$ 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 7.6 million IPv4 addresses, including a /13, and supports IPv6. Most of its address space is geolocated to the United States, with additional presence in Canada and Malaysia, and smaller footprints in 2 additional countries.

  • 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
October 23, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
601 / 414
IPv6 Prefixes (raw / aggregated)
20 / 12
IPv4 Addresses
7 554 304
Largest IPv4 Prefix
/13 (524 288 addresses)
Largest IPv6 Prefix
/28
Geolocated Countries
🇺🇸 United States (7 552 512 IPs), 🇨🇦 Canada (512 IPs), 🇲🇾 Malaysia (256 IPs) and 2 more
Prefix Changed
October 04, 2026

Reputation

Reputation
Good — 139 flagged IPs out of 7 554 304 total (0.00%)
Open Proxies
5 known open proxies in this network

Connectivity Summary

Upstream Providers
2 upstreams providing transit
Peers
1 network exchanging traffic without transit
Downstream Customers
145 downstreams buying transit
Unclassified
12 unclassified BGP neighbors
Degree
160 unique BGP neighbors
Reach
149 networks in customer cone

Upstream Providers (2)

Prefix Lists

IPv4 Prefixes (601 total)

  • 76.168.0.0/13 (524 288 addresses (/13 prefix))
  • 172.112.0.0/13 (524 288 addresses (/13 prefix))
  • 23.240.0.0/14 (262 144 addresses (/14 prefix))
  • 45.48.0.0/14 (262 144 addresses (/14 prefix))
  • 76.80.0.0/14 (262 144 addresses (/14 prefix))
  • 98.148.0.0/14 (262 144 addresses (/14 prefix))
  • 98.152.0.0/14 (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))
  • 172.88.0.0/14 (262 144 addresses (/14 prefix))
  • 172.248.0.0/14 (262 144 addresses (/14 prefix))
  • 66.74.0.0/15 (131 072 addresses (/15 prefix))
  • 75.82.0.0/15 (131 072 addresses (/15 prefix))
  • 75.84.0.0/15 (131 072 addresses (/15 prefix))
  • 76.32.0.0/15 (131 072 addresses (/15 prefix))
  • 76.50.0.0/15 (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))
  • 76.94.0.0/15 (131 072 addresses (/15 prefix))
  • 76.166.0.0/15 (131 072 addresses (/15 prefix))
  • 24.43.0.0/16 (65 536 addresses (/16 prefix))
  • 50.113.0.0/16 (65 536 addresses (/16 prefix))
  • 66.27.0.0/16 (65 536 addresses (/16 prefix))
  • 66.91.0.0/16 (65 536 addresses (/16 prefix))
  • 67.49.0.0/16 (65 536 addresses (/16 prefix))
  • 69.75.0.0/16 (65 536 addresses (/16 prefix))
  • 70.93.0.0/16 (65 536 addresses (/16 prefix))
  • 70.95.0.0/16 (65 536 addresses (/16 prefix))
  • 72.130.0.0/16 (65 536 addresses (/16 prefix))
  • 72.132.0.0/16 (65 536 addresses (/16 prefix))
  • 72.134.0.0/16 (65 536 addresses (/16 prefix))
  • 75.80.0.0/16 (65 536 addresses (/16 prefix))
  • 76.53.0.0/16 (65 536 addresses (/16 prefix))
  • 76.88.0.0/16 (65 536 addresses (/16 prefix))
  • 76.93.0.0/16 (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))
  • 144.226.0.0/16 (65 536 addresses (/16 prefix))
  • 173.196.0.0/16 (65 536 addresses (/16 prefix))
  • 191.1.0.0/16 (65 536 addresses (/16 prefix))
  • 199.14.0.0/16 (65 536 addresses (/16 prefix))
  • 24.24.128.0/17 (32 768 addresses (/17 prefix))
  • 64.183.0.0/17 (32 768 addresses (/17 prefix))
  • 66.8.128.0/17 (32 768 addresses (/17 prefix))
  • 72.129.0.0/17 (32 768 addresses (/17 prefix))
  • 76.54.0.0/17 (32 768 addresses (/17 prefix))
  • 76.79.128.0/17 (32 768 addresses (/17 prefix))
  • 76.89.128.0/17 (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