AS19720
Cablevision Systems Corp.
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
- Isp allocation +5
- Trust score 70 / 100
Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 167.206.122.0/23 | 512 |
68.6%
|
Cablevision Systems Corp. | US | — | — |
| 216.2.194.0/23 | 512 |
14.6%
|
Cablevision Systems Corp. | US | New York | Levittown |
| 65.51.29.0/24 | 256 |
1.2%
|
Cablevision Systems Corp. | US | — | — |
| 65.51.31.0/24 | 256 |
96.5%
|
Cablevision Systems Corp. | US | — | — |
| 167.206.119.0/24 | 256 |
69.1%
|
Cablevision Systems Corp. | US | — | — |
| 167.206.120.0/24 | 256 |
72.7%
|
Cablevision Systems Corp. | US | — | — |
| 216.2.193.0/24 | 256 |
8.6%
|
Cablevision Systems Corp. | US | New York | Levittown |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS19720 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 |
|---|---|---|
| 216.2.193.0/24 | 5,218 | 2026-07-18 12:01:28 |
| 167.206.123.0/24 | 5,126 | 2026-07-18 12:01:28 |
| 167.206.120.0/24 | 5,113 | 2026-07-18 12:01:28 |
| 167.206.119.0/24 | 5,112 | 2026-07-18 12:01:28 |
| 167.206.122.0/24 | 5,110 | 2026-07-18 12:01:28 |
| 65.51.31.0/24 | 4,297 | 2026-07-18 11:59:59 |
| 65.51.29.0/24 | 4,290 | 2026-07-18 11:59:59 |
| 216.2.195.0/24 | 4,093 | 2026-07-18 11:59:59 |
| 216.2.194.0/24 | 4,053 | 2026-07-18 11:59:59 |
Frequently Asked Questions
What is AS19720?
AS19720 is an Autonomous System Number assigned to Cablevision Systems Corp.. 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 AS19720 announce?
AS19720 announces 2.3K IPv4 addresses distributed across 7 routed CIDR prefixes. The network is registered in United States.
Who operates AS19720?
AS19720 is operated by Cablevision Systems Corp.. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS19720 registered in?
AS19720 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
