AS33651
Comcast Cable Communications, LLC
Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
- Baseline (neutral) 65
- Multiple-origin (MOAS) routing anomaly −12
- Isp allocation +5
- Trust score 58 / 100
Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
About Xfinity
Comcast Cable Communications, doing business as Xfinity, is an American telecommunications business segment and division of Comcast Corporation. It is used to market consumer cable television, internet, telephone, and wireless services provided by the company.
⚠ 28 MOAS prefixes — multiple origin ASNs detected
All MOAS anomalies →A previously stable prefix originated by AS33651 is now also announced by another ASN (MOAS — Multiple-Origin AS), detected from our RIPE RIS collectors. Often benign (anycast, multi-homing, or a recent transfer) — but it can signal a route leak or prefix hijack, so it's worth inspecting.
| Prefix | Origin ASNs | Last detected (UTC) |
|---|---|---|
| 138.226.112.0/21 | AS33651, AS33667 | 2026-07-23 15:53:30 |
| 198.145.106.0/24 | AS33651, AS33667 | 2026-07-23 15:53:30 |
| 139.181.26.0/24 | AS33651, AS33667 | 2026-07-23 15:53:30 |
| 103.216.197.0/24 | AS33651, AS33667 | 2026-07-23 15:53:30 |
| 138.226.48.0/21 | AS33651, AS33667 | 2026-07-23 15:53:30 |
| 9.142.118.0/23 | AS33651, AS33667 | 2026-07-23 15:53:30 |
| 185.201.41.0/24 | AS33651, AS33667 | 2026-07-23 15:53:30 |
| 138.226.64.0/20 | AS33651, AS33667 | 2026-07-23 15:53:30 |
| 192.189.161.0/24 | AS33651, AS33667 | 2026-07-23 15:53:30 |
| 78.31.206.0/24 | AS33651, AS33667 | 2026-07-23 15:53:30 |
| 9.142.96.0/19 | AS33651, AS33667 | 2026-07-23 15:53:30 |
| 63.246.159.0/24 | AS33651, AS33667 | 2026-07-23 15:53:30 |
| 169.230.76.0/24 | AS33651, AS33667 | 2026-07-23 15:53:30 |
| 169.230.77.0/24 | AS33651, AS33667 | 2026-07-22 23:23:24 |
| 198.202.219.0/24 | AS33651, AS33667 | 2026-07-22 23:23:24 |
Showing the 15 most recently detected of 28 MOAS prefixes. Many multi-origin prefixes on large networks are benign (anycast); see all MOAS anomalies.
Network profile
Source: PeeringDB →Top CIDR ranges
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS33651 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.
| Prefix | Announcement samples | Last seen |
|---|---|---|
| 50.235.233.0/24 | 121,892 | 2026-07-23 15:45:57 |
| 50.201.8.0/23 | 18,092 | 2026-07-23 15:45:55 |
| 138.226.192.0/21 | 15,068 | 2026-07-23 14:38:00 |
| 50.235.21.0/24 | 12,844 | 2026-07-23 15:46:00 |
| 135.132.72.0/22 | 12,218 | 2026-06-26 23:29:48 |
| 135.132.76.0/22 | 12,207 | 2026-06-26 23:29:48 |
| 50.204.137.0/24 | 11,998 | 2026-07-23 15:43:18 |
| 50.207.216.0/24 | 10,734 | 2026-07-23 15:45:47 |
| 50.235.20.0/24 | 10,288 | 2026-07-23 15:46:00 |
| 198.145.106.0/24 | 9,723 | 2026-07-23 14:35:59 |
| 216.170.120.0/24 | 9,574 | 2026-07-23 14:36:28 |
| 50.224.7.0/24 | 9,467 | 2026-07-23 15:46:12 |
| 50.206.120.0/23 | 9,458 | 2026-07-23 15:46:12 |
| 24.104.150.0/24 | 9,435 | 2026-07-23 15:46:11 |
| 69.91.146.0/24 | 9,427 | 2026-07-23 14:37:19 |
| 50.227.120.0/24 | 9,426 | 2026-07-23 15:45:57 |
| 50.218.46.0/24 | 9,129 | 2026-07-23 15:45:48 |
| 64.84.96.0/21 | 8,210 | 2026-07-23 15:08:40 |
| 64.84.120.0/21 | 8,202 | 2026-07-23 15:08:40 |
| 50.204.119.0/24 | 8,127 | 2026-07-23 15:45:04 |
| 50.207.190.0/24 | 7,931 | 2026-07-23 15:45:04 |
| 50.216.212.0/24 | 7,801 | 2026-07-23 15:45:04 |
| 50.206.219.0/24 | 7,523 | 2026-07-23 15:45:04 |
| 50.200.170.0/24 | 7,517 | 2026-07-23 15:45:04 |
| 24.104.73.0/24 | 7,516 | 2026-07-23 15:45:04 |
| 50.206.118.0/24 | 7,516 | 2026-07-23 15:45:04 |
| 50.201.171.0/24 | 7,512 | 2026-07-23 15:45:04 |
| 50.145.55.0/24 | 7,501 | 2026-07-23 15:45:04 |
| 50.232.196.0/24 | 7,492 | 2026-07-23 15:45:04 |
| 50.234.130.0/24 | 7,490 | 2026-07-23 15:45:04 |
| 50.230.66.0/24 | 7,490 | 2026-07-23 15:45:04 |
| 50.207.182.0/24 | 7,490 | 2026-07-23 15:45:04 |
| 50.219.139.0/24 | 7,486 | 2026-07-23 15:45:04 |
| 50.205.226.0/24 | 7,480 | 2026-07-23 15:45:04 |
| 24.104.138.0/23 | 7,474 | 2026-07-23 15:45:04 |
| 50.233.45.0/24 | 7,469 | 2026-07-23 15:45:04 |
| 50.236.66.0/24 | 7,467 | 2026-07-23 15:45:04 |
| 24.104.72.0/24 | 7,454 | 2026-07-23 15:45:04 |
| 50.228.130.0/24 | 7,445 | 2026-07-23 15:45:04 |
| 50.222.26.0/24 | 7,445 | 2026-07-23 15:45:04 |
| 50.231.143.0/24 | 7,419 | 2026-07-23 15:45:04 |
| 50.227.186.0/24 | 7,399 | 2026-07-23 15:45:04 |
| 50.222.50.0/24 | 7,391 | 2026-07-23 15:45:04 |
| 50.239.184.0/24 | 7,389 | 2026-07-23 15:45:04 |
| 50.216.23.0/24 | 7,385 | 2026-07-23 15:45:04 |
| 50.229.212.0/24 | 7,342 | 2026-07-23 15:45:04 |
| 107.0.21.0/24 | 7,308 | 2026-07-23 15:45:04 |
| 64.189.18.0/24 | 7,175 | 2026-07-23 15:08:40 |
| 139.181.26.0/24 | 7,154 | 2026-07-23 14:38:00 |
| 209.23.253.0/24 | 7,062 | 2026-07-23 15:45:04 |
Showing top 50 of 96 announced prefixes by sample volume.
Frequently Asked Questions
What is AS33651?
AS33651 is an Autonomous System Number assigned to Comcast Cable Communications, LLC. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).
How many IP addresses does AS33651 announce?
AS33651 announces 21.2K IPv4 addresses distributed across 50 routed CIDR prefixes. The network is registered in United States.
Who operates AS33651?
AS33651 is operated by Comcast Cable Communications, LLC. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS33651 registered in?
AS33651 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
