HomeASN LookupAS209

AS209 CENTURYLINK-US-LEGACY-QWEST - CenturyLink Communications, LLC

🇺🇸
ARINassigned
Announced Prefixes (BGP)
1,658total
1,626 IPv432 IPv6
IPv4 Addresses
Allocated (RIR)17.7M
Announced (BGP)26.2M
IPv6 Addresses
Allocated (RIR)2×10³¹
Announced (BGP)2×10³¹
Prefix Limit (IPv4)
20,000
Prefix Limit (IPv6)
100
Country
🇺🇸 US
RIR
ARIN
Status
assigned
Allocated
1998-11-13

Routing hygiene

Score 60/100 · High risk
RPKI ROA coverage
1.3%
no RPKI invalid prefixes
IRR route objects
0.4%
77 prefixes registered for another origin
Hijack signals
0
0 announced against others' ROAs, 0 own announced by others
Upstreams
1
diversity 0/100
  • 99% of announced prefixes (1636 of 1658) have no valid ROA
  • 100% of announced prefixes (1651 of 1658) have no IRR route object for this ASN
  • Only one upstream seen in the AS paths of its routes
  • 43 prefixes registered in IRR route objects for another active network and not authorized by a ROA

Based on 1,658 announced prefixes, updated daily (2026-10-25). How the score works · RPKI explained

Announced Prefixes

(BGP)1,000 of 1,658
|
Prefix
RPKI
IRR
Last Seen
8.15.5.0/24
No ROA--
24.223.60.0/24
No ROA--
24.223.74.0/23
No ROA--
52.119.16.0/20
No ROA--
52.119.26.0/24
No ROA--
52.119.28.0/24
No ROA--
63.144.0.0/12
No ROA--
63.152.0.0/16
No ROA--
63.153.0.0/18
No ROA--
63.153.128.0/17
No ROA--
1-10 of 1,000
1 / 100

Allocated Prefixes

(RIR)133
Prefix
Country
RIR
Status
64.40.64.0/19🇺🇸 USARINallocated
64.45.192.0/18🇺🇸 USARINallocated
64.89.96.0/19🇺🇸 USARINallocated
64.91.0.0/17🇺🇸 USARINallocated
64.92.160.0/20🇺🇸 USARINallocated
64.238.224.0/19🇺🇸 USARINallocated
65.40.0.0/15🇺🇸 USARINallocated
65.100.0.0/14🇺🇸 USARINallocated
65.112.0.0/12🇺🇸 USARINallocated
65.128.0.0/11🇺🇸 USARINallocated
1-10 of 133
1 / 14

All 1,658 announced prefixes of AS209 →

Downstream Customers(6)

ASNName
AS1436🇺🇸HACKENSACK-MERIDIAN-HEALTH - Meridian Health System
AS20012🇺🇸CHILLER-CITY - Interworks Networking Services
AS396908🇺🇸LAURENS-TECHNOLOGIES-INTERNET-SERVICES - Laurens Technologies Internet Services
AS398837🇺🇸HOPE - Hope Enterprise Corporation
AS399187🇺🇸COB-MN-US - City of Bloomington
AS402260🇺🇸DR-ASN01 - University of Colorado Medicine

BGP Neighbours

(seen in AS paths)

Upstreams (1)

Networks AS209 hands its own prefixes to: transit providers, or peers at an exchange.

  • AS3356Level 3 Parent1,658

Downstreams (100 of 237)

Networks whose own prefixes AS209 passes on: usually its customers.

