ASN Lookup Tool

Level 3 Parent, LLC level3.com US US 149 Routes

AS Data

AS203

AS203Level 3 Parent, LLC

AS Number 203
AS Name CENTURYLINK-LEGACY-LVLT-203
Organization Level 3 Parent, LLC(lpl-141)
Country US
Website level3.com
Number of IPv4 Routes 149
Number of IPv6 Routes 0
ASN type BUSINESS
Registry ARIN
Date Allocated 2002-06-05

ASN Intelligence API for production workflows

Use ASN data for AS203 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

Access complete peers, upstreams, downstreams, routes, WHOIS, and contact intelligence via our API. Learn more

IP Ranges

Route # IPs
128.177.179.0/24 256
63.106.6.0/24 256
66.193.107.0/24 256
63.128.14.0/24 256
4.31.172.128/25 128
143.199.28.0/24 256
161.209.111.0/24 256
209.164.195.0/25 128
199.68.19.0/24 256
209.164.207.0/24 256

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:       203
ASName:         CENTURYLINK-LEGACY-LVLT-203
ASHandle:       AS203
RegDate:        2002-06-05
Updated:        2019-12-04    
Ref:            https://rdap.arin.net/registry/autnum/203



OrgName:        Level 3 Parent, LLC
OrgId:          LPL-141
Address:        100 CenturyLink Drive
City:           Monroe
StateProv:      LA
PostalCode:     71203
Country:        US
RegDate:        2018-02-06
Updated:        2024-06-17
Comment:        USAGE OF IP SPACE MUST COMPLY WITH OUR ACCEPTABLE USE POLICY:
Comment:        https://www.lumen.com/en-us/about/legal/acceptable-use-policy.html
Comment:        
Comment:        ADDRESSES COVERED BY THIS ORG-ID ARE NON-PORTABLE ANY ISP ANNOUNCING OR TRANSITING PORTIONS WITHIN OUR RANGES SHOULD NOT RELY ON PRESENTED LOA'S OR OLD WHOIS UNLESS THOSE RANGES ARE ALSO ACTIVELY DIRECTLY ANNOUNCED TO A LUMEN ASN. WITH ALL LOA'S THESE CONDITIONS APPLY:
Comment:        
Comment:        1. You are permitted to route the Lumen IP prefixes listed via Public BGP to your alternate ISP from the designated ASN. Any other ASN originating the prefix listed is forbidden.
Comment:        2. The Lumen IP prefixes listed can be routed via Public BGP to your alternate ISP as long as you remain an active customer with Lumen and continue to route the prefixes over at least one Lumen Internet circuit without significant traffic engineering.
Comment:        3. Should your Internet services with Lumen be discontinued, Lumen reserves the right to have your alternate ISP terminate the routing of the Lumen IP prefixes without advanced notification, should you fail to do so.
Comment:        4. All IP Addresses assigned or allocated by Lumen to an end-user (customer or ISP) shall be considered non-portable and will be reclaimed by Lumen upon service termination.
Comment:        5. Lumen reserves the right to conduct audits to ensure the LOA conditions are being met.
Comment:        6. Usage of IP space must comply with our AUP https://www.lumen.com/en-us/about/legal/acceptable-use-policy.html
Comment:        
Comment:        Our looking glass is located at: https://lookingglass.centurylink.com/
Comment:        
Comment:        For subpoena or court order please fax 844.254.5800 or refer to our Trust & Safety page:
Comment:        https://www.lumen.com/en-us/about/legal/trust-center/trust-and-safety.html
Comment:        
Comment:        For abuse issues, please email abuse@aup.lumen.com
Comment:        All abuse reports MUST include:
Comment:        * src IP
Comment:        * dest IP (your IP)
Comment:        * dest port
Comment:        * Accurate date/timestamp and timezone of activity
Comment:        * Intensity/frequency (short log extracts)
Comment:        * Your contact details (phone and email)
Comment:        Without these we will be unable to identify the correct owner of the IP address at that point in time.
Ref:            https://rdap.arin.net/registry/entity/LPL-141


OrgAbuseHandle: LAC56-ARIN
OrgAbuseName:   L3 Abuse Contact
OrgAbusePhone:  +1-877-453-8353 
OrgAbuseEmail:  abuse@level3.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/LAC56-ARIN

OrgTechHandle: APL7-ARIN
OrgTechName:   ADMIN POC LVLT
OrgTechPhone:  +1-877-453-8353 
OrgTechEmail:  ipadmin@lumen.com
OrgTechRef:    https://rdap.arin.net/registry/entity/APL7-ARIN

OrgRoutingHandle: RPKIR-ARIN
OrgRoutingName:   RPKI-ROA
OrgRoutingPhone:  +1-877-886-6515 
OrgRoutingEmail:  rpki-roa@lumen.com
OrgRoutingRef:    https://rdap.arin.net/registry/entity/RPKIR-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
AS10753 Level 3 Parent, LLC US
AS3356 Level 3 Parent, LLC US

Upstreams

AS Number Description Country
AS3356 Level 3 Parent, LLC US

Downstreams

AS Number Description Country
AS10753 Level 3 Parent, LLC US

Contacts

Legacy Routes

Ready to get started?Get Started with IP Intelligence API Today

CTA Illustration

Frequently Asked Questions

ASN AS203 is an Autonomous System Number used to identify a network for BGP internet routing.
AS203 is listed under Level 3 Parent, 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.