ASN Lookup Tool

CSC Holdings, LLC optimum.com US US 3118 Routes

AS Data

AS19108

AS19108 – CSC Holdings, LLC

AS Number 19108
AS Name SUDDENLINK-COMMUNICATIONS
Organization CSC Holdings, LLC (sudde)
Country US
Website optimum.com
Number of IPv4 Routes 408
Number of IPv6 Routes 26
ASN type ISP
Registry ARIN
Date Allocated 2000-11-20

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Use ASN data for AS19108 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route # IPs
173.218.0.0/16 65536
24.32.214.0/24 256
47.211.72.0/22 1024
47.217.92.0/22 1024
75.109.169.0/24 256
75.109.104.0/22 1024
74.194.126.0/23 512
173.80.192.0/22 1024
24.32.16.0/21 2048
47.221.88.0/22 1024
208.180.216.0/24 256
24.32.154.0/23 512
173.216.252.0/24 256
24.121.164.0/23 512
173.219.32.0/24 256
72.47.138.0/24 256
24.121.182.0/23 512
50.24.88.0/22 1024
74.192.168.0/24 256
173.80.236.0/22 1024
47.215.64.0/22 1024
75.108.12.0/22 1024
74.192.167.0/24 256
208.180.187.0/24 256
75.108.80.0/21 2048
74.195.65.0/24 256
47.215.244.0/22 1024
75.108.46.0/23 512
173.216.0.0/22 1024
75.109.168.0/24 256
75.111.28.0/22 1024
24.32.184.0/24 256
47.221.228.0/22 1024
75.111.176.0/22 1024
205.201.107.0/24 256
47.222.108.0/22 1024
24.206.213.0/24 256
47.214.16.0/22 1024
47.214.0.0/16 65536
64.72.63.0/24 256
173.216.251.0/24 256
47.220.212.0/22 1024
75.111.92.0/22 1024
74.196.180.0/23 512
47.222.172.0/22 1024
47.223.188.0/22 1024
24.32.118.0/24 256
2600:5400:7000::/36 ~5×10²⁷
24.206.212.0/24 256
173.218.28.0/22 1024
173.81.36.0/22 1024
75.110.126.0/23 512
47.212.0.0/22 1024
173.216.254.0/24 256
75.110.44.0/22 1024
47.222.68.0/22 1024
74.195.64.0/24 256
47.220.116.0/22 1024
74.194.222.0/23 512
207.254.245.0/24 256

Raw Whois Response

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#


ASNumber:       19108
ASName:         SUDDENLINK-COMMUNICATIONS
ASHandle:       AS19108
RegDate:        2000-11-20
Updated:        2012-03-20
Ref:            https://rdap.arin.net/registry/autnum/19108


OrgName:        Optimum
OrgId:          SUDDE
Address:        311 NNW Loop 323
City:           Tyler
StateProv:      TX
PostalCode:     75701
Country:        US
RegDate:        2006-05-25
Updated:        2025-08-06
Ref:            https://rdap.arin.net/registry/entity/SUDDE


OrgNOCHandle: NOCSU37-ARIN
OrgNOCName:   NOC Suddenlink
OrgNOCPhone:  +1-866-232-5455 
OrgNOCEmail:  hostmaster@cv.net
OrgNOCRef:    https://rdap.arin.net/registry/entity/NOCSU37-ARIN

OrgAbuseHandle: ABUSE6997-ARIN
OrgAbuseName:   Abuse Suddenlink
OrgAbusePhone:  +1-903-266-4800 
OrgAbuseEmail:  abuse@suddenlink.net
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ABUSE6997-ARIN

OrgTechHandle: AUIO-ARIN
OrgTechName:   Altice USA Internet Operations
OrgTechPhone:  +1-516-803-2300 
OrgTechEmail:  hostmaster@cv.net
OrgTechRef:    https://rdap.arin.net/registry/entity/AUIO-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#

