Autonomous System details

AS104

University of Colorado at Boulder  ·  colorado.edu

United States

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AS104 – University of Colorado at Boulder

Field Value
Country United States
Website colorado.edu
Hosted domains 78
IPv4 addresses 91,136
IPv6 addresses 79,229,371,440,083,952,629,200,000,000
ASN type Education
Registry arin
Allocated 39 years ago on Apr 09, 1987
Updated 7 years ago on Jun 25, 2019

IP Ranges

Netblock Company Num of IPs
128.138.0.0/16 University of Colorado 65,536
129.19.192.0/18 University of Colorado Boulder 16,384
198.11.16.0/20 University of Colorado Boulder 4,096
146.5.20.0/22 National Solar Observatory 1,024
192.12.238.0/24 University of Colorado 256
192.12.240.0/24 University of Colorado 256
192.12.241.0/24 University of Colorado 256
192.12.242.0/24 University of Colorado 256
192.12.244.0/24 University of Colorado 256
192.12.245.0/24 University of Colorado 256
198.59.7.0/24 University of Colorado Boulder 256
198.59.51.0/24 University of Colorado Boulder 256
198.59.52.0/24 University of Colorado Boulder 256
198.59.54.0/24 University of Colorado Boulder 256
198.59.55.0/24 University of Colorado Boulder 256
198.59.70.0/24 University of Colorado Boulder 256
198.59.81.0/24 University of Colorado Boulder 256
198.59.82.0/24 University of Colorado Boulder 256
198.59.83.0/24 University of Colorado Boulder 256
204.228.80.0/24 University of Colorado Boulder 256

Netblock Company
2620:18f::/32 University of Colorado Boulder
2001:468:501::/48 University Corporation for Atmospheric Research
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WHOIS Details

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                                                ASHandle:       AS104
                                                OrgID:          AS104
                                                ASName:         AS104
                                                ASNumber:       AS104
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA
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Hosted Domains

There are 78 domain names hosted across 36 IP addresses on this ASN.

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IP Address Domain Domains on this IP
128.138.68.45 ██████████ 13
128.138.135.43 █████████ 9
128.138.136.14 ██████████ 9
128.138.136.36 ██████████ 4
128.138.29.28 ██████████ 3
128.138.93.186 ██████████ 2
128.138.97.77 █████████ 2
128.138.67.195 ██████████ 2
128.138.70.66 ██████████ 2
128.138.136.96 ██████████ 2

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Peers

There are 2 peers for this ASN.

Peers Name
AS14041 University Corporation for Atmospheric Research
AS3356 Level 3 Parent, LLC
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ASN API & Database

Upstreams

There are 2 upstreams for this ASN.

upstreams Name
AS14041 University Corporation for Atmospheric Research
AS3356 Level 3 Parent, LLC
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ASN API & Database

Downstreams

There are no downstreams for this ASN.

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ASN API & Database

Pingable IPs

19 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
192.12.244.18 AS104 University of Colorado at Boulder 1.21ms from Denver, US
146.5.23.212 AS104 University of Colorado at Boulder 1.23ms from Denver, US
2620:18f:30:1000::2 AS104 University of Colorado at Boulder 1.25ms from Denver, US
128.138.141.162 AS104 University of Colorado at Boulder 2.06ms from Denver, US
146.5.20.81 AS104 University of Colorado at Boulder 1.79ms from Denver, US
192.12.242.1 AS104 University of Colorado at Boulder 1.30ms from Denver, US
128.138.232.79 AS104 University of Colorado at Boulder 1.73ms from Denver, US
128.138.138.121 AS104 University of Colorado at Boulder 1.99ms from Denver, US
2620:18f:0:10a0::1 AS104 University of Colorado at Boulder 0.54ms from Denver, US
198.59.51.5 AS104 University of Colorado at Boulder 1.84ms from Denver, US
128.138.213.15 AS104 University of Colorado at Boulder 2.22ms from Denver, US
128.138.131.26 AS104 University of Colorado at Boulder 2.18ms from Denver, US
198.59.55.10 AS104 University of Colorado at Boulder 0.57ms from Denver, US
128.138.81.254 AS104 University of Colorado at Boulder 1.36ms from Denver, US
192.12.238.153 AS104 University of Colorado at Boulder 1.20ms from Denver, US
128.138.82.253 AS104 University of Colorado at Boulder 1.36ms from Denver, US
192.12.245.119 AS104 University of Colorado at Boulder 1.20ms from Denver, US
198.59.7.21 AS104 University of Colorado at Boulder 1.73ms from Denver, US
192.12.240.33 AS104 University of Colorado at Boulder 1.26ms from Denver, US

