Autonomous System

AS3910

CenturyLink Communications, LLC

CenturyLink Communications, LLC United States 🌐 centurylink.com

Announced IPs

13,568

CIDR prefixes

ASN

AS3910

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.

58/100

Caution

How this score is built

Baseline (neutral) 65
Active-threat / abuse risk −12
Isp allocation +5
Trust score 58 / 100

Experimental · trust-vectors model v1.3.0 — a transparent heuristic, not a definitive verdict. How it works →

About Qwest

Qwest Communications International, Inc. was a United States telecommunications carrier.

Founded

1995

Headquarters

Denver

Industry

telecommunications

Parent

Lumen Technologies

Official website ↗ Summary from Wikipedia, CC BY-SA 4.0 · Data from Wikidata

⚠ 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	2026-11-14 07:24:16

Top CIDR ranges

CIDR	IPs	PTR Density	Organization	Country	State	City
204.98.208.0/20	4.1K	99.1%	CenturyLink Communications, LLC	US	—	—
46.182.56.0/21	2.0K	86.8%	CenturyLink Communications, LLC	GB	—	—
65.120.24.0/21	2.0K	5.1%	CenturyLink Communications, LLC	US	—	—
204.98.216.0/21	2.0K	98.8%	CenturyLink Communications, LLC	US	—	—
46.182.60.0/22	1.0K	99.1%	CenturyLink Communications, LLC	GB	—	—
185.42.152.0/22	1.0K	76.7%	CenturyLink Communications, LLC	GB	—	—
204.98.212.0/22	1.0K	99.2%	CenturyLink Communications, LLC	US	—	—
65.120.30.0/23	512	1.2%	CenturyLink Communications, LLC	US	—	—
67.148.48.0/23	512	45.3%	CenturyLink Communications, LLC	US	—	—
185.42.152.0/23	512	99.8%	CenturyLink Communications, LLC	GB	—	—
46.182.56.0/24	256	99.2%	CenturyLink Communications, LLC	DE	—	—
46.182.57.0/24	256	99.2%	CenturyLink Communications, LLC	GB	—	—
46.182.59.0/24	256	0.0%	CenturyLink Communications, LLC	GB	—	—
63.147.85.0/24	256	8.6%	CenturyLink Communications, LLC	US	Washington	Seattle
63.159.181.0/24	256	8.6%	CenturyLink Communications, LLC	US	—	—
63.225.65.0/24	256	16.8%	CenturyLink Communications, LLC	US	Minnesota	Saint Cloud
63.228.185.0/24	256	99.2%	CenturyLink Communications, LLC	US	Idaho	Meridian
63.229.104.0/24	256	20.7%	CenturyLink Communications, LLC	US	Arizona	Surprise
63.230.240.0/24	256	100.0%	CenturyLink Communications, LLC	US	—	—
63.231.211.0/24	256	98.8%	CenturyLink Communications, LLC	US	Florida	Naples
65.100.13.0/24	256	96.5%	CenturyLink Communications, LLC	US	—	—
65.120.24.0/24	256	13.7%	CenturyLink Communications, LLC	GB	—	—
65.120.25.0/24	256	5.5%	CenturyLink Communications, LLC	DE	—	—
65.120.26.0/24	256	1.6%	CenturyLink Communications, LLC	NL	—	—
65.120.29.0/24	256	0.0%	CenturyLink Communications, LLC	US	—	—
65.148.33.0/24	256	1.6%	CenturyLink Communications, LLC	US	—	—
65.152.197.0/24	256	22.3%	CenturyLink Communications, LLC	US	—	—
65.154.234.0/24	256	0.4%	CenturyLink Communications, LLC	US	Nevada	Henderson
65.158.30.0/24	256	6.3%	CenturyLink Communications, LLC	US	—	—
67.148.48.0/24	256	25.0%	CenturyLink Communications, LLC	GB	—	—
67.148.49.0/24	256	65.6%	CenturyLink Communications, LLC	US	—	—
67.148.66.0/24	256	98.4%	CenturyLink Communications, LLC	US	Texas	Dallas
67.148.251.0/24	256	12.1%	CenturyLink Communications, LLC	US	—	—
185.42.154.0/24	256	100.0%	CenturyLink Communications, LLC	GB	—	—
204.98.208.0/24	256	98.8%	CenturyLink Communications, LLC	US	—	—
204.98.209.0/24	256	99.6%	CenturyLink Communications, LLC	GB	—	—
204.98.210.0/24	256	100.0%	CenturyLink Communications, LLC	US	—	—
204.98.211.0/24	256	99.6%	CenturyLink Communications, LLC	DE	Hesse	Frankfurt am Main
205.168.23.0/24	256	34.4%	CenturyLink Communications, LLC	US	Colorado	Wheat Ridge
46.182.58.128/25	128	100.0%	CenturyLink Communications, LLC	GB	—	—
63.147.85.128/25	128	8.6%	CenturyLink Communications, LLC	US	Washington	Seattle
63.225.65.128/25	128	17.2%	CenturyLink Communications, LLC	GB	—	—
63.231.211.0/25	128	99.2%	CenturyLink Communications, LLC	US	Florida	Naples
