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

AS16246

ASN

RIPE NCC

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS16246

NameAS16246

OrganisationAS5610-MTN

Country –

RIRRIPE NCC

Allocated21.10.2003

Abuse contactabuse@o2.cz

Network Overview

IPv4 Prefixes13

IPv6 Prefixes2

Upstreams (Transit)3

Downstreams (Customers)14

BGP Peers0

AS Path (BGP neighbours)

Upstreams (Transit)

AS12570O2 Czech Republic, a.s.AS5610O2 Czech Republic, a.s.AS62178MASTER IT Technologies, a.s.

AS16246AS16246

Downstreams (Customers)

AS12570O2 Czech Republic, a.s.AS197197CETIN a.s.AS202657Pavel Jochim AS207015Position s.r.o.AS212315Frantisek Toman AS29321O2 Czech Republic, a.s.+8

Upstreams (Transit) (3)

AS12570O2 Czech Republic, a.s.

AS5610O2 Czech Republic, a.s.

AS62178MASTER IT Technologies, a.s.

Downstreams (Customers) (14)

AS12570O2 Czech Republic, a.s.

AS197197CETIN a.s.

AS202657Pavel Jochim

AS207015Position s.r.o.

AS212315Frantisek Toman

AS29321O2 Czech Republic, a.s.

AS31246O2 Czech Republic, a.s.

AS39736ICT Support, s.r.o.

AS41046O2 Czech Republic, a.s.

AS44070O2 Czech Republic, a.s.

AS47681O2 Czech Republic, a.s.

AS49767O2 Czech Republic, a.s.

AS5610O2 Czech Republic, a.s.

AS62178MASTER IT Technologies, a.s.

IPv4 Prefixes (13)

91.197.116.0/22

213.180.32.0/19

178.17.96.0/20

188.175.0.0/16

86.63.192.0/19

185.15.252.0/22

92.240.160.0/19

78.108.152.0/21

77.87.232.0/21

94.74.192.0/18

95.143.128.0/20

82.150.160.0/19

176.98.96.0/20

IPv6 Prefixes (2)

2a02:350::/29

2a03:b4c0::/32

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.