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address ASN Details
62.74.246.72 AS3329 Vodafone-panafon Hellenic Telecommunications Company SA 1.24ms from Athens, GR
223.229.246.216 AS24560 Bharti Airtel Ltd., Telemedia Services 9.36ms from Delhi, IN
98.55.33.8 AS7922 Comcast Cable Communications, LLC 4.86ms from Denver, US
73.162.64.120 AS7922 Comcast Cable Communications, LLC 5.20ms from Fremont, US
82.181.103.8 AS16086 DNA Oyj 5.10ms from Helsinki, FI
123.48.182.216 AS18126 Chubu Telecommunications Company, Inc. 7.34ms from Osaka, JP
191.12.99.72 AS26599 TELEFÔNICA BRASIL S.A 17.38ms from Rio de Janeiro, BR
176.109.26.8 AS43434 CJSC Contact TV 8.60ms from Samara, RU
177.53.193.56 AS53020 IDT Brasil Telecomunicações Ltda. 0.29ms from Sao Paulo, BR
119.15.71.184 AS23854 NINE ENTERTAINMENT CO. PTY LTD 0.25ms from Sydney, AU
24.226.22.152 AS7992 Cogeco Connexion Inc. 0.81ms from Toronto, CA
37.26.35.216 AS39232 Uninet LLC 1.32ms from Baku, AZ
223.205.23.168 AS45758 Triple T Broadband Public Company Limited 3.73ms from Bangkok, TH
206.1.31.136 AS18229 CtrlS 0.26ms from Bengaluru, IN
24.56.144.40 AS11232 Midcontinent Communications 0.52ms from Denver, US
84.163.201.136 AS3320 Deutsche Telekom AG 4.51ms from Frankfurt am Main, DE
104.89.105.56 AS16625 Akamai Technologies, Inc. 0.49ms from Hong Kong, HK
125.141.224.184 AS4766 Korea Telecom 0.96ms from Incheon, KR
211.201.18.184 AS9318 SK Broadband Co Ltd 1.08ms from Incheon, KR
148.197.6.8 AS786 Jisc Services Limited 4.41ms from London, GB
79.54.43.88 AS3269 Telecom Italia S.p.A. 3.28ms from Milan, IT
101.140.24.104 AS17511 OPTAGE Inc. 2.32ms from Osaka, JP
176.163.186.104 AS5410 Bouygues Telecom SA 1.59ms from Paris, FR
112.245.99.248 AS4837 CHINA UNICOM China169 Backbone 5.06ms from Qingdao, CN
52.52.27.88 AS16509 Amazon.com, Inc. 0.15ms from San Jose, US

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this ASN. Learn more.

$
traceroute -a -n -q1 -f2 128.138.239.13
traceroute to 128.138.239.13 (128.138.239.13): 64 hops max, 52 byte packets
2 [AS20278] 64.44.81.177 0.122 ms
3 *
5 [AS104] 198.59.55.9 1.525 ms
6 [AS104] 128.138.81.194 2.344 ms
7 [AS104] 128.138.81.249 1.698 ms
8 [AS104] 128.138.81.11 1.912 ms
9 [AS104] 128.138.82.11 2.115 ms
10 [AS104] 128.138.239.13 1.891 ms
Measurement taken from IPinfo ProbeNet in Denver, US
On

Related Networks

What is an ASN?

Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.

The ASN details will often correspond to the IP address owner, but for smaller organizations it may be that organization's parent, or their ISP. Find out more about AS104 at robtex.

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