HomeASN LookupAS20001

AS20001 TWC-20001-PACWEST - Charter Communications Inc

🇺🇸
ARINassigned
Announced Prefixes (BGP)
680total
644 IPv436 IPv6
IPv4 Addresses
Allocated (RIR)3.8M
Announced (BGP)8.3M
IPv6 Addresses
Allocated (RIR)1.5×10²⁹
Announced (BGP)1.9×10³⁰
Prefix Limit (IPv4)
5,000
Prefix Limit (IPv6)
200
Country
🇺🇸 US
RIR
ARIN
Status
assigned
Allocated
2001-03-13

Routing hygiene

Score 27/100 · Medium risk
RPKI ROA coverage
85.1%
16 prefixes RPKI invalid
IRR route objects
88.5%
60 prefixes registered for another origin
Hijack signals
2
0 announced against others' ROAs, 2 own announced by others
Upstreams
5
diversity 14/100
  • 48 prefixes registered in IRR route objects for another active network and not authorized by a ROA
  • Routes concentrated on one upstream (93% of routes)
  • 15% of announced prefixes (101 of 680) have no valid ROA, 16 of them RPKI invalid

Based on 680 announced prefixes, updated daily (2026-10-23). How the score works · RPKI explained

Announced Prefixes

(BGP)680
|
Prefix
RPKI
IRR
Last Seen
23.94.90.0/24
 Valid
ARINOther IRR
-
23.94.106.0/24
 Valid
ARINOther IRR
-
23.94.109.0/24
 Valid
ARINOther IRR
-
23.94.135.0/24
 Valid
ARINOther IRR
-
23.142.228.0/24
No ROA
Other IRR
-
23.240.0.0/14
 Valid
Other IRR
-
24.24.128.0/17
 Valid
Other IRR
-
24.25.192.0/19
 Valid
Other IRR
-
24.25.224.0/19
 Valid
Other IRR
-
24.30.128.0/18
 Valid
Other IRR
-
1-10 of 680
1 / 68

Allocated Prefixes

(RIR)65
Prefix
Country
RIR
Status
23.240.0.0/14🇺🇸 USARINallocated
24.43.0.0/16🇺🇸 USARINallocated
24.199.0.0/18🇺🇸 USARINallocated
45.48.0.0/14🇺🇸 USARINallocated
45.59.192.0/18🇺🇸 USARINallocated
45.148.135.0/24🇭🇰 HKRIPEassigned
50.113.0.0/16🇺🇸 USARINallocated
66.8.128.0/17🇺🇸 USARINallocated
66.27.0.0/16🇺🇸 USARINallocated
66.74.0.0/15🇺🇸 USARINallocated
1-10 of 65
1 / 7

All 680 announced prefixes of AS20001 →

Downstream Customers(1)

ASNName
AS14460🇺🇸HORIZON - Horizon Media, Inc.

BGP Neighbours

(seen in AS paths)

Upstreams (5)

Networks AS20001 hands its own prefixes to: transit providers, or peers at an exchange.

  • AS7843Charter Communications633
  • AS6939Hurricane Electric18
  • AS701Verizon Business15
  • AS20115Charter Communications12
  • AS19035Hawaii Internet Exchange6

Downstreams (100 of 131)

Networks whose own prefixes AS20001 passes on: usually its customers.

