Network report

Who holds an IP address, prefix or AS number, how it is routed (origin AS, RPKI, IRR), its reverse DNS, blocklist listings and PeeringDB record, with what to fix first.

AS6128 · 1 second ago

curl -s "https://thenetworkery.com/api/v1/network-report?query=AS6128"

JSON Docs

Warning: AS6128 (CABLE-NET-1) announces 81 IPv4 and 10 IPv6 prefixes. 3 warnings

AS page	AS6128
Holder	CABLE-NET-1 - Cablevision Systems Corp.
Allocation	ARIN, United States (US), assigned
Prefixes (IPv4 / IPv6)	81 / 10
RPKI valid	79% (72 / 91)
Upstreams and peers	23
Peering policy	Open

What to fix

Warning

10 of 91 announced prefixes have no ROA (RPKI not found): 47.16.0.0/14, 64.15.0.0/16, 65.19.0.0/16, 167.206.0.0/19, 167.206.32.0/21 (+5).

Without a ROA, networks cannot tell your routes from a hijack.

Fix: Create a ROA for each at your RIR portal, with origin AS6128 and a max length equal to the prefix length:

47.16.0.0/14 AS6128 max-length /14
64.15.0.0/16 AS6128 max-length /16
65.19.0.0/16 AS6128 max-length /16
167.206.0.0/19 AS6128 max-length /19
167.206.32.0/21 AS6128 max-length /21
167.206.40.0/22 AS6128 max-length /22
167.206.44.0/24 AS6128 max-length /24
167.206.45.0/24 AS6128 max-length /24
167.206.46.0/23 AS6128 max-length /23
167.206.48.0/20 AS6128 max-length /20

Open in RPKI / ROA validator Guide

Warning
33 of 91 announced prefixes have no IRR route object: 24.189.218.0/24, 167.206.116.0/23, 167.206.64.0/19, 2600:4808::/30, 69.27.228.0/24 (+28).

Many networks build their prefix filters from IRR data; without route objects some of them drop the routes.

Fix: Create route (IPv4) and route6 (IPv6) objects with origin AS6128 in your RIR’s IRR database (or RADB).
```
route: 24.189.218.0/24
origin: AS6128

route: 167.206.116.0/23
origin: AS6128

route: 167.206.64.0/19
origin: AS6128
```
Open in ASN & BGP prefix lookup
Warning

No public NOC, policy or technical contact.

Other networks use these addresses to set up peering and to reach you during an incident.

Fix: Add a role contact (for example noc@ or peering@ an address you monitor) with visibility Public.

Open in PeeringDB lookup

Checks

Routing and RPKI 10 of 91 announced prefixes have no ROA (RPKI not found): 47.16.0.0/14, 64.15.0.0/16, 65.19.0.0/16, 167.206.0.0/19, 167.206.32.0/21 (+5).

Pass: AS6128 announces 81 IPv4 and 10 IPv6 prefixes.
Warning: 10 of 91 announced prefixes have no ROA (RPKI not found): 47.16.0.0/14, 64.15.0.0/16, 65.19.0.0/16, 167.206.0.0/19, 167.206.32.0/21 (+5).
Info: 72 of 91 announced prefixes are RPKI valid.
Info: The RPKI state of 9 prefixes was not looked up (no ROA of AS6128 covers them; only the first 10 are checked).
Warning: 33 of 91 announced prefixes have no IRR route object: 24.189.218.0/24, 167.206.116.0/23, 167.206.64.0/19, 2600:4808::/30, 69.27.228.0/24 (+28).
Info: 23 upstreams and peers, 3 downstream networks seen.

Holder	CABLE-NET-1 - Cablevision Systems Corp.
IPv4 prefixes	81
IPv6 prefixes	10
RPKI	72 valid · 10 not found · 9 not looked up
Without IRR route object	33
Downstream networks	3

Routes to fix

Prefix	RPKI
47.16.0.0/14	No ROA
64.15.0.0/16	No ROA
65.19.0.0/16	No ROA
167.206.0.0/19	No ROA
167.206.32.0/21	No ROA
167.206.40.0/22	No ROA
167.206.44.0/24	No ROA
167.206.45.0/24	No ROA
167.206.46.0/23	No ROA
167.206.48.0/20	No ROA

