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

AS20001 — TWC-20001-PACWEST

Charter Communications Inc

AS20001 is a major transit provider run by Charter Communications Inc, established in the United States in 2001. The network announces an impressive 6.9 million IPv4 addresses, including a /13. Supports IPv6.

  • 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
March 04, 2026

Prefix Summary

IPv4 Prefixes (raw / aggregated)
457 / 306
IPv6 Prefixes (raw / aggregated)
20 / 12
IPv4 Addresses
6 944 512
Largest IPv4 Prefix
/13 (524 288 addresses)
Largest IPv6 Prefix
/28
Geolocated Countries
🇺🇸 US (1 905 IPs), 🇦🇺 AU (7 IPs), 🇨🇦 CA (6 IPs), 🇭🇰 HK, 🇲🇾 MY, 🇹🇷 TR, 🇿🇦 ZA
Prefix Changed
March 04, 2026

Reputation

Reputation
Good — 112 flagged IPs out of 6 944 512 total (0.00%)
Open Proxies
3 known open proxies in this network

Connectivity Summary

Upstream Providers
3 upstream autonomous systems providing transit
Peers
2 autonomous systems exchanging traffic without transit fees
Downstream Customers
148 downstream autonomous systems buying transit
Degree
157 unique BGP neighbors (providers + customers + peers)
Reach
208 — customer cone size measuring network influence
Degree Rank
#910
Reach Rank
#824

Upstream Providers (3)

Prefix Lists

IPv4 Prefixes (457 total)

  • 76.168.0.0/13 (524 288 addresses)
  • 172.112.0.0/13 (524 288 addresses)
  • 23.240.0.0/14 (262 144 addresses)
  • 45.48.0.0/14 (262 144 addresses)
  • 76.80.0.0/14 (262 144 addresses)
  • 98.148.0.0/14 (262 144 addresses)
  • 98.152.0.0/14 (262 144 addresses)
  • 104.32.0.0/14 (262 144 addresses)
  • 104.172.0.0/14 (262 144 addresses)
  • 172.88.0.0/14 (262 144 addresses)
  • 172.248.0.0/14 (262 144 addresses)
  • 66.74.0.0/15 (131 072 addresses)
  • 75.82.0.0/15 (131 072 addresses)
  • 75.84.0.0/15 (131 072 addresses)
  • 76.32.0.0/15 (131 072 addresses)
  • 76.50.0.0/15 (131 072 addresses)
  • 76.86.0.0/15 (131 072 addresses)
  • 76.90.0.0/15 (131 072 addresses)
  • 76.94.0.0/15 (131 072 addresses)
  • 76.166.0.0/15 (131 072 addresses)
  • 24.43.0.0/16 (65 536 addresses)
  • 50.113.0.0/16 (65 536 addresses)
  • 66.27.0.0/16 (65 536 addresses)
  • 66.91.0.0/16 (65 536 addresses)
  • 67.49.0.0/16 (65 536 addresses)
  • 69.75.0.0/16 (65 536 addresses)
  • 70.93.0.0/16 (65 536 addresses)
  • 70.95.0.0/16 (65 536 addresses)
  • 72.130.0.0/16 (65 536 addresses)
  • 72.132.0.0/16 (65 536 addresses)
  • 72.134.0.0/16 (65 536 addresses)
  • 75.80.0.0/16 (65 536 addresses)
  • 76.53.0.0/16 (65 536 addresses)
  • 76.88.0.0/16 (65 536 addresses)
  • 76.93.0.0/16 (65 536 addresses)
  • 76.176.0.0/16 (65 536 addresses)
  • 98.147.0.0/16 (65 536 addresses)
  • 142.129.0.0/16 (65 536 addresses)
  • 173.196.0.0/16 (65 536 addresses)
  • 24.24.128.0/17 (32 768 addresses)
  • 64.183.0.0/17 (32 768 addresses)
  • 66.8.128.0/17 (32 768 addresses)
  • 72.129.0.0/17 (32 768 addresses)
  • 76.54.0.0/17 (32 768 addresses)
  • 76.79.128.0/17 (32 768 addresses)
  • 76.89.128.0/17 (32 768 addresses)
  • 98.145.128.0/17 (32 768 addresses)
  • 165.162.0.0/17 (32 768 addresses)
  • 173.198.0.0/17 (32 768 addresses)
  • 198.72.128.0/17 (32 768 addresses)

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