$ query “AS20001” --type=asn → 1 result(s)

AS20001 · TWC-20001-PACWEST

Charter Communications Inc

AS20001 belongs to Charter Communications Inc and is a major transit provider, registered in the United States since 2001. The system announces an impressive 7.2 million IPv4 addresses, including a /13, and supports IPv6. Most of its address space is geolocated to the United States, with additional presence in Australia and Canada, and smaller footprints in 3 additional countries. This AS has recently updated its prefix announcements.

  • Top 5% — Top 5% of all autonomous systems by reach and degree

Basic Information

Country
🇺🇸 United States
Category
Internet Service Provider
Network Role
Major Transit
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Registered
March 13, 2001
Last Changed
March 04, 2026
Last Seen
July 25, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
553 / 404
IPv6 Prefixes (raw / aggregated)
20 / 12
IPv4 Addresses
7 197 184
Largest IPv4 Prefix
/13 (524 288 addresses)
Largest IPv6 Prefix
/28
Geolocated Countries
🇺🇸 United States (10 059 952 IPs), 🇦🇺 Australia (332 336 IPs), 🇨🇦 Canada (1 024 IPs) and 3 more
Prefix Changed
July 21, 2026

Reputation

Reputation
Good — 97 flagged IPs out of 7 197 184 total (0.00%)
Open Proxies
4 known open proxies in this network

Connectivity Summary

Upstream Providers
3 upstreams providing transit
Peers
2 networks exchanging traffic without transit
Downstream Customers
147 downstreams buying transit
Unclassified
5 unclassified BGP neighbors
Degree
157 unique BGP neighbors
Reach
152 networks in customer cone

Upstream Providers (3)

Prefix Lists

IPv4 Prefixes (553 total)

  • 76.168.0.0/13 (524 288 addresses (/13 prefix))
  • 172.112.0.0/13 (524 288 addresses (/13 prefix))
  • 76.80.0.0/14 (262 144 addresses (/14 prefix))
  • 104.32.0.0/14 (262 144 addresses (/14 prefix))
  • 104.172.0.0/14 (262 144 addresses (/14 prefix))
  • 98.148.0.0/14 (262 144 addresses (/14 prefix))
  • 23.240.0.0/14 (262 144 addresses (/14 prefix))
  • 172.88.0.0/14 (262 144 addresses (/14 prefix))
  • 172.248.0.0/14 (262 144 addresses (/14 prefix))
  • 45.48.0.0/14 (262 144 addresses (/14 prefix))
  • 98.152.0.0/14 (262 144 addresses (/14 prefix))
  • 75.84.0.0/15 (131 072 addresses (/15 prefix))
  • 66.74.0.0/15 (131 072 addresses (/15 prefix))
  • 76.166.0.0/15 (131 072 addresses (/15 prefix))
  • 75.82.0.0/15 (131 072 addresses (/15 prefix))
  • 76.94.0.0/15 (131 072 addresses (/15 prefix))
  • 76.32.0.0/15 (131 072 addresses (/15 prefix))
  • 76.86.0.0/15 (131 072 addresses (/15 prefix))
  • 76.90.0.0/15 (131 072 addresses (/15 prefix))
  • 76.50.0.0/15 (131 072 addresses (/15 prefix))
  • 66.91.0.0/16 (65 536 addresses (/16 prefix))
  • 67.49.0.0/16 (65 536 addresses (/16 prefix))
  • 66.27.0.0/16 (65 536 addresses (/16 prefix))
  • 76.88.0.0/16 (65 536 addresses (/16 prefix))
  • 191.1.0.0/16 (65 536 addresses (/16 prefix))
  • 76.93.0.0/16 (65 536 addresses (/16 prefix))
  • 69.75.0.0/16 (65 536 addresses (/16 prefix))
  • 50.113.0.0/16 (65 536 addresses (/16 prefix))
  • 173.196.0.0/16 (65 536 addresses (/16 prefix))
  • 24.43.0.0/16 (65 536 addresses (/16 prefix))
  • 75.80.0.0/16 (65 536 addresses (/16 prefix))
  • 72.134.0.0/16 (65 536 addresses (/16 prefix))
  • 76.53.0.0/16 (65 536 addresses (/16 prefix))
  • 72.132.0.0/16 (65 536 addresses (/16 prefix))
  • 76.176.0.0/16 (65 536 addresses (/16 prefix))
  • 98.147.0.0/16 (65 536 addresses (/16 prefix))
  • 142.129.0.0/16 (65 536 addresses (/16 prefix))
  • 72.130.0.0/16 (65 536 addresses (/16 prefix))
  • 70.95.0.0/16 (65 536 addresses (/16 prefix))
  • 70.93.0.0/16 (65 536 addresses (/16 prefix))
  • 76.79.128.0/17 (32 768 addresses (/17 prefix))
  • 24.24.128.0/17 (32 768 addresses (/17 prefix))
  • 101.61.0.0/17 (32 768 addresses (/17 prefix))
  • 76.54.0.0/17 (32 768 addresses (/17 prefix))
  • 198.72.128.0/17 (32 768 addresses (/17 prefix))
  • 101.60.0.0/17 (32 768 addresses (/17 prefix))
  • 72.129.0.0/17 (32 768 addresses (/17 prefix))
  • 76.89.128.0/17 (32 768 addresses (/17 prefix))
  • 165.162.0.0/17 (32 768 addresses (/17 prefix))
  • 98.145.128.0/17 (32 768 addresses (/17 prefix))

IPv6 Prefixes (20 total)

  • 2603:8000::/28
  • 2600:5c00::/32
  • 2603:803d::/32
  • 2605:e000::/32
  • 2606:6000::/32
  • 2603:8020::/33
  • 2602:107:4e00::/40
  • 2602:107:e300::/40
  • 2602:107:e600::/40
  • 2600:6c7f:93c0::/44
  • 2600:6c7f:9410::/44
  • 2602:107:4a10::/44