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

AS13855

ASN

ARIN

RIR

IPv4 Prefixes

IPv6 Prefixes

AS Information

ASNAS13855

NameCFU-NET

OrganisationThe Municipal Communications Utility of the City of Cedar Falls, Iowa

Country –

RIRARIN

Allocated27.08.1999

Network Overview

IPv4 Prefixes10

IPv6 Prefixes1

Upstreams (Transit)5

Downstreams (Customers)12

BGP Peers6

AS Path (BGP neighbours)

Upstreams (Transit)

AS1299Arelion (fka. Telia Carrier)AS137409GSL Networks Pty LTD AS174Cogent Communications, LLC AS6122Iowa Communications Network AS6939Hurricane Electric LLC

AS13855CFU-NET

Downstreams (Customers)

AS17313THE CBE GROUP, INC AS18827Forbin AS20298Waverly Utilities AS22594University of Northern Iowa AS33029Osage Municipal Communications Utility AS36061Waterloo Fiber+6

Upstreams (Transit) (5)

AS1299Arelion (fka. Telia Carrier)

AS137409GSL Networks Pty LTD

AS174Cogent Communications, LLC

AS6122Iowa Communications Network

AS6939Hurricane Electric LLC

Downstreams (Customers) (12)

AS17313THE CBE GROUP, INC

AS18827Forbin

AS20298Waverly Utilities

AS22594University of Northern Iowa

AS33029Osage Municipal Communications Utility

AS36061Waterloo Fiber

AS393514New Hampton Municipal Light Plant

AS397790Indianola Municipal Utilities

AS400080Grundy Center Municipal Utilities

AS400132Reinbeck Telecommunications Utility

AS400358TOTALDATALOSS LLC

AS400528City of Pella

IPv4 Prefixes (10)

168.203.8.0/22

67.212.96.0/19

64.191.8.0/22

192.101.160.0/24

142.147.101.0/24

209.40.80.0/22

192.111.20.0/22

24.149.0.0/19

69.57.192.0/20

199.168.104.0/22

IPv6 Prefixes (1)

2607:f070::/32

BGP Peers (6)

AS1828PacketFabric / Unitas Global

AS24482SG.GS

AS35280F5 Networks SARL

AS36236NetActuate, Inc

AS394414E2W Solutions LLC

AS49544i3D.net B.V

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.