AS/BGP Report -> United States -> as103

book Summary for as103

The Autonomous System (AS) number 103 is assigned to Northwestern University. AS103 is assigned on 1987-04-09 by the Regional Internet Registry arin. The country of registration is United States. At least 136 domains are hosted on AS103. Examples of domains are northwestern.edu and healthmeasures.net. At least 2 name servers are hosted on AS103. Examples of name servers are accuvax.northwestern.edu and cicada-old.northwestern.edu. There are 22 IPv4 prefixes announced by AS103. Examples of prefixes are and There is one IPv6 prefix announced by AS103. This prefix is 2620:10d:2000::/41.

book General Information

AS number103 (AS103 / ASN103)
OrganizationNorthwestern University
CountryUnited States (US) us flag
Allocation date1987-04-09 by ARIN
Number of IPv4 addresses150,016
ASRank (based on number of IPs)1,349
Number of IP prefixes22 (IPv4) 1 (IPv6)
AS has bogon prefixesNo
Number of peers6 (IPv4) 3 (IPv6)

trending_up Hosting Summary

Number of domains hosted136
Number of adult domains hosted0
Number of name servers hosted2
Number of SPAM hosts hosted0
Number of open proxies hosted0
Number of mail servers hosted11
Number of IDN domains hosted0
Number of domains in Alexa top million2

import_export IP Prefixes and Peers

2620:10d:2000::/41US us flagNorthwestern University

Peer V4CountryDescription
2381US us flagWiscNet
3356US us flagLevel 3 Parent, LLC
174US us flagCogent Communications
22335US us flagMetropolitan Research and Education Network
11164US us flagInternet2
293US us flagESnet

Peer V6CountryDescription
2381US us flagWiscNet
3356US us flagLevel 3 Parent, LLC
22335US us flagMetropolitan Research and Education Network

Number of prefixes and peers for the last 360 days.


dns Hosting Details

Name ServerIPv4#Domains on this name server

timeline History Graphs

Number of domains, mail and name server hosted in the past on this AS.

Hosting history of domains break down by Top Level Domain (TLD) category.

AS Ranking history based on number of IPv4 addresses.


business Whois Information

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flag Country Information

CountryUnited States us flag
Area9,629,091 km²
Map of country us

announcement About this Report

The AS/BGP Report is calculated for every allocated AS number. The report is updated on a weekly basis, last updated on 2022-11-20.

The underlying DNS data is updated every 3 weeks, the Whois data is cached for about one month.

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