Upstreams and peers seen to the left 23

AS6461 Zayo AS174 Cogent Communications, Inc. AS6939 Hurricane Electric AS9002 RETN AS1299 Arelion (Twelve99) AS3491 PCCW Global AS3303 Swisscom AS33891 Core-Backbone AS60068 CDN77 AS1273 Vodafone Global Network AS13786 Seaborn AS1031 PEER-1

Announced prefixes 91

24.38.0.0/17 24.38.192.0/18 24.44.0.0/14 24.89.128.0/18 24.146.128.0/17 24.157.32.0/19 24.157.51.0/24 24.184.0.0/14 24.188.0.0/14 24.189.218.0/24 24.228.0.0/16 24.246.96.0/19 47.16.0.0/14 47.16.0.0/15 47.18.0.0/16 47.20.0.0/14 50.29.0.0/17 63.142.20.0/24 63.247.160.0/19 64.15.0.0/16 65.19.0.0/16 67.80.0.0/13 67.80.0.0/14 67.84.0.0/14 68.192.0.0/13 68.192.0.0/14 68.196.0.0/14 69.27.224.0/19 69.27.228.0/24 69.112.0.0/13 69.112.0.0/14 69.116.0.0/14 69.120.0.0/13 69.120.0.0/14 69.124.0.0/14 74.88.0.0/15 74.89.0.0/24 74.90.0.0/16 75.99.0.0/16 75.127.128.0/17 96.56.0.0/15 104.148.128.0/17 104.246.0.0/17 107.188.0.0/17 108.58.0.0/16 108.162.0.0/18 108.170.64.0/18 108.179.0.0/18 142.54.64.0/18 144.62.128.0/17 148.74.0.0/15 148.76.0.0/18 148.76.192.0/19 148.76.224.0/19 148.77.128.0/17 162.216.56.0/21 167.206.0.0/19 167.206.32.0/21 167.206.40.0/22 167.206.44.0/24 167.206.45.0/24 167.206.46.0/23 167.206.48.0/20 167.206.64.0/19 167.206.96.0/20 167.206.112.0/22 167.206.113.0/24 167.206.116.0/23 167.206.121.0/24 167.206.124.0/22 167.206.128.0/17 173.2.0.0/15 173.220.0.0/16 173.229.64.0/18 173.251.0.0/17 174.44.0.0/16 192.208.120.0/21 198.46.96.0/19 198.182.247.0/24 209.140.32.0/19 216.255.96.0/19 2600:480a::/32 2600:480b::/32 2600:480c::/30 2600:4800::/28 2600:4800::/30 2600:4804::/30 2600:4808::/30 2600:4808::/32 2600:4809::/32 2602:230::/32

Source: RIPEstat (RIPE NCC RIS, Routinator, IRR); AS names: Team Cymru

Open in ASN & BGP prefix lookup

Registration Found at rdap.arin.net.

Pass: Found at rdap.arin.net.

Name	CABLE-NET-1
Handle	AS6128
Range	AS6128
Status	active
Last changed	2023-02-07T14:31:34-05:00
Abuse contact	abuse@cv.net

Allocation

Registry (RIR)	ARIN
Country	United States (US)
Status	Assigned
Delegated range	AS6128

Source: RIR delegation data, updated daily. The country is where the range was registered, not necessarily where it is used.

Contacts

Role	Name	Email
registrant	Cablevision Systems Corp.

Source: https://rdap.arin.net/registry/autnum/6128. Registration data from rdap.arin.net, shown under its terms of use (terms): not for marketing or bulk collection.

Open in WHOIS / RDAP lookup

PeeringDB No public NOC, policy or technical contact.

Pass: AS6128 is in PeeringDB as Cablevision Systems Corporation.
Info: Peering policy: Open.
Info: Present at 4 internet exchanges with 7 ports (730G in total).
Warning: No public NOC, policy or technical contact.

Network	Cablevision Systems Corporation (Altice USA)
AS number	AS6128
Type	Cable/DSL/ISP, North America
Website	http://www.optimum.net
IRR as-set	ARIN::AS6128:AS-CUSTOMERS
Prefixes (IPv4 / IPv6)	2000 / 1000
Traffic	1-5Tbps, Mostly Inbound
Peering policy	Open
Locations	Not Required
Ratio required	No
Contracts	Not Required
Last updated	2026-11-02

Source: PeeringDB. Results are cached for an hour.

Open in PeeringDB lookup