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

AS39791

ASN

RIPE NCC

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS39791

NameTPS-AS

OrganisationCEZNETAS-MNT

Country –

RIRRIPE NCC

Allocated25.04.2006

Abuse contactnoc-telco@cez.cz

Network Overview

IPv4 Prefixes3

IPv6 Prefixes2

Upstreams (Transit)12

Downstreams (Customers)10

BGP Peers9

AS Path (BGP neighbours)

Upstreams (Transit)

AS1299Arelion (fka. Telia Carrier)AS14840BR.DIGITAL AS1764Next Layer Telecommunications AS22356Durand do Brasil Ltda AS263444Open X Tecnologia Ltda AS264409Huge Networks+6

AS39791TPS-AS

Downstreams (Customers)

AS198002CEZNET s.r.o.AS198161Sokolovska uhelna, pravni nastupce, a.s.AS201654CEZNET s.r.o.AS207015Position s.r.o.AS25424CEZNET s.r.o.AS43866Altron a.s.+4

Upstreams (Transit) (12)

AS1299Arelion (fka. Telia Carrier)

AS14840BR.DIGITAL

AS1764Next Layer Telecommunications

AS22356Durand do Brasil Ltda

AS263444Open X Tecnologia Ltda

AS264409Huge Networks

AS29208Quantcom, a.s.

AS4455IX Reach Ltd

AS6204INTERKVM HOST SRL

AS6663Türk Telekom International

AS6939Hurricane Electric LLC

AS8218Zayo Europe

Downstreams (Customers) (10)

AS198002CEZNET s.r.o.

AS198161Sokolovska uhelna, pravni nastupce, a.s.

AS201654CEZNET s.r.o.

AS207015Position s.r.o.

AS25424CEZNET s.r.o.

AS43866Altron a.s.

AS47493CEZNET s.r.o.

AS49101CEZNET s.r.o.

AS50975KYOCERA AVX Components s.r.o.

AS57728CEZNET s.r.o.

IPv4 Prefixes (3)

193.109.176.0/21

89.111.64.0/18

185.115.182.0/24

IPv6 Prefixes (2)

2a07:7a00::/48

2a01:a040::/32

BGP Peers (9)

AS198150SIACOM JSC

AS212483LEVEL EIGHTY-SIX COMMUNICATIONS LTD

AS24482SG.GS

AS29504Freenet Liberec, z.s.

AS36236NetActuate, Inc

AS40994Alwyzon (Hohl IT)

AS49544i3D.net B.V

AS51184Fonira Telekom GmbH

AS6881NIX.CZ z.s.p.o.

My IP ASN Lookup IP Lookup WHOIS DNS Lookup

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.