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

AS109

ASN

ARIN

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS109

NameCISCOSYSTEMS

OrganisationCISCO SYSTEMS, INC.

Country –

RIRARIN

Allocated06.05.1987

Network Overview

IPv4 Prefixes93

IPv6 Prefixes44

Upstreams (Transit)19

Downstreams (Customers)0

BGP Peers0

AS Path (BGP neighbours)

Upstreams (Transit)

AS1221Telstra Limited AS1299Arelion (fka. Telia Carrier)AS1680Cellcom Fixed Line Communication L.P AS17621China Unicom Shanghai network AS2764AAPT Limited AS3356Lumen (Level 3)+13

AS109CISCOSYSTEMS

Downstreams (Customers)

none

Upstreams (Transit) (19)

AS1221Telstra Limited

AS1299Arelion (fka. Telia Carrier)

AS1680Cellcom Fixed Line Communication L.P

AS17621China Unicom Shanghai network

AS2764AAPT Limited

AS3356Lumen (Level 3)

AS3491PCCW Global (HK) Ltd.

AS4637Telstra International Limited

AS4657StarHub Ltd

AS4755TATA Communications (formerly VSNL)

AS4812China Telecom Shanghai Province Network

AS5713Telkom SA Ltd.

IPv4 Prefixes (93)

64.103.40.0/21

192.133.224.0/20

103.60.32.0/22

128.107.14.0/23

173.37.0.0/20

173.38.128.0/17

173.37.145.0/24

64.103.0.0/16

128.107.0.0/23

128.107.8.0/23

173.39.200.0/23

64.102.249.0/24

64.104.128.0/19

64.103.64.0/19

173.37.160.0/19

72.163.240.0/23

128.107.2.0/23

173.39.64.0/19

128.107.38.0/23

12.159.148.0/22

72.163.96.0/19

12.19.88.0/21

128.107.54.0/23

198.135.0.0/21

64.101.0.0/18

72.163.248.0/22

111.223.8.0/22

173.39.0.0/18

128.107.6.0/23

64.104.192.0/18

161.44.0.0/16

64.104.64.0/19

128.107.22.0/23

72.163.224.0/19

173.37.16.0/20

128.107.24.0/23

64.104.160.0/19

128.107.20.0/23

198.133.219.0/24

173.39.152.0/21

216.128.32.0/19

128.107.0.0/16

173.37.64.0/18

173.39.160.0/19

128.107.18.0/23

173.39.96.0/19

171.68.0.0/14

173.38.0.0/17

72.163.64.0/20

64.103.96.0/20

64.103.0.0/17

64.104.206.0/23

192.135.250.0/24

12.5.186.0/23

64.101.192.0/19

64.104.204.0/23

64.101.224.0/19

72.163.0.0/16

64.104.124.0/24

204.69.198.0/23

173.37.128.0/19

72.163.80.0/20

72.163.128.0/18

173.39.192.0/20

72.163.7.0/24

192.133.240.0/22

64.103.128.0/17

64.101.128.0/18

173.36.0.0/17

128.107.4.0/23

128.107.40.0/23

173.39.128.0/19

128.107.12.0/23

64.101.96.0/19

64.104.0.0/18

72.163.4.0/24

64.100.0.0/16

192.118.76.0/22

64.104.0.0/16

72.163.0.0/18

64.101.64.0/18

192.133.192.0/19

72.163.192.0/19

64.102.0.0/16

144.254.0.0/16

64.103.48.0/21

64.104.96.0/19

173.36.0.0/14

173.39.144.0/21

204.69.200.0/24

66.187.208.0/20

128.107.10.0/23

173.37.192.0/18

IPv6 Prefixes (44)

2001:420:8f::/48

2001:420:88::/48

2001:420:4000::/40

2001:420:c0ec::/46

2001:420::/32

2001:420:c0f8::/46

2001:420:5e00::/39

2001:420:8a::/48

2001:420:92::/48

2001:420:5000::/39

2001:420:c110::/45

2001:420:c0d4::/46

2001:420:c0d8::/46

2001:420:5400::/39

2001:420:5200::/39

2001:420:1000::/40

2001:420:1100::/41

2001:420:5c00::/39

2001:420:2000::/35

2001:420:c130::/46

2001:420:c0e0::/46

2001:420:c128::/47

2001:420:93::/48

2001:420:8c::/48

2001:420:8e::/48

2001:420:4480::/45

2001:420:91::/48

2001:420:4000::/36

2001:420:c0c4::/46

2001:420:5a00::/39

2001:420:c0dc::/46

2001:420:c134::/46

2001:420:c0d0::/46

2001:420:5600::/39

2001:420:c138::/46

2001:420:1180::/41

2001:420:5800::/39

2001:420:8d::/48

2001:420:89::/48

2001:420:1200::/41

2001:420:5500::/40

2001:420:c0c0::/46

2001:420:c0cc::/46

2001:420:8b::/48

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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.