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

AS24255

ASN

APNIC

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS24255

NameT-CATV

Country

RIRAPNIC

Abuse contacthostmaster@nic.ad.jp

Network Overview

IPv4 Prefixes7

IPv6 Prefixes1

Upstreams (Transit)8

Downstreams (Customers)0

BGP Peers13

AS Path (BGP neighbours)

Upstreams (Transit)

AS17534NSK Co.,Ltd.AS17676SoftBank Corp.AS20485TransTeleCom JSC AS2497Internet Initiative Japan Inc.AS2518BIGLOBE Inc.AS6939Hurricane Electric LLC+2

AS24255T-CATV

Downstreams (Customers)

none

Upstreams (Transit) (8)

AS17534NSK Co.,Ltd.

AS17676SoftBank Corp.

AS20485TransTeleCom JSC

AS2497Internet Initiative Japan Inc.

AS2518BIGLOBE Inc.

AS6939Hurricane Electric LLC

AS8966Etisalat (E&)

AS9824JCOM Co., Ltd.

IPv4 Prefixes (7)

202.127.80.0/20

103.198.212.0/22

219.100.184.0/22

64.33.0.0/18

202.88.192.0/21

61.245.112.0/21

182.50.164.0/22

IPv6 Prefixes (1)

2405:5300::/32

BGP Peers (13)

AS17639Converge ICT Solutions Inc.

AS18106Viewqwest Pte Ltd

AS1828PacketFabric / Unitas Global

AS24482SG.GS

AS2500WIDE Project

AS25152RIPE NCC - K-root

AS35280F5 Networks SARL

AS36236NetActuate, Inc

AS45489Sri Lanka Telecom PLC

AS4777Asia Pacific Network Information Centre

AS49544i3D.net B.V

AS59105Home NOC Operators Group

AS9002

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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.