  • AS22561CenturyLink Communications336
  • AS396908Laurens Technologies Internet Services108
  • AS3561CenturyLink Communications35
  • AS14921CenturyLink Communications34
  • AS297National Aeronautics And Space Administration28
  • AS18530Isomedia26
  • AS17402CenturyLink Communications25
  • AS21904PowerOne24
  • AS54427NetTally22
  • AS11255Screamin' Banshee Technologies12
  • AS16417Cisco Systems Ironport Division11
  • AS32083Omnispring9
  • AS400988Salt Lake County9
  • AS30221T3 Communications8
  • AS54519US Signal Company, L.L.C8
  • AS3389Ford Motor Company7
  • AS3743Cleveland Cliffs Steel7
  • AS13485Grand Canyon University7
  • AS210Utah Education Network6
  • AS3909CenturyLink Communications6
  • AS11857Money Services6
  • AS17385Orbitel Communications6
  • AS19886Bank Of America, National Association6
  • AS22522United Launch Alliance6
  • AS26326US Signal Company, L.L.C6
  • AS40766Equinox Payments6
  • AS4015CenturyLink Communications5
  • AS6223CenturyLink Communications5
  • AS6373Opus One5
  • AS7359CenturyLink Communications5
  • AS12086DT Micro5
  • AS13866Computer Country5
  • AS33350Arizona Public Service Company5
  • AS4297CenturyLink Communications4
  • AS10361Bloomberg, LP4
  • AS13659INTERTECH CORPORATION4
  • AS21660Baxalta Incorporated4
  • AS29842East Tennessee State University4
  • AS62566Starbucks Coffee Company4
  • AS400008Zoot Enterprises4
  • AS3573Accenture LLP3
  • AS4296CenturyLink Communications3
  • AS10966Alaska Airlines3
  • AS12156City Of Aurora Colorado3
  • AS13684Medtronic, Incorporated3
  • AS15307Childrens Hospital And Regional Medical Center3
  • AS16491ViaSat3
  • AS16756ABC Virtual Communications3
  • AS16871McDonagh Bros3
  • AS17242UNIPAC Service Corporation3
  • AS18898Vesta Corporation3
  • AS19149US Signal Company, L.L.C3
  • AS19390JH Compunet3
  • AS19800Grant County Public Utility District3
  • AS22523State Of NM Administrative Office Of The Courts3
  • AS23458Denver Health And Hospital Authority3
  • AS25992Las Vegas Metropolitan Police Department3
  • AS33476SS&C Technologies3
  • AS46453Abbott Laboratories3
  • AS54538PALO ALTO NETWORKS3
  • AS54983FirstService Residential3
  • AS63486HQ USMC NAF Business & Support Services Division (MR)3
  • AS394046JELD WEN3
  • AS394329STATE OF UTAH COURTS3
  • AS1401DSW Information Technology2
  • AS4211Maricopa County Government2
  • AS6224CenturyLink Communications2
  • AS7191CenturyLink Communications2
  • AS7743JPMorgan Chase &2
  • AS10370Northwest Airlines2
  • AS10599McKesson2
  • AS10655BLOOMBERG INDUSTRY GROUP2
  • AS10695Wal Mart Stores2
  • AS11985Social Security Administration2
  • AS12113Dawn Food Products2
  • AS13325Michigan State Government2
  • AS13548College Of Charleston2
  • AS14242City Of Chandler2
  • AS14438U S A CHOICE INTERNET SERVICES2
  • AS15234MCG Energy Solutions2
  • AS16746CenterPoint Energy2
  • AS16809Dollar Bank2
  • AS17094Mutual Of Omaha Insurance Company2
  • AS17150America First Credit Union2
  • AS18500PACCAR INFORMATION TECHNOLOGY DIVISION2
  • AS19904City Of Longview2
  • AS21509Apollo Management, L.P2
  • AS22230NetDocuments2
  • AS23172Pentagon Federal Credit Union2
  • AS23255Pacificorp2
  • AS26848Principal Financial Group2
  • AS26959Cognizant Trizetto Software Group2
  • AS27285Oppenheimer Capital/Quest For Value2
  • AS32153Shorts Travel Management2
  • AS32231Pathward, N.A2
  • AS33222Ashley Furniture Industries2
  • AS33255Hampden Sydney College2
  • AS36467Mainline Information Systems2
  • AS40879Incorporated County Of Los Alamos2
  • AS46133Elite Telecom2

Other adjacent networks (2)

Adjacent to AS209 in the transit part of AS paths: peers, providers or customers.

  • AS3910CenturyLink Communications5
  • AS11996Lobo Internet Services1

Transfer History

Registry transfers of AS209 between organisations.

1
ASPA
No ASPA0 upstreams, 6 downstreams
Listed as Upstream Provider by
6 ASNs
View full ASPA details →
External Links
ARIN WhoisRIPEstat

Learn more

API
Open
GEThttps://api.ipctl.io/v1/asn/209

Returns ASN details, announced prefixes, and BGP routing data.

curl -s "https://api.ipctl.io/v1/asn/209" | jq