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

AS17511

ASN

APNIC

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS17511

NameOPTAGE

Country

RIRAPNIC

Network Overview

IPv4 Prefixes66

IPv6 Prefixes2

Upstreams (Transit)24

Downstreams (Customers)10

BGP Peers13

AS Path (BGP neighbours)

Upstreams (Transit)

AS12389Rostelecom PJSC AS137409GSL Networks Pty LTD AS15412Flag Telecom UK Limited AS174Cogent Communications, LLC AS24961WIIT AG (fka. myLoc Managed IT AG)AS2497Internet Initiative Japan Inc.+18

AS17511OPTAGE

Downstreams (Customers)

AS131924Kansai Airports AS151379OPTAGE Inc.AS24270CRC Solutions Corp.,AS24282KAGOYA JAPAN Inc.AS38633Value Core Inc.AS4711INTEC Inc.+4

Upstreams (Transit) (24)

AS12389Rostelecom PJSC

AS137409GSL Networks Pty LTD

AS15412Flag Telecom UK Limited

AS174Cogent Communications, LLC

AS24961WIIT AG (fka. myLoc Managed IT AG)

AS2497Internet Initiative Japan Inc.

AS2516KDDI Corporation

AS2518BIGLOBE Inc.

AS2914NTT America, Inc.

AS3356Lumen (Level 3)

AS3935131173 Services AB

AS4635HKIX Route Servers

Downstreams (Customers) (10)

AS131924Kansai Airports

AS151379OPTAGE Inc.

AS24270CRC Solutions Corp.,

AS24282KAGOYA JAPAN Inc.

AS38633Value Core Inc.

AS4711INTEC Inc.

AS59118NRI SecureTechnologies, Ltd.

AS59124KYOTO Prefectural Government

AS63402Universal Orlando

AS9358OPTAGE Inc.

IPv4 Prefixes (66)

218.45.96.0/20

203.140.64.0/19

202.8.48.0/20

202.26.228.0/24

101.140.0.0/14

121.80.0.0/14

61.205.80.0/20

59.190.0.0/16

60.57.128.0/17

180.144.0.0/14

218.228.128.0/17

119.228.0.0/14

202.34.12.0/23

203.175.80.0/20

103.65.208.0/22

61.213.128.0/20

160.233.0.0/16

219.122.128.0/17

58.70.0.0/16

192.51.144.0/21

219.122.32.0/19

182.164.0.0/14

103.84.124.0/22

58.188.0.0/14

61.205.96.0/20

218.251.0.0/17

103.95.206.0/24

219.100.52.0/22

61.122.240.0/20

103.112.180.0/22

103.116.152.0/22

103.142.132.0/23

210.199.80.0/20

103.97.236.0/22

60.56.0.0/16

202.34.10.0/23

61.195.96.0/19

202.216.48.0/20

103.199.132.0/22

61.205.0.0/20

202.19.159.0/24

60.57.0.0/17

128.22.0.0/16

158.198.0.0/16

202.26.231.0/24

218.42.192.0/18

58.189.176.0/20

103.124.200.0/22

202.244.138.0/23

202.62.253.0/24

138.248.64.0/22

61.205.112.0/20

150.66.0.0/16

121.84.0.0/14

202.26.230.0/24

202.223.48.0/22

103.99.124.0/22

103.97.232.0/22

112.68.0.0/14

219.75.128.0/17

202.26.229.0/24

160.25.92.0/23

150.57.0.0/16

128.27.0.0/16

202.60.32.0/20

122.100.24.0/21

IPv6 Prefixes (2)

2001:ce8:90::/44

2001:ce8::/32

BGP Peers (13)

AS12779IT.Gate S.p.A.

AS14907Wikimedia Foundation Inc.

AS18106Viewqwest Pte Ltd

AS199524Gcore S.A.

AS24482SG.GS

AS29140Hostserver GmbH

AS35280F5 Networks SARL

AS36236NetActuate, Inc

AS38001NewMedia Express Pte. Ltd.

AS49544i3D.net B.V

AS55720Gigabit Hosting Sdn Bhd

AS58952Frontiir Co. Ltd

AS8455

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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.