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

AS7670

ASN

APNIC

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS7670

NameCTNET

Country

RIRAPNIC

Network Overview

IPv4 Prefixes19

IPv6 Prefixes1

Upstreams (Transit)11

Downstreams (Customers)18

BGP Peers10

AS Path (BGP neighbours)

Upstreams (Transit)

AS137409GSL Networks Pty LTD AS17686ACCELIA AS2497Internet Initiative Japan Inc.AS2516KDDI Corporation AS2518BIGLOBE Inc.AS2519ARTERIA Networks Corporation+5

AS7670CTNET

Downstreams (Customers)

AS131907Iwami Cablevision Co.,Ltd.AS131928Tottori Teletopia Co., Ltd.AS146976Kvision Co.,Ltd.AS17691NDS Co., Ltd.AS18077Yamaguchi Cable Vision Co.,Ltd AS18124Okayama University of Science+12

Upstreams (Transit) (11)

AS137409GSL Networks Pty LTD

AS17686ACCELIA

AS2497Internet Initiative Japan Inc.

AS2516KDDI Corporation

AS2518BIGLOBE Inc.

AS2519ARTERIA Networks Corporation

AS2914NTT America, Inc.

AS4637Telstra International Limited

AS6939Hurricane Electric LLC

AS7473Singapore Telecommunications Ltd

AS8220COLT

Downstreams (Customers) (18)

AS131907Iwami Cablevision Co.,Ltd.

AS131928Tottori Teletopia Co., Ltd.

AS146976Kvision Co.,Ltd.

AS17691NDS Co., Ltd.

AS18077Yamaguchi Cable Vision Co.,Ltd

AS18124Okayama University of Science

AS18144Enecom,Inc.

AS18272Benesse Corporation

AS23618Ibara Broadcasting Company

AS23775Tamashima TV Inc.

AS23786San-in Cable Vision CO.,LTD

AS24251Iwakuni Cable Network Corporation

IPv4 Prefixes (19)

103.152.230.0/23

202.25.192.0/20

61.122.0.0/22

103.39.192.0/22

202.246.244.0/22

219.118.32.0/20

210.253.32.0/19

121.58.176.0/21

210.236.0.0/19

210.166.32.0/19

61.125.160.0/20

61.213.240.0/20

27.96.68.0/22

210.235.32.0/22

133.117.96.0/21

160.192.0.0/16

211.12.224.0/19

211.1.128.0/19

202.86.120.0/21

IPv6 Prefixes (1)

2001:2a8::/32

BGP Peers (10)

AS14907Wikimedia Foundation Inc.

AS17639Converge ICT Solutions Inc.

AS199524Gcore S.A.

AS24482SG.GS

AS25152RIPE NCC - K-root

AS35280F5 Networks SARL

AS36236NetActuate, Inc

AS45489Sri Lanka Telecom PLC

AS49544i3D.net B.V

AS9002RETN Limited

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.