65.100.13.0/25	128	96.9%	CenturyLink Communications, LLC	DE	—	—
65.120.27.0/25	128	3.1%	CenturyLink Communications, LLC	US	—	—
65.120.28.0/25	128	14.8%	CenturyLink Communications, LLC	US	—	—
65.148.33.128/25	128	1.6%	CenturyLink Communications, LLC	US	—	—
65.158.30.128/25	128	6.3%	CenturyLink Communications, LLC	US	—	—
185.42.155.128/25	128	7.0%	CenturyLink Communications, LLC	GB	—	—
46.182.58.64/26	64	100.0%	CenturyLink Communications, LLC	GB	—	—
63.147.85.64/26	64	9.4%	CenturyLink Communications, LLC	US	Washington	Seattle
63.159.181.0/26	64	9.4%	CenturyLink Communications, LLC	GB	—	—
63.225.65.64/26	64	17.2%	CenturyLink Communications, LLC	GB	—	—
63.228.185.128/26	64	100.0%	CenturyLink Communications, LLC	US	Idaho	Meridian
63.229.104.64/26	64	20.3%	CenturyLink Communications, LLC	US	Arizona	Surprise
63.229.104.192/26	64	20.3%	CenturyLink Communications, LLC	US	—	—
65.100.13.192/26	64	96.9%	CenturyLink Communications, LLC	US	—	—
65.120.27.128/26	64	3.1%	CenturyLink Communications, LLC	US	—	—
65.120.28.128/26	64	15.6%	CenturyLink Communications, LLC	GB	—	—
65.148.33.64/26	64	1.6%	CenturyLink Communications, LLC	US	—	—
65.154.234.64/26	64	0.0%	CenturyLink Communications, LLC	US	Nevada	Henderson
65.154.234.128/26	64	0.0%	CenturyLink Communications, LLC	US	—	—
185.42.155.64/26	64	7.8%	CenturyLink Communications, LLC	GB	—	—
205.168.23.0/26	64	34.4%	CenturyLink Communications, LLC	US	Colorado	Wheat Ridge
46.182.58.0/27	32	100.0%	CenturyLink Communications, LLC	GB	—	—
46.182.58.32/27	32	100.0%	CenturyLink Communications, LLC	DE	Hesse	Frankfurt am Main
63.147.85.32/27	32	9.4%	CenturyLink Communications, LLC	US	—	—
63.159.181.96/27	32	9.4%	CenturyLink Communications, LLC	GB	—	—
63.159.181.128/27	32	9.4%	CenturyLink Communications, LLC	GB	—	—
63.159.181.192/27	32	9.4%	CenturyLink Communications, LLC	GB	—	—
63.225.65.0/27	32	15.6%	CenturyLink Communications, LLC	GB	—	—
63.228.185.0/27	32	100.0%	CenturyLink Communications, LLC	US	—	—
63.228.185.96/27	32	100.0%	CenturyLink Communications, LLC	US	—	—
63.229.104.32/27	32	21.9%	CenturyLink Communications, LLC	US	Arizona	Surprise
63.229.104.160/27	32	21.9%	CenturyLink Communications, LLC	US	—	—
63.231.211.224/27	32	100.0%	CenturyLink Communications, LLC	US	Florida	Naples
65.100.13.128/27	32	96.9%	CenturyLink Communications, LLC	DE	Hesse	Frankfurt am Main
65.120.27.192/27	32	3.1%	CenturyLink Communications, LLC	US	—	—
65.120.28.224/27	32	15.6%	CenturyLink Communications, LLC	DE	—	—
65.148.33.0/27	32	3.1%	CenturyLink Communications, LLC	DE	—	—
65.148.33.32/27	32	3.1%	CenturyLink Communications, LLC	GB	—	—
65.154.234.0/27	32	0.0%	CenturyLink Communications, LLC	US	Nevada	Henderson
65.154.234.224/27	32	0.0%	CenturyLink Communications, LLC	US	—	—
65.158.30.96/27	32	6.3%	CenturyLink Communications, LLC	US	—	—
185.42.155.32/27	32	6.3%	CenturyLink Communications, LLC	GB	—	—
205.168.23.96/27	32	34.4%	CenturyLink Communications, LLC	US	Colorado	Wheat Ridge
205.168.23.224/27	32	34.4%	CenturyLink Communications, LLC	US	Colorado	Wheat Ridge
63.147.85.0/28	16	6.3%	CenturyLink Communications, LLC	US	—	—
63.159.181.80/28	16	6.3%	CenturyLink Communications, LLC	GB	—	—
63.159.181.160/28	16	6.3%	CenturyLink Communications, LLC	GB	—	—
63.159.181.224/28	16	6.3%	CenturyLink Communications, LLC	US	—	—
63.225.65.32/28	16	18.8%	CenturyLink Communications, LLC	US	—	—
63.228.185.32/28	16	100.0%	CenturyLink Communications, LLC	US	—	—
63.228.185.80/28	16	100.0%	CenturyLink Communications, LLC	US	—	—
63.228.185.208/28	16	100.0%	CenturyLink Communications, LLC	US	Idaho	Meridian
63.229.104.0/28	16	18.8%	CenturyLink Communications, LLC	US	Arizona	Surprise
63.229.104.144/28	16	18.8%	CenturyLink Communications, LLC	US	—	—
63.231.211.128/28	16	100.0%	CenturyLink Communications, LLC	US	—	—
63.231.211.176/28	16	100.0%	CenturyLink Communications, LLC	US	—	—
63.231.211.192/28	16	100.0%	CenturyLink Communications, LLC	PL	—	—

