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

AS24641

ASN

RIPE NCC

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS24641

NameFASTER-AS

OrganisationFASTER-MNT

Country –

RIRRIPE NCC

Allocated01.02.2002

Abuse contactabuse@faster.cz

Network Overview

IPv4 Prefixes10

IPv6 Prefixes2

Upstreams (Transit)11

Downstreams (Customers)13

BGP Peers9

AS Path (BGP neighbours)

Upstreams (Transit)

AS14840BR.DIGITAL AS16019Vodafone Czech Republic a.s.AS1764Next Layer Telecommunications AS22356Durand do Brasil Ltda AS28725CETIN a.s.AS39392SH.cz s.r.o.+5

AS24641FASTER-AS

Downstreams (Customers)

AS199722Sberbank CZ, a.s. v likvidaci AS200844STUDENT AGENCY k.s.AS205234Brnenske komunikace a.s.AS205947NDC ICT Solutions s.r.o.AS212138Technicke site Brno, akciova spolecnost AS216021Stefan Johannes Mayer+7

Upstreams (Transit) (11)

AS14840BR.DIGITAL

AS16019Vodafone Czech Republic a.s.

AS1764Next Layer Telecommunications

AS22356Durand do Brasil Ltda

AS28725CETIN a.s.

AS39392SH.cz s.r.o.

AS4455IX Reach Ltd

AS6204INTERKVM HOST SRL

AS6663Türk Telekom International

AS6939Hurricane Electric LLC

AS8218Zayo Europe

Downstreams (Customers) (13)

AS199722Sberbank CZ, a.s. v likvidaci

AS200844STUDENT AGENCY k.s.

AS205234Brnenske komunikace a.s.

AS205947NDC ICT Solutions s.r.o.

AS212138Technicke site Brno, akciova spolecnost

AS216021Stefan Johannes Mayer

AS216258EOX IT Services GmbH

AS34049H-data, spol. s r.o.

AS35613FASTER CZ spol. s r.o.

AS49580Monet +, a.s.

AS51134Development 777 s.r.o.

AS51521Resident Control Telco s.r.o.

AS51876

IPv4 Prefixes (10)

91.224.48.0/23

185.50.228.0/22

85.132.153.0/24

81.19.0.0/20

95.129.96.0/21

91.196.40.0/22

185.146.4.0/22

85.132.144.0/20

77.240.176.0/20

77.240.176.0/24

IPv6 Prefixes (2)

2a01:ade0::/32

2a02:e98::/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.