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

AS25248

ASN

RIPE NCC

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS25248

NameBlueTone-AS

OrganisationBlueTone-MNT

Country –

RIRRIPE NCC

Allocated20.09.2002

Abuse contactabuse@bluetone.cz

Network Overview

IPv4 Prefixes5

IPv6 Prefixes2

Upstreams (Transit)16

Downstreams (Customers)28

BGP Peers16

AS Path (BGP neighbours)

Upstreams (Transit)

AS1299Arelion (fka. Telia Carrier)AS14840BR.DIGITAL AS174Cogent Communications, LLC AS1764Next Layer Telecommunications AS20562Open Peering (Broadband Hosting B.V.)AS22356Durand do Brasil Ltda+10

AS25248BlueTone-AS

Downstreams (Customers)

AS11521ModusLink Corporation AS196762ALKOM Security, a.s.AS196822SELECT SYSTEM, s.r.o.AS199600Virtis s.r.o.AS200871RockawayX Infra s.r.o.AS201594Czech Telecommunication Office+22

Upstreams (Transit) (16)

AS1299Arelion (fka. Telia Carrier)

AS14840BR.DIGITAL

AS174Cogent Communications, LLC

AS1764Next Layer Telecommunications

AS20562Open Peering (Broadband Hosting B.V.)

AS22356Durand do Brasil Ltda

AS264409Huge Networks

AS31230SIX.SK Route Servers

AS33891Core-Backbone GmbH

AS50629LWLcom GmbH

AS6204INTERKVM HOST SRL

AS6461Zayo Bandwidth

Downstreams (Customers) (28)

AS11521ModusLink Corporation

AS196762ALKOM Security, a.s.

AS196822SELECT SYSTEM, s.r.o.

AS199600Virtis s.r.o.

AS200871RockawayX Infra s.r.o.

AS201594Czech Telecommunication Office

AS202073Itego a.s.

AS202556Blond & Brown s.r.o.

AS204351NAM system, a.s.

AS204405Durnet.cz sro

AS205724T.S.BOHEMIA a.s.

AS206438MX-NET Telekomunikace s.r.o.

IPv4 Prefixes (5)

212.158.128.0/19

85.207.0.0/16

193.32.56.0/24

84.244.64.0/18

82.99.128.0/18

IPv6 Prefixes (2)

2001:67c:2100::/48

2a02:a40::/32

BGP Peers (16)

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

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.