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AS203 Level 3 Parent, LLC

CENTURYLINK-LEGACY-LVLT-203 - Level 3 Parent, LLC · registered in the United States

IPv4 addresses230,912106 prefixes · 0.007% of announced IPv4
Rank in United States#290largest network in US by IPv4 space, of 18,338 · 0.02% of US
Rank worldwide#975of 79,396 networks with IPv4
IPv6noneno IPv6 routes announced
CountryUnited States18,679 ASNs registered there
Open AS203 in ASN lookup Look up an IP in this network (8.7.155.1) All networks in United States

IPv4 prefixes

All 106 prefixes, in address order.

  • 8.7.155.0/24
  • 8.15.229.0/24
  • 8.18.63.0/24
  • 8.20.69.0/24
  • 8.25.26.0/24
  • 8.44.205.0/24
  • 38.107.240.0/24
  • 62.67.222.0/24
  • 63.106.6.0/24
  • 63.128.0.0/23
  • 63.128.2.0/23
  • 63.128.7.0/24
  • 63.128.8.0/22
  • 63.128.12.0/24
  • 63.128.14.0/24
  • 63.128.20.0/24
  • 63.128.24.0/24
  • 63.144.218.0/24
  • 63.150.74.0/23
  • 63.175.205.0/24
  • 63.233.90.0/24
  • 64.22.148.0/24
  • 64.208.127.0/24
  • 64.209.141.0/24
  • 64.210.246.0/24
  • 64.241.120.0/23
  • 65.240.184.0/23
  • 66.193.107.0/24
  • 128.177.179.0/24
  • 143.112.0.0/18
  • 143.112.64.0/21
  • 143.112.72.0/21
  • 143.112.80.0/20
  • 143.112.96.0/19
  • 143.112.128.0/22
  • 143.112.132.0/22
  • 143.112.136.0/21
  • 143.112.144.0/22
  • 143.112.148.0/22
  • 143.112.152.0/21
  • 143.112.160.0/19
  • 143.112.192.0/19
  • 143.112.224.0/20
  • 143.112.240.0/21
  • 143.112.248.0/22
  • 143.112.252.0/23
  • 143.112.254.0/24
  • 143.199.28.0/24
  • 143.199.96.0/24
  • 143.199.109.0/24
  • 143.199.135.0/24
  • 143.199.140.0/23
  • 143.199.222.0/24
  • 148.59.168.0/24
  • 149.21.0.0/16
  • 156.42.32.0/19
  • 156.42.64.0/18
  • 156.42.128.0/18
  • 156.42.208.0/21
  • 156.42.224.0/19
  • 158.120.127.0/24
  • 161.209.96.0/21
  • 161.209.104.0/21
  • 161.209.192.0/19
  • 161.209.225.0/24
  • 170.22.90.0/24
  • 185.151.67.0/24
  • 189.125.51.0/24
  • 192.26.214.0/24
  • 192.42.110.0/24
  • 192.147.2.0/24
  • 198.200.148.0/24
  • 204.153.154.0/23
  • 205.139.102.0/23
  • 205.139.104.0/22
  • 205.139.108.0/24
  • 206.79.6.0/24
  • 206.169.67.0/24
  • 206.203.64.0/24
  • 206.203.66.0/24
  • 206.203.68.0/22
  • 206.203.72.0/24
  • 206.203.75.0/24
  • 206.203.76.0/23
  • 206.203.79.0/24
  • 206.203.82.0/23
  • 206.203.84.0/22
  • 206.203.94.0/23
  • 206.203.96.0/20
  • 206.203.112.0/21
  • 206.203.120.0/23
  • 206.203.122.0/24
  • 206.203.124.0/22
  • 206.227.205.0/24
  • 206.227.206.0/24
  • 206.227.208.0/24
  • 206.227.211.0/24
  • 206.227.216.0/23
  • 206.227.226.0/23
  • 206.227.229.0/24
  • 209.67.132.0/22
  • 209.67.136.0/22
  • 216.32.151.0/24
  • 216.33.160.0/24
  • 216.114.73.0/24
  • 216.235.200.0/21

Other ASNs named Level 3 Parent, LLC

8 other networks use the same organisation name; together with AS203 they announce 32,815,616 IPv4 addresses.

ASNNameIPv4 addresses
AS3356LEVEL3 - Level 3 Parent, LLC US27,412,864
AS3549LVLT-3549 - Level 3 Parent, LLC US4,521,728
AS10753LUMEN-LEGACY-L3-CUSTOMER-SHARED-USE - Level 3 Parent, LLC US640,512
AS1LVLT-1 - Level 3 Parent, LLC US7,296
AS202CENTURYLINK-LEGACY-LVLT-202 - Level 3 Parent, LLC US1,024
AS596CENTURYLINK-LEGACY-LVLT-596 - Level 3 Parent, LLC US512
AS18756PATEAM - Level 3 Parent, LLC US512
AS19094RESERVED-IPADMIN - Level 3 Parent, LLC US256

Similar-sized networks in United States

ASNNameIPv4 addresses
AS11272#287 TELEPAK-NETWORKS-INC - C Spire Fiber231,424
AS32982#288 DOE-HQ - U.S. Department of Energy230,912
AS1998#289 STATE-OF-MN - State of Minnesota230,912
AS6527#291 MASSACHUSETTS - Commonwealth of Massachusetts230,400
AS10405#292 UPRR-ASN-01 - Union Pacific Railroad Company229,376
AS395139#293 NYP-INTERNET - NewYork-Presbyterian Hospital229,376

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources