$ query “AS3356” --type=asn → 1 result(s)

AS3356 · LEVEL3

Level 3 Parent LLC

AS3356 is run by Level 3 Parent LLC and is a Tier-1 transit provider, registered in the United States since 2000. The system announces a whopping 29.5 million IPv4 addresses (0.80% of routable IPv4 space), including a /9, and supports IPv6. The bulk of its IP address space is in the United States, with additional presence in the United Kingdom and Germany, and smaller footprints in 60 additional countries. This AS's prefix announcements have been recently modified.

  • Top 5% — Top 5% of all autonomous systems by reach and degree
  • Space Overlord — Over 10 million IPv4 addresses
  • #1 by Reach — Top 100 by customer cone size
  • #4 by Degree — Top 100 by unique BGP neighbor count
  • #1 in United States — Top 10 by reach within country

Basic Information

Country
🇺🇸 United States
Category
Internet Service Provider
Network Role
Tier-1 Transit
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Registered
March 10, 2000
Last Changed
March 04, 2026
Last Seen
April 18, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
1 190 / 812
IPv6 Prefixes (raw / aggregated)
140 / 48
IPv4 Addresses
29 470 720
Largest IPv4 Prefix
/9 (8 388 608 addresses)
Largest IPv6 Prefix
/29
Geolocated Countries
🇺🇸 United States (36 965 920 IPs), 🇬🇧 United Kingdom (692 768 IPs), 🇩🇪 Germany (158 832 IPs) and 60 more
Prefix Changed
April 18, 2026

Reputation

Reputation
Good — 188 flagged IPs out of 29 470 720 total (0.00%)
Open Proxies
2 known open proxies in this network

Connectivity Summary

Peers
72 networks exchanging traffic without transit
Downstream Customers
6 481 downstreams buying transit
Unclassified
188 unclassified BGP neighbors
Degree
6 741 unique BGP neighbors
Reach
71 917 networks in customer cone

Prefix Lists

IPv4 Prefixes (1 190 total)

  • 8.0.0.0/9 (8 388 608 addresses (/9 prefix))
  • 4.0.0.0/9 (8 388 608 addresses (/9 prefix))
  • 8.224.0.0/11 (2 097 152 addresses (/11 prefix))
  • 8.192.0.0/12 (1 048 576 addresses (/12 prefix))
  • 63.208.0.0/13 (524 288 addresses (/13 prefix))
  • 64.152.0.0/13 (524 288 addresses (/13 prefix))
  • 204.160.0.0/13 (524 288 addresses (/13 prefix))
  • 67.24.0.0/13 (524 288 addresses (/13 prefix))
  • 205.128.0.0/14 (262 144 addresses (/14 prefix))
  • 64.192.0.0/14 (262 144 addresses (/14 prefix))
  • 199.92.0.0/14 (262 144 addresses (/14 prefix))
  • 65.88.0.0/14 (262 144 addresses (/14 prefix))
  • 209.244.0.0/14 (262 144 addresses (/14 prefix))
  • 206.240.0.0/14 (262 144 addresses (/14 prefix))
  • 65.56.0.0/14 (262 144 addresses (/14 prefix))
  • 205.180.0.0/14 (262 144 addresses (/14 prefix))
  • 216.140.0.0/14 (262 144 addresses (/14 prefix))
  • 207.120.0.0/14 (262 144 addresses (/14 prefix))
  • 67.96.0.0/14 (262 144 addresses (/14 prefix))
  • 206.32.0.0/14 (262 144 addresses (/14 prefix))
  • 198.112.0.0/14 (262 144 addresses (/14 prefix))
  • 198.92.0.0/14 (262 144 addresses (/14 prefix))
  • 198.76.0.0/14 (262 144 addresses (/14 prefix))
  • 67.72.0.0/14 (262 144 addresses (/14 prefix))
  • 205.224.0.0/14 (262 144 addresses (/14 prefix))
  • 72.236.0.0/15 (131 072 addresses (/15 prefix))
  • 199.76.0.0/15 (131 072 addresses (/15 prefix))
  • 69.44.0.0/15 (131 072 addresses (/15 prefix))
  • 204.198.0.0/15 (131 072 addresses (/15 prefix))
  • 192.216.0.0/16 (65 536 addresses (/16 prefix))
  • 131.119.0.0/16 (65 536 addresses (/16 prefix))
  • 209.0.0.0/16 (65 536 addresses (/16 prefix))
  • 65.77.0.0/16 (65 536 addresses (/16 prefix))
  • 166.90.0.0/16 (65 536 addresses (/16 prefix))
  • 199.78.0.0/16 (65 536 addresses (/16 prefix))
  • 207.227.0.0/16 (65 536 addresses (/16 prefix))
  • 156.139.0.0/16 (65 536 addresses (/16 prefix))
  • 216.202.0.0/16 (65 536 addresses (/16 prefix))
  • 192.239.0.0/16 (65 536 addresses (/16 prefix))
  • 171.75.0.0/16 (65 536 addresses (/16 prefix))
  • 207.83.0.0/16 (65 536 addresses (/16 prefix))
  • 199.75.0.0/16 (65 536 addresses (/16 prefix))
  • 62.67.0.0/16 (65 536 addresses (/16 prefix))
  • 209.84.0.0/16 (65 536 addresses (/16 prefix))
  • 217.163.0.0/16 (65 536 addresses (/16 prefix))
  • 198.31.0.0/16 (65 536 addresses (/16 prefix))
  • 209.241.0.0/16 (65 536 addresses (/16 prefix))
  • 64.200.0.0/16 (65 536 addresses (/16 prefix))
  • 192.233.0.0/16 (65 536 addresses (/16 prefix))
  • 192.221.0.0/16 (65 536 addresses (/16 prefix))
  • and 762 more

IPv6 Prefixes (140 total)

  • 2a10:2780::/29
  • 2001:13b2::/31
  • 2401:f6e0::/32
  • 2a05:8944::/32
  • 2a05:8943::/32
  • 2806:281::/32
  • 2606:840::/32
  • 2001:4c08::/32
  • 2c0f:f7f8::/32
  • 2001:13b4::/32
  • 2001:1900::/32
  • 2620:12c:3000::/44
  • 2602:2f4::/44
  • 2a07:aa00:8::/46
  • 2a07:aa00:90::/46
  • 2a07:aa00:8c::/46
  • 2620:13d:2060::/46
  • 2620:130:800a::/47
  • 2a07:aa00:94::/47
  • 2a07:aa00:86::/47
  • 2a07:aa00:e::/47
  • 2620:b0:4000::/48
  • 2a06:6541:2002::/48
  • 2620:cc:4000::/48
  • 2620:123:d001::/48
  • 2001:13b0:8029::/48
  • 2620:a9:4000::/48
  • 2620:135:7002::/48
  • 2620:9f:12::/48
  • 2620:13d:d01c::/48
  • 2001:13b0:8021::/48
  • 2001:13b0:8013::/48
  • 2001:450:2015::/48
  • 2a06:6540:2002::/48
  • 2001:1b40:3333::/48
  • 2a07:aa00:4::/48
  • 2001:428:3816::/48
  • 2a07:aa00:d::/48
  • 2620:7e:30e0::/48
  • 2a07:aa00:80::/48
  • 2a07:aa00:84::/48
  • 2001:13b0:a031::/48
  • 2606:640::/48
  • 2001:13b0:b900::/48
  • 2001:13b0:c000::/48
  • 2a07:aa00:96::/48
  • 2001:428:6400::/48
  • 2001:428:5805::/48