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Autonomous System

AS6128 · Cablevision Systems Corp.

Overview

AS6128 is announced on the Internet: RIPE RIS route collectors currently see 81 IPv4 prefixes and 10 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 5,057,792 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 26 upstream neighbours (transit providers or peers) and 3 downstream neighbours (customers or networks it carries). Its most visible upstreams are Zayo Bandwidth (AS6461), Hurricane Electric LLC (AS6939), and Cogent Communications, LLC (AS174). AS6128 was assigned by ARIN, and its registration country is United States.

Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 17, 2026 at 5:44 AM UTC. This page is refreshed at most every 12 hours.

Go further

Trace a route to this networkOpen in the BGP viewerWHOIS of 67.80.0.1

The trace goes to 67.80.0.1, the first address of 67.80.0.0/13. An address picked inside a prefix may not answer (nothing listens there, or the network filters probes): the trace then shows the path up to the last network that replies.

Announced prefixes

IPv4 prefixes (81 prefixes)

PrefixAddresses
24.38.0.0/1732,768
24.38.192.0/1816,384
24.44.0.0/14262,144
24.89.128.0/1816,384
24.146.128.0/1732,768
24.157.32.0/198,192
24.157.51.0/24256
24.184.0.0/14262,144
24.188.0.0/14262,144
24.189.218.0/24256
24.228.0.0/1665,536
24.246.96.0/198,192
47.16.0.0/14262,144
47.16.0.0/15131,072
47.18.0.0/1665,536
47.20.0.0/14262,144
50.29.0.0/1732,768
63.142.20.0/24256
63.247.160.0/198,192
64.15.0.0/1665,536
65.19.0.0/1665,536
67.80.0.0/13524,288
67.80.0.0/14262,144
67.84.0.0/14262,144
68.192.0.0/13524,288
68.192.0.0/14262,144
68.196.0.0/14262,144
69.27.224.0/198,192
69.27.228.0/24256
69.112.0.0/13524,288
69.112.0.0/14262,144
69.116.0.0/14262,144
69.120.0.0/13524,288
69.120.0.0/14262,144
69.124.0.0/14262,144
74.88.0.0/15131,072
74.89.0.0/24256
74.90.0.0/1665,536
75.99.0.0/1665,536
75.127.128.0/1732,768
96.56.0.0/15131,072
104.148.128.0/1732,768
104.246.0.0/1732,768
107.188.0.0/1732,768
108.58.0.0/1665,536
108.162.0.0/1816,384
108.170.64.0/1816,384
108.179.0.0/1816,384
142.54.64.0/1816,384
144.62.128.0/1732,768
148.74.0.0/15131,072
148.76.0.0/1816,384
148.76.192.0/198,192
148.76.224.0/198,192
148.77.128.0/1732,768
162.216.56.0/212,048
167.206.0.0/198,192
167.206.32.0/212,048
167.206.40.0/221,024
167.206.44.0/24256
167.206.45.0/24256
167.206.46.0/23512
167.206.48.0/204,096
167.206.64.0/198,192
167.206.96.0/204,096
167.206.112.0/221,024
167.206.113.0/24256
167.206.116.0/23512
167.206.121.0/24256
167.206.124.0/221,024
167.206.128.0/1732,768
173.2.0.0/15131,072
173.220.0.0/1665,536
173.229.64.0/1816,384
173.251.0.0/1732,768
174.44.0.0/1665,536
192.208.120.0/212,048
198.46.96.0/198,192
198.182.247.0/24256
209.140.32.0/198,192
216.255.96.0/198,192

IPv6 prefixes (10 prefixes)

Prefix
2600:4800::/28
2600:4800::/30
2600:4804::/30
2600:4808::/30
2600:4808::/32
2600:4809::/32
2600:480a::/32
2600:480b::/32
2600:480c::/30
2602:230::/32

Neighbours

Upstreams (transit or peers) (26)

ASNetworkVisibility
AS6461Zayo Bandwidth34,618
AS6939Hurricane Electric LLC6,482
AS174Cogent Communications, LLC6,165
AS9002RETN Limited3,616
AS1299Arelion Sweden AB2,631
AS3491PCCW Global (HK) Ltd.1,682
AS3303Swisscom (Schweiz) AG1,179
AS33891Core-Backbone GmbH904
AS13786Seabras 1 USA, LLC648
AS60068Datacamp Limited587
AS52320GlobeNet Cabos Submarinos Colombia, S.A.S.550
AS1273IDDQD-AS516
AS8220COLT Technology Services Group Limited452
AS137409GSL Networks Pty LTD363
AS8359MTS PJSC354
AS37468Angola Cables298
AS577Bell Canada258
AS3737PenTeleData Inc.256
AS7195EDGEUNO S.A.S197
AS6204INTERKVM HOST SRL193
AS19108Optimum18
AS5400British Telecommunications Limited10
AS41095IPTP LTD4
AS46450Pilot Fiber, Inc.4
AS20326TeraSwitch Networks Inc.1
AS262761Sinal Br Telecom Ltda1

Downstreams (customers) (3)

ASNetworkVisibility
AS54004Cablevision Lightpath LLC62,499
AS20940Akamai International B.V.480
AS19720Cablevision Systems Corp.445

13 more neighbours appear on both sides of this network depending on the path, so they are counted in neither list.

Visibility is RIPEstat's count of how often the route collectors observed the link. It compares neighbours with each other; it is not a traffic volume.

How to read this page

An Autonomous System (AS) is a network run under one routing policy: an internet provider, a cloud, a content network, a university. Each one has a number, its ASN, assigned by a regional registry (ARIN, RIPE NCC, APNIC, LACNIC, AFRINIC), and uses BGP, the protocol networks use to tell each other where addresses are, to announce the blocks of addresses it delivers to.

A prefix such as 203.0.113.0/24 is a block of addresses: the number after the slash says how many bits are fixed, so a /24 holds 256 IPv4 addresses and a /16 holds 65,536. Networks often announce a large block and smaller pieces of it at the same time, which is why the address total counts each address once.

Neighbours come from the paths themselves. A network that appears just before this one in a path, on the collector's side, is an upstream: a transit provider or a peer. One that appears just after it is a downstream, usually a customer. Peering at an internet exchange also shows up as an upstream, so the upstream list is not a list of paid transit.

The data comes from RIPEstat, run by the RIPE NCC, which gathers the routing tables of hundreds of networks through its RIS route collectors. This page reads it when it is visited and keeps it for 12 hours at most; the BGP viewer reads it live.

Frequently asked questions

How do I find the ASN of an IP address?
Type the address in the BGP viewer: it shows the prefix that covers it, the AS that originates that prefix and the paths seen towards it. A traceroute also names the network of each hop, so you can see every AS a connection crosses.
Why does one company have several ASNs?
Large operators split their network by region, by activity or by history: a cloud may use one number for its backbone and another for a region, and every acquisition brings its own numbers. Each number has its own page, with its own prefixes and neighbours.
Why do prefix counts differ from one site to another?
Each source sees the routing table from different collectors, at a different time, and counts differently: some include prefixes withdrawn in recent weeks, some merge a block and its pieces. This page counts the prefixes RIPE RIS collectors see originated by the network at the end of the latest two-week window, and counts each IPv4 address once.
Is this the list of IP ranges of a cloud provider?
It is what its networks announce, which is what the Internet routes to them. Many providers also publish an official list of ranges per service and region; that list is the reference for firewall rules, because a range can be announced before it is used, or announced by another of their AS numbers.