.0/24 | 3,369 | 2026-07-18 10:51:58 |
| 63.147.85.0/24 | 3,368 | 2026-07-18 10:51:58 |
| 65.158.30.0/24 | 3,360 | 2026-07-18 10:51:58 |
| 67.148.251.0/24 | 3,359 | 2026-07-18 10:51:58 |
| 67.148.48.0/24 | 3,346 | 2026-07-18 10:51:58 |
| 65.148.33.0/24 | 3,343 | 2026-07-18 10:51:58 |
| 67.148.66.0/24 | 3,341 | 2026-07-18 10:51:58 |
| 63.231.211.0/24 | 3,341 | 2026-07-18 10:51:58 |
| 65.154.234.0/24 | 3,338 | 2026-07-18 10:51:58 |
| 67.148.49.0/24 | 3,329 | 2026-07-18 10:51:58 |
| 63.229.104.0/24 | 3,325 | 2026-07-18 10:51:58 |
| 46.182.56.0/21 | 3,324 | 2026-07-18 10:51:58 |
| 63.228.185.0/24 | 3,323 | 2026-07-18 10:51:58 |
| 63.230.240.0/24 | 3,321 | 2026-07-18 10:51:58 |
| 63.225.65.0/24 | 3,319 | 2026-07-18 10:51:58 |
| 65.120.24.0/21 | 3,318 | 2026-07-18 10:51:58 |
| 65.152.197.0/24 | 3,314 | 2026-07-18 10:51:58 |
| 65.100.13.0/24 | 3,257 | 2026-07-18 10:51:58 |
| 185.42.152.0/22 | 3,237 | 2026-07-18 10:51:58 |
| 204.98.208.0/20 | 3,207 | 2026-07-18 10:51:58 |
| 205.168.23.0/24 | 3,204 | 2026-07-18 10:51:58 |
| 97.107.230.0/24 | 2,418 | 2026-07-18 10:51:58 |
Frequently Asked Questions
What is AS3910?
AS3910 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 AS3910 announce?
AS3910 announces 13.6K IPv4 addresses distributed across 20 routed CIDR prefixes. The network is registered in United Kingdom.
Who operates AS3910?
AS3910 is operated by CenturyLink Communications, LLC. The organization is based in United Kingdom. You can view all IP ranges and related ASNs on the organization page.
What country is AS3910 registered in?
AS3910 is registered in United Kingdom. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
