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

AS5610

ASN

RIPE NCC

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS5610

NameO2-CZECH-REPUBLIC

OrganisationAS5610-MTN

Country –

RIRRIPE NCC

Allocated22.07.2002

Abuse contactabuse@o2.cz

Network Overview

IPv4 Prefixes67

IPv6 Prefixes5

Upstreams (Transit)23

Downstreams (Customers)42

BGP Peers9

AS Path (BGP neighbours)

Upstreams (Transit)

AS1299Arelion (fka. Telia Carrier)AS14840BR.DIGITAL AS15935ha-vel internet s.r.o.AS16246O2 Czech Republic, a.s.AS174Cogent Communications, LLC AS1764Next Layer Telecommunications+17

AS5610O2-CZECH-REPUBLIC

Downstreams (Customers)

AS13105INFORM LLC AS15380Air Navigation Services of the Czech Republic, state enterprise AS16019Vodafone Czech Republic a.s.AS16246O2 Czech Republic, a.s.AS197353NN Management Services, s.r.o.AS197920SKODA ICT s.r.o.+36

Upstreams (Transit) (23)

AS1299Arelion (fka. Telia Carrier)

AS14840BR.DIGITAL

AS15935ha-vel internet s.r.o.

AS16246O2 Czech Republic, a.s.

AS174Cogent Communications, LLC

AS1764Next Layer Telecommunications

AS199490INTERCONNECT s.r.o.

AS21215UNITED GROUP NETWORK INFRASTRUCTURE d.o.o. Beograd

AS22356Durand do Brasil Ltda

AS263444Open X Tecnologia Ltda

AS264409Huge Networks

AS2852CESNET z.s.p.o.

Downstreams (Customers) (42)

AS13105INFORM LLC

AS15380Air Navigation Services of the Czech Republic, state enterprise

AS16019Vodafone Czech Republic a.s.

AS16246O2 Czech Republic, a.s.

AS197353NN Management Services, s.r.o.

AS197920SKODA ICT s.r.o.

AS198282CAH Building s.r.o.

AS198605AVAST Software s.r.o.

AS198991TV Nova sro

AS199059Maurice Ward & Co., s.r.o.

AS201163Komercni banka, a.s.

AS203411FORTUNA GAME a.s.

IPv4 Prefixes (67)

85.70.0.0/16

185.61.228.0/22

81.90.168.0/21

83.208.220.0/22

90.182.108.0/24

83.208.64.0/18

90.181.0.0/16

85.70.0.0/15

185.143.112.0/22

217.117.208.0/20

195.5.186.0/24

194.50.248.0/23

194.228.128.0/17

85.160.0.0/15

109.81.112.0/20

193.84.12.0/22

80.188.128.0/17

83.208.0.0/16

85.71.224.0/19

90.176.128.0/17

80.188.222.0/24

161.195.144.0/24

37.188.128.0/17

92.243.192.0/19

194.228.0.0/17

85.70.128.0/17

80.188.40.0/24

193.17.13.0/24

88.102.0.0/16

91.232.82.0/24

85.70.0.0/17

90.177.0.0/16

193.84.12.0/23

194.165.47.0/24

217.194.160.0/20

90.183.0.0/16

85.71.0.0/16

5.23.39.0/24

88.83.175.0/24

88.83.160.0/19

80.188.0.0/16

83.69.32.0/19

90.182.0.0/16

90.176.32.0/19

88.100.0.0/14

81.90.168.0/24

160.218.0.0/16

90.180.0.0/14

81.90.170.0/24

91.191.64.0/18

109.80.0.0/15

194.228.72.0/22

80.188.0.0/17

109.81.160.0/20

85.193.0.0/18

91.213.10.0/24

193.84.14.0/23

81.90.173.0/24

83.208.128.0/19

194.228.0.0/16

81.90.160.0/20

90.176.170.0/24

88.100.0.0/15

90.178.0.0/15

90.176.64.0/18

83.208.0.0/18

91.193.132.0/22

IPv6 Prefixes (5)

2a00:1028::/32

2a02:9b8::/31

2a00:1028::/29

2001:67c:dd4::/48

2001:41d8::/32

BGP Peers (9)

AS198150SIACOM JSC

AS202297Skylon Solutions Limited

AS212483LEVEL EIGHTY-SIX COMMUNICATIONS LTD

AS24482SG.GS

AS29504Freenet Liberec, z.s.

AS36236NetActuate, Inc

AS40994Alwyzon (Hohl IT)

AS49544i3D.net B.V

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.