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
63.231.211.0/24	11,122	2026-11-14 05:39:54
63.159.181.0/24	11,062	2026-11-14 05:39:54
67.148.48.0/24	10,757	2026-11-14 05:40:00
67.148.66.0/24	10,744	2026-11-14 05:39:54
63.225.65.0/24	10,690	2026-11-14 05:39:54
63.147.85.0/24	10,659	2026-11-14 05:39:54
67.148.49.0/24	10,647	2026-11-14 05:39:54
67.148.251.0/24	10,644	2026-11-14 05:40:00
46.182.56.0/21	10,634	2026-11-14 05:39:54
65.158.30.0/24	10,634	2026-11-14 05:39:54
65.152.197.0/24	10,631	2026-11-14 05:39:54
65.148.33.0/24	10,630	2026-11-14 05:40:00
63.229.104.0/24	10,629	2026-11-14 05:39:54
65.154.234.0/24	10,612	2026-11-14 05:40:00
65.120.24.0/21	10,611	2026-11-14 05:39:54
63.230.240.0/24	10,611	2026-11-14 05:39:54
63.228.185.0/24	10,603	2026-11-14 05:39:54
65.100.13.0/24	10,543	2026-11-14 05:39:59
185.42.152.0/22	10,387	2026-11-14 05:39:54
204.98.208.0/20	10,386	2026-11-14 07:16:36
205.168.23.0/24	10,353	2026-11-14 05:39:54
97.107.230.0/24	7,698	2026-11-14 02:59:25

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 States.

Who operates AS3910?

AS3910 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 AS3910 registered in?

AS3910 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.

Last updated: 2026-11-14 07:24:05 UTC