An Autonomous System Number (ASN) is a unique number assigned to a network in global internet routing. Every provider that participates directly on the internet has its own ASN (e.g. AS15169 for Google).

What are upstreams, peers and prefixes?

Upstreams are transit providers through which an AS reaches the internet. Peers are networks with direct traffic exchange. Prefixes are the IP address ranges the AS announces via BGP.

Where does the ASN data come from?

The data comes from the official RDAP services of the RIRs (RIPE, ARIN, etc.) and from RIPEstat (prefixes and neighbour ASNs).

ASN Lookup – Networks, Upstreams and Prefixes

AS33662

ASN

ARIN

RIR

IPv4 Prefixes

105

IPv6 Prefixes

AS Information

ASNAS33662

NameCMCS

OrganisationComcast Cable Communications, LLC

Country –

RIRARIN

Allocated16.02.2005

Network Overview

IPv4 Prefixes15

IPv6 Prefixes105

Upstreams (Transit)2

Downstreams (Customers)55

BGP Peers0

AS Path (BGP neighbours)

Upstreams (Transit)

AS3356Lumen (Level 3)AS7922Comcast Cable Communications, LLC

AS33662CMCS

Downstreams (Customers)

AS11135Cross Development/Montgomery LP AS13423GALVESTON ISD AS13435Community Health Choice, Inc.AS13913Affiliated Monitoring, Inc.AS14010Jack Henry & Associates, Inc.AS14296Spring Fire Department+49

Upstreams (Transit) (2)

AS3356Lumen (Level 3)

AS7922Comcast Cable Communications, LLC

Downstreams (Customers) (55)

AS11135Cross Development/Montgomery LP

AS13423GALVESTON ISD

AS13435Community Health Choice, Inc.

AS13913Affiliated Monitoring, Inc.

AS14010Jack Henry & Associates, Inc.

AS14296Spring Fire Department

AS16746CenterPoint Energy, Inc.

AS16903Texas Southern University

AS17035NBCUniversal

AS18996City of Baytown

AS19195MEGLOBAL AMERICAS INC.

AS19426Harris County ESD 11 Mobile Healthcare

IPv4 Prefixes (15)

50.232.206.0/24

64.189.25.0/24

50.228.194.0/24

50.234.8.0/24

50.201.112.0/24

50.232.18.0/24

50.228.10.0/24

208.110.207.0/24

50.217.18.0/24

198.46.65.0/24

50.235.195.0/24

50.231.217.0/24

50.220.66.0/24

50.235.196.0/24

24.104.75.0/24

IPv6 Prefixes (105)

2001:559:5ab::/48

2001:559:c256::/48

2001:559:86d6::/48

2001:559:8424::/48

2001:559:8772::/48

2001:559:154::/48

2001:559:3e3::/48

2001:559:c3ae::/48

2001:559:c450::/48

2001:559:83c1::/48

2001:559:c56a::/48

2001:559:c424::/48

2001:559:8748::/48

2001:559:153::/48

2001:559:8771::/48

2001:559:85d7::/48

2001:559:c37e::/48

2001:559:3e4::/48

2001:559:c26f::/48

2001:559:c200::/48

2001:559:c243::/48

2001:559:85ed::/48

2001:559:85ac::/48

2001:559:c37f::/48

2001:559:852f::/48

2001:559:1f2::/48

2001:559:334::/48

2001:559:c42d::/48

2001:559:c181::/48

2001:559:c552::/48

2001:559:265::/48

2001:559:8739::/48

2001:559:c157::/48

2001:559:804d::/48

2001:559:c1fe::/48

2001:559:18c::/48

2001:559:863f::/48

2001:559:81f4::/48

2001:559:84b7::/48

2001:559:86d7::/48

2001:559:287::/48

2001:559:c554::/48

2001:559:c223::/48

2001:559:8603::/48

2001:559:c020::/48

2001:559:c289::/48

2001:559:81c9::/48

2001:559:392::/48

2001:559:42::/48

2001:559:c374::/48

2001:559:c42f::/48

2001:559:8172::/48

2001:559:8156::/48

2001:559:86d8::/48

2001:559:85f8::/48

2001:559:c1ff::/48

2001:559:85d9::/48

2001:559:87d0::/48

2001:559:8168::/48

2001:559:256::/48

2001:559:8472::/48

2001:559:397::/48

2001:559:c23f::/48

2001:559:c254::/48

2001:559:85e9::/48

2001:559:c021::/48

2001:559:1b3::/48

2001:559:c506::/48

2001:559:c2d0::/48

2001:559:852e::/48

2001:559:4b7::/48

2001:559:c1a6::/48

2001:559:c404::/48

2001:559:182::/48

2001:559:85ce::/48

2001:559:4fe::/48

2001:559:728::/48

2001:559:857b::/48

2001:559:85cf::/48

2001:559:38d::/48

2001:559:c4e2::/48

2001:559:852d::/48

2001:559:398::/48

2001:559:c452::/48

2001:559:130::/48

2001:559:83de::/48

2001:559:866f::/48

2001:559:8311::/48

2001:559:c46f::/48

2001:559:85d0::/48

2001:559:c1fc::/48

2001:559:86ae::/48

2001:559:c257::/48

2001:559:83fa::/48

2001:559:8012::/48

2001:559:c20f::/48

2001:559:3ed::/48

2001:559:12f::/48

2001:559:351::/48

2001:559:1e9::/48

2001:559:8783::/48

2001:559:c0e8::/48

2001:559:c410::/48

2001:559:8544::/48

2001:559:c417::/48

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What is an ASN?

An Autonomous System Number (ASN) is a unique number assigned to a network on the internet. Upstreams are the transit providers through which the AS reaches the internet. Peers are networks with which direct traffic exchange takes place. Prefixes are the IP address ranges that the AS announces to the internet. Data via RIPE NCC RDAP and RIPEstat API.