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

AS207187

ASN

RIPE NCC

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS207187

NameTKRJASEK

Organisationcz-tkrjasek-1-mnt

Country –

RIRRIPE NCC

Allocated16.08.2016

Abuse contactabuse@xgbe.cz

Network Overview

IPv4 Prefixes6

IPv6 Prefixes3

Upstreams (Transit)15

Downstreams (Customers)9

BGP Peers14

AS Path (BGP neighbours)

Upstreams (Transit)

AS14840BR.DIGITAL AS1764Next Layer Telecommunications AS20562Open Peering (Broadband Hosting B.V.)AS209810Netcore services s.r.o.AS22356Durand do Brasil Ltda AS263444Open X Tecnologia Ltda+9

AS207187TKRJASEK

Downstreams (Customers)

AS201265ANAFRA a.s.AS202551INERA.CZ s.r.o.AS204943NTV cable s.r.o.AS205044MOSES Internet s.r.o.AS205345HoralNET s.r.o.AS206420KABEL servis Praha spol. s r.o.+3

Upstreams (Transit) (15)

AS14840BR.DIGITAL

AS1764Next Layer Telecommunications

AS20562Open Peering (Broadband Hosting B.V.)

AS209810Netcore services s.r.o.

AS22356Durand do Brasil Ltda

AS263444Open X Tecnologia Ltda

AS264409Huge Networks

AS39392SH.cz s.r.o.

AS4455IX Reach Ltd

AS6204INTERKVM HOST SRL

AS6461Zayo Bandwidth

AS6663Türk Telekom International

AS6939

AS8218

AS8881

Downstreams (Customers) (9)

AS201265ANAFRA a.s.

AS202551INERA.CZ s.r.o.

AS204943NTV cable s.r.o.

AS205044MOSES Internet s.r.o.

AS205345HoralNET s.r.o.

AS206420KABEL servis Praha spol. s r.o.

AS207198Kabelova televize Koprivnice, s.r.o.

AS207242NOEL, s.r.o.

AS209810Netcore services s.r.o.

IPv4 Prefixes (6)

213.194.216.0/21

185.214.116.0/22

185.163.180.0/22

213.194.224.0/19

45.130.248.0/22

213.194.212.0/22

IPv6 Prefixes (3)

2a0e:59c0::/29

2a0b:99c0::/29

2a0a:1c00::/29

BGP Peers (14)

AS198150SIACOM JSC

AS212483LEVEL EIGHTY-SIX COMMUNICATIONS LTD

AS24482SG.GS

AS28917Fiord Networks, UAB

AS29504Freenet Liberec, z.s.

AS3212Telemach Slovenija d.o.o.

AS35369LINZ STROM GAS WAERME GmbH fuer Energiedienstleistungen und Telekommunikation

AS36236NetActuate, Inc

AS37721Virtual Technologies & Solutions

AS40994Alwyzon (Hohl IT)

AS47692Nessus GmbH

AS49544i3D.net B.V

AS51184

AS6881

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.