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

AS12570

ASN

RIPE NCC

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS12570

NameITSELF

OrganisationAS5610-MTN

Country –

RIRRIPE NCC

Allocated27.05.2002

Abuse contactabuse@o2.cz

Network Overview

IPv4 Prefixes11

IPv6 Prefixes2

Upstreams (Transit)2

Downstreams (Customers)10

BGP Peers0

AS Path (BGP neighbours)

Upstreams (Transit)

AS16246O2 Czech Republic, a.s.AS47232ISP Alliance a.s.

AS12570ITSELF

Downstreams (Customers)

AS16246O2 Czech Republic, a.s.AS196815LAN servis s.r.o.AS197798Net-Connect s.r.o.AS198620Bralu Jurjanu biedriba AS202979NGA Services, spol. s r.o.AS204886Metropolitni sit Humpolec spol. s r.o.+4

Upstreams (Transit) (2)

AS16246O2 Czech Republic, a.s.

AS47232ISP Alliance a.s.

Downstreams (Customers) (10)

AS16246O2 Czech Republic, a.s.

AS196815LAN servis s.r.o.

AS197798Net-Connect s.r.o.

AS198620Bralu Jurjanu biedriba

AS202979NGA Services, spol. s r.o.

AS204886Metropolitni sit Humpolec spol. s r.o.

AS211334MASTER IT Technologies, a.s.

AS213354INTERNATIONAL HOSTING SOLUTIONS LLP

AS25192CZ.NIC, z.s.p.o.

AS51424Jiri Sperl

IPv4 Prefixes (11)

195.78.122.0/23

185.8.188.0/22

89.190.40.0/21

80.78.144.0/20

212.96.160.0/19

109.105.32.0/19

89.190.48.0/20

212.4.128.0/19

213.211.32.0/19

193.17.248.0/22

88.83.224.0/19

IPv6 Prefixes (2)

2a0b:bb41::/32

2001:4ba8::/29

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.