Parsed Whois Response

Peers

AS Number Description Country
AS20115 Charter Communications LLC US
AS393737 Cpuonsite US
AS26289 Southside Bancshares, Inc. US
AS402331 UNIVERSAL HEALTH SERVICES US
AS32500 Airbus DS Communications Inc US
AS40600 Stride Bank, National Association US
AS63023 GTHost US
AS14907 Wikimedia Foundation Inc. US
AS58511 Anycast Holdings Pty Ltd AU
AS40420 Silverline Solutions INC. US
AS3303 Swisscom Schweiz AG CH
AS18981 SUPERNet II US
AS16509 Amazon.com, Inc. US
AS714 Apple Inc. US
AS23367 Adaptive Data Networks, LLC US
AS5650 Verizon Business US
AS26867 Brookshire Grocery Company US
AS36692 Cisco OpenDNS, LLC US
AS62560 Hosted America US
AS32590 Valve Corporation US
AS395866 Fort Mojave Television, Inc. US
AS46792 Paragould Municipal Utilities US
AS6507 Riot Games, Inc US
AS32458 IND. CO. CABLE TV, INC. US
AS18824 Plains Cotton Cooperative Association US
AS1031 PEER 1031 LLC US
AS399388 DCTexas Internet US
AS29838 Atlantic Metro Communications II, Inc. US
AS1299 Arelion Sweden AB SE
AS395183 ETEC US
AS32787 Akamai Technologies, Inc. US
AS46169 City of Georgetown US
AS15305 Syringa Networks, LLC US
AS400947 Shannon Medical Center US
AS7843 Charter Communications Inc US
AS400948 Midland County Hospital District US
AS394072 Abilene Independent School District US
AS400102 Apogee Telecom Inc. US
AS22616 ZSCALER, INC. US
AS397861 BROADWAVES COMMUNICATIONS US
AS398474 City of College Station US
AS397354 Wi Fiber, Inc. US
AS2635 Automattic, Inc US
AS19151 BroadbandONE, LLC US
AS400004 SecureNet US
AS14623 Lubbock Christian University US
AS42 WoodyNet, Inc. US
AS2381 WiscNet US
AS6327 Shaw Communications CA
AS32098 Transtelco Inc US
AS26920 DataGroup Technologies, LLC US
AS396028 Vidant Health US
AS45102 Alibaba US Technology Co., Ltd. US
AS3356 Level 3 Parent, LLC US
AS46925 PAVLOV MEDIA INC US
AS49544 i3D.net B.V NL
AS4826 VOCUS PTY LTD AU
AS22752 MRC Global US Inc. US
AS47041 ST BERNARDS HEALTHCARE US
AS6939 Hurricane Electric LLC US

Upstreams

AS Number Description Country
AS60068 Datacamp Limited GB
AS41095 IPTP LTD GB
AS5650 Verizon Business US
AS6327 Shaw Communications CA
AS8220 COLT Technology Services Group Limited GB
AS29838 Atlantic Metro Communications II, Inc. US
AS3303 Swisscom Schweiz AG CH
AS1299 Arelion Sweden AB SE
AS6939 Hurricane Electric LLC US
AS3356 Level 3 Parent, LLC US
AS174 Cogent Communications, LLC US

Downstreams

AS Number Description Country
AS22752 MRC Global US Inc. US
AS393737 Cpuonsite US
AS26289 Southside Bancshares, Inc. US
AS47041 ST BERNARDS HEALTHCARE US
AS402331 UNIVERSAL HEALTH SERVICES US
AS46523 Kinetix Broadband, LLC US
AS32500 Airbus DS Communications Inc US
AS40600 Stride Bank, National Association US
AS26793 ICS Advanced Technologies US
AS401873 UNIVERSAL HEALTH SERVICES US

Contacts

Email Contacts

hostmaster@cv.net

Abuse Contacts

abuse@suddenlink.net

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Frequently Asked Questions

ASN AS19108 is an Autonomous System Number used to identify a network for BGP internet routing.
AS19108 is listed under CSC Holdings, LLC.
Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.
Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.
WHOIS provides registration and contact context for ASN ownership, administration, and operational reference.
This page previews large ASN datasets. Use See more to load additional rows, and upgrade your plan to view complete peer, route, upstream, and downstream data.