$ query “AS33666” --type=asn → 1 result(s)
AS33666 · CMCS
Comcast Cable Communications LLC
AS33666 is owned by Comcast Cable Communications LLC and is a residential access provider, established in the United States in 2005. The system announces 768 IPv4 addresses, and supports IPv6. Most of its address space is geolocated to the United States.
Basic Information
- Country
- 🇺🇸 United States
- Category
- Internet Service Provider
- Network Role
- Access Provider
- Data Origin
- Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
- Registered
- February 16, 2005
- Last Changed
- May 01, 2026
- Last Seen
- May 18, 2026 (active)
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 3 / 3
- IPv6 Prefixes (raw / aggregated)
- 3 / 3
- IPv4 Addresses
- 768
- Largest IPv4 Prefix
- /24 (256 addresses)
- Largest IPv6 Prefix
- /48
- Geolocated Countries
- 🇺🇸 United States (1 024 IPs)
- Prefix Changed
- May 07, 2026
Reputation
- Reputation
- Pristine — 0 flagged IPs
Connectivity Summary
- Upstream Providers
- 1 upstream providing transit
- Peers
- 1 network exchanging traffic without transit
- Downstream Customers
- 4 downstreams buying transit
- Degree
- 6 unique BGP neighbors
- Reach
- 4 networks in customer cone
Upstream Providers (1)
- AS7922 — COMCAST-7922
Prefix Lists
IPv4 Prefixes (3 total)
- 66.170.177.0/24 (256 addresses (/24 prefix))
- 66.170.179.0/24 (256 addresses (/24 prefix))
- 199.120.255.0/24 (256 addresses (/24 prefix))
IPv6 Prefixes (3 total)
- 2001:559:195::/48
- 2001:559:233::/48
- 2001:559:c507::/48