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

AS1237

ASN

APNIC

RIR

212

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS1237

NameKREONET-AS-KR-KR

Country

RIRAPNIC

Abuse contacthostmaster@nic.or.kr

Network Overview

IPv4 Prefixes212

IPv6 Prefixes1

Upstreams (Transit)4

Downstreams (Customers)43

BGP Peers0

AS Path (BGP neighbours)

Upstreams (Transit)

AS17579KISTI AS399861Mobite Network LLC AS4766Korea Telecom AS9318SK Broadband Co Ltd

AS1237KREONET-AS-KR-KR

Downstreams (Customers)

AS10052Kyungpook National University AS10063Korea Meteorological Administration AS10070KRISS Sub DAEJON AS10162Seoul National University Hospital AS10187Korea Information Society Developement Institute AS131795KOREA INSTITUTE OF ENERGY RESEARCH+37

Upstreams (Transit) (4)

AS17579KISTI

AS399861Mobite Network LLC

AS4766Korea Telecom

AS9318SK Broadband Co Ltd

Downstreams (Customers) (43)

AS10052Kyungpook National University

AS10063Korea Meteorological Administration

AS10070KRISS Sub DAEJON

AS10162Seoul National University Hospital

AS10187Korea Information Society Developement Institute

AS131795KOREA INSTITUTE OF ENERGY RESEARCH

AS131830Institute for Basic Science

AS131869University of Science and Technology

AS152212Korea Institute of Science and Technology Evaluation and Planning

AS152671SPARCS

AS1704Korea Advanced Institute of Science and Technology

AS17579KISTI

IPv4 Prefixes (212)

203.241.118.0/24

210.114.108.0/24

203.253.96.0/20

210.125.64.0/21

210.219.34.0/23

203.250.172.0/22

203.247.176.0/22

210.119.116.0/24

203.250.112.0/21

203.253.230.0/23

210.119.126.0/24

203.233.155.0/24

210.125.0.0/24

210.119.40.0/21

210.110.189.0/24

203.250.156.0/24

210.114.104.0/23

203.253.135.0/24

203.253.226.0/24

210.117.219.0/24

210.98.28.0/22

203.241.170.0/23

210.219.36.0/22

210.117.248.0/22

210.110.205.0/24

203.253.234.0/23

203.250.192.0/18

210.117.228.0/23

203.250.160.0/21

210.219.56.0/21

210.117.218.0/24

210.110.254.0/23

203.250.155.0/24

210.117.212.0/24

202.30.60.0/22

210.98.48.0/21

203.253.236.0/24

210.218.208.0/21

210.218.203.0/24

210.110.144.0/20

150.183.11.0/24

210.107.248.0/22

210.119.37.0/24

203.250.0.0/19

210.98.59.0/24

147.47.124.0/24

203.230.73.0/24

147.47.120.0/21

210.125.56.0/21

210.119.114.0/23

210.119.71.0/24

203.254.168.0/23

210.125.69.0/24

210.119.20.0/23

203.241.174.0/24

210.110.191.0/24

203.230.0.0/24

203.253.238.0/24

203.254.40.0/24

203.247.172.0/22

210.117.230.0/24

210.218.202.0/23

203.253.136.0/22

218.234.156.0/24

203.247.216.0/22

210.110.128.0/21

210.110.235.0/24

203.230.72.0/24

203.247.184.0/24

210.110.252.0/24

210.98.48.0/24

210.117.217.0/24

210.117.214.0/23

210.117.194.0/24

210.117.224.0/24

210.219.45.0/24

134.75.250.0/24

203.230.116.0/24

203.233.156.0/24

210.218.206.0/23

210.98.52.0/24

150.183.0.0/16

203.241.116.0/23

210.117.236.0/24

203.254.176.0/20

203.250.156.0/22

210.98.56.0/24

210.117.225.0/24

210.119.48.0/20

203.247.69.0/24

203.230.7.0/24

210.117.238.0/23

203.247.167.0/24

203.241.165.0/24

210.98.60.0/22

210.219.52.0/24

210.119.36.0/23

210.110.183.0/24

210.125.107.0/24

210.117.197.0/24

210.218.204.0/23

210.119.96.0/22

210.117.209.0/24

210.119.113.0/24

210.98.5.0/24

203.250.182.0/24

203.230.126.0/24

203.254.185.0/24

210.110.192.0/22

210.98.8.0/22

210.117.211.0/24

203.230.6.0/24

203.241.169.0/24

210.107.152.0/21

210.107.146.0/24

203.230.60.0/22

210.110.198.0/24

210.117.240.0/21

210.117.216.0/24

210.219.55.0/24

134.75.52.0/23

203.230.24.0/21

210.219.48.0/22

203.241.40.0/21

210.98.47.0/24

203.247.190.0/23

203.230.76.0/22

210.119.72.0/24

210.117.193.0/24

203.254.179.0/24

203.247.187.0/24

210.117.198.0/24

210.110.143.0/24

210.110.190.0/24

203.247.73.0/24

210.110.236.0/22

210.107.144.0/24

210.125.84.0/23

210.119.124.0/23

210.218.192.0/24

203.230.74.0/23

203.250.96.0/21

210.119.100.0/23

210.117.226.0/23

210.218.201.0/24

203.254.186.0/24

210.219.42.0/24

203.230.2.0/24

203.250.110.0/24

210.219.62.0/23

210.98.12.0/24

218.233.7.0/24

210.98.26.0/24

203.247.180.0/23

203.241.120.0/22

210.110.196.0/23

203.247.185.0/24

210.219.47.0/24

203.254.180.0/24

203.230.116.0/23

210.119.64.0/19

203.247.64.0/24

210.117.208.0/24

210.219.32.0/24

210.110.206.0/23

210.117.192.0/24

210.98.6.0/23

203.247.160.0/22

147.47.125.0/24

203.254.175.0/24

202.31.182.0/24

210.119.122.0/23

210.117.252.0/23

203.253.140.0/22

203.250.176.0/21

210.110.232.0/24

210.107.160.0/20

210.98.24.0/23

203.247.170.0/23

203.230.64.0/21

203.230.3.0/24

203.247.164.0/23

203.230.16.0/23

203.247.188.0/24

210.117.210.0/23

203.254.181.0/24

203.247.192.0/20

210.107.252.0/23

210.98.54.0/24

203.230.22.0/23

210.219.62.0/24

203.230.108.0/22

211.213.190.0/24

203.241.172.0/23

203.241.164.0/24

203.230.120.0/24

210.110.184.0/24

203.253.224.0/23

210.110.182.0/24

210.110.224.0/21

210.107.254.0/24

203.230.8.0/22

210.98.44.0/24

134.75.0.0/16

210.219.40.0/23

210.125.32.0/20

210.114.106.0/24

203.250.183.0/24

134.75.20.0/24

210.218.216.0/22

202.30.40.0/22

210.98.14.0/23

IPv6 Prefixes (1)

2001:320::/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.