  • AS4179City Of Los Angeles19
  • AS36315Servpac16
  • AS19115Charter Communications9
  • AS11188LOS ANGELES COUNTY INTERNAL SERVICESDIVISION7
  • AS5033Key Information Systems6
  • AS3456Charter Communications5
  • AS46838Port Of Long Beach5
  • AS23000Wescom Credit Union4
  • AS32358County Of Ventura4
  • AS53527Los Angeles Sheriff'S Department4
  • AS54159Xetra Networks4
  • AS54576RESTORE ASN 54576 FOR HOAG MEMORIAL HOSPITAL Hoag Memorial Hospital Presbyterian4
  • AS399269City Of Torrance4
  • AS19739County Of San Bernardino3
  • AS20419DMR Communications3
  • AS21705Houdini3
  • AS25671Wholesale Air Time3
  • AS33614City Of San Diego3
  • AS46292Mojavewifi.Com3
  • AS62819Cetra Group3
  • AS394762Desert Sands Unified School District3
  • AS398071Automobile Club Of Southern California3
  • AS6534Charter Communications2
  • AS14911Taylor Made Golf Company2
  • AS16728Mattel2
  • AS19768SCAN Health Plan2
  • AS19913W PNP2
  • AS22948Walnut Valley Unified School District2
  • AS26302Soboba Casino2
  • AS27468Goodwill Industries Of Orange County2
  • AS30012Universal Music Group2
  • AS33015Los Angeles Superior Court Of California2
  • AS33134Kingston Technology Company2
  • AS36074Torrance Memorial Medical Center2
  • AS46233Eisenhower Medical Center2
  • AS54153Los Angeles County Metropolitan Transportation Authority2
  • AS54690California Lutheran University2
  • AS55113University Of Redlands2
  • AS64290Server ISP2
  • AS393971Martin Luther King Jr., Healthcare Corporation2
  • AS394733Los Angeles LGBT Center2
  • AS395102Yuma Regional Medical Center2
  • AS395560The Culver Studios2
  • AS398023Pomona Valley Hospital Medical Center2
  • AS398929Loma Linda Connected Community Program2
  • AS399685Herring Networks2
  • AS401504City Of Long Beach2
  • AS5641UNIVERSAL HEALTH SERVICES1
  • AS5655Decade Communications1
  • AS7024PixelGate1
  • AS8188Bloomberg Financial Markets Limited Partnership1
  • AS11687City Of Hope Medical Center1
  • AS12017UNIVERSAL HEALTH SERVICES1
  • AS13150CATON CATO NETWORKS1
  • AS13379Disney Worldwide Services1
  • AS13426Juno Online Services1
  • AS14460Horizon Media1
  • AS14767'Iolani School1
  • AS15007Buddhist Tzu Chi Foundation1
  • AS15074Viewsonic Corporation1
  • AS15182ALE USA1
  • AS16386Progressive Produce Corporation1
  • AS16408Los Nettos1
  • AS16565First Hawaiian Bank1
  • AS16774Mercury Insurance Group1
  • AS17044THE INTERPUBLIC GROUP OF COMPANIES1
  • AS17101PORT OF LOS ANGELES1
  • AS18720Pacific Sunwear Of California1
  • AS19776Mid Pacific Institute1
  • AS20201Caryco Tech1
  • AS20429Guitar Center1
  • AS21938YAMAHA MOTOR CORPORATION, U.S.A1
  • AS22293InfoSpace Holdings1
  • AS22358Verdugo Fire Communications Center1
  • AS23154Sanmina SCI Corporation1
  • AS23425-1
  • AS25910City Of Oxnard1
  • AS26005Callaway Golf1
  • AS27242AMERICANTOURS INTERNATIONAL1
  • AS27314Hope International University1
  • AS30251Falken Tire Corporation1
  • AS30546INFINEON TECHNOLOGIES AMERICAS Infineon Technologies Americas1
  • AS30679California State Polytechnic University Pomona1
  • AS32172@Radicalmedia1
  • AS32324CITY OF CERRITOS1
  • AS32326Idemia Civil Identity NA1
  • AS32461ARE East River Science Park1
  • AS33753West Bend Mutual Insurance Company1
  • AS39950STARCREST PRODUCTS OF CALIFORNIA1
  • AS40170Intermetro Communications1
  • AS40280Christie Digital Systems Canada1
  • AS40466Fiserv Solutions1
  • AS40743California Joint Powers Insurance Authority1
  • AS46744City And County Of Honolulu1
  • AS47065USC / UFMG PEERING Research Testbed1
  • AS53249Los Angeles World Airport1
  • AS54201We Link Networks1
  • AS54575SUKUT CONSTRUCTION1
  • AS54645HANMI BANK1
  • AS55253Creative Artists Agency1

Transfer History

Registry transfers of AS20001 between organisations.

1
ASPA
No ASPA0 upstreams, 1 downstream
Listed as Upstream Provider by
1 ASN
View full ASPA details →
External Links
ARIN WhoisRIPEstat

Learn more

API
Open
GEThttps://api.ipctl.io/v1/asn/20001

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

curl -s "https://api.ipctl.io/v1/asn/20001" | jq