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 79,229,371,440,083,952,222,718,656,512
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 ██████████ 14
128.138.135.43 █████████ 11
128.138.136.14 █████████ 9
128.138.136.36 ██████████ 4
128.138.29.28 ██████████ 3
128.138.136.96 ██████████ 2
128.138.67.195 ██████████ 2
128.138.67.162 ██████████ 2
128.138.93.186 █████████ 2
128.138.93.14 ██████████ 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

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

IP Address ASN Details
128.138.92.52 AS104 University of Colorado at Boulder 1.65ms from Denver, US
128.138.239.13 AS104 University of Colorado at Boulder 2.42ms from Denver, US
192.12.245.119 AS104 University of Colorado at Boulder 1.21ms from Denver, US
128.138.152.79 AS104 University of Colorado at Boulder 1.90ms from Denver, US
128.138.67.162 AS104 University of Colorado at Boulder 1.62ms from Denver, US
198.59.70.210 AS104 University of Colorado at Boulder 2.06ms from Denver, US
2620:18f:30:1000::2 AS104 University of Colorado at Boulder 1.22ms from Denver, US
128.138.87.50 AS104 University of Colorado at Boulder 1.83ms from Denver, US
128.138.135.20 AS104 University of Colorado at Boulder 1.74ms from Denver, US
198.59.55.10 AS104 University of Colorado at Boulder 0.49ms from Denver, US
192.12.242.1 AS104 University of Colorado at Boulder 1.29ms from Denver, US
128.138.97.174 AS104 University of Colorado at Boulder 1.65ms from Denver, US
128.138.228.138 AS104 University of Colorado at Boulder 1.82ms from Denver, US
128.138.184.11 AS104 University of Colorado at Boulder 1.64ms from Denver, US
128.138.244.13 AS104 University of Colorado at Boulder 2.21ms from Denver, US
128.138.210.16 AS104 University of Colorado at Boulder 2.27ms from Denver, US
128.138.88.16 AS104 University of Colorado at Boulder 2.13ms from Denver, US
128.138.240.1 AS104 University of Colorado at Boulder 2.00ms from Denver, US
198.59.51.25 AS104 University of Colorado at Boulder 1.74ms from Denver, US
2620:18f:0:10a0::1 AS104 University of Colorado at Boulder 0.53ms from Denver, US
128.138.249.53 AS104 University of Colorado at Boulder 2.13ms from Denver, US
128.138.96.3 AS104 University of Colorado at Boulder 2.10ms from Denver, US
128.138.163.41 AS104 University of Colorado at Boulder 1.94ms from Denver, US
128.138.29.12 AS104 University of Colorado at Boulder 1.70ms from Denver, US
128.138.141.179 AS104 University of Colorado at Boulder 1.96ms 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
170.85.245.104 AS22616 ZSCALER, INC. 0.20ms from Ashburn, US
125.163.217.184 AS7713 PT Telekomunikasi Indonesia 1.85ms from Batam, ID
44.244.241.120 AS16509 Amazon.com, Inc. 0.16ms from Boardman, US
57.128.0.184 AS16276 OVH SAS 0.07ms from Gravelines, FR
98.194.152.40 AS7922 Comcast Cable Communications, LLC 5.98ms from Houston, US
103.203.90.8 AS150926 PT Gerbang Sinergi Prima 3.45ms from Jakarta, ID
86.154.222.152 AS2856 British Telecommunications PLC 6.26ms from London, GB
107.174.174.184 AS36352 HostPapa 0.33ms from Los Angeles, US
201.171.207.40 AS8151 UNINET 7.63ms from Los Angeles, US
47.104.137.136 AS37963 Hangzhou Alibaba Advertising Co.,Ltd. 0.25ms from Qingdao, CN
89.111.169.120 AS197695 Domain names registrar REG.RU, Ltd 0.82ms from Saint Petersburg, RU
1.224.50.24 AS9318 SK Broadband Co Ltd 1.62ms from Seoul, KR
111.253.33.72 AS3462 Data Communication Business Group 2.84ms from Taipei, TW
126.51.228.184 AS17676 SoftBank Corp. 2.73ms from Tokyo, JP
118.240.234.72 AS2527 Sony Network Communications Inc. 1.77ms from Tokyo, JP
144.41.15.184 AS553 BelWue-Koordination 3.54ms from Zuerich, CH
20.21.37.56 AS8075 Microsoft Corporation 0.22ms from Az Za`ayin, QA
120.1.33.200 AS4837 CHINA UNICOM China169 Backbone 7.58ms from Beijing, CN
141.23.20.200 AS680 Verein zur Foerderung eines Deutschen Forschungsnetzes e.V. 1.10ms from Berlin, DE
96.180.42.136 AS36196 Comcast Cable Communications, LLC 0.88ms from Chicago, US
34.28.116.56 AS396982 Google LLC 0.40ms from Council Bluffs, US
87.34.55.8 AS1213 ASIERA TECHNOLOGY SERVICES CLG 11.25ms from Dublin, IE
79.227.208.120 AS3320 Deutsche Telekom AG 4.08ms from Duesseldorf, DE
217.95.149.168 AS3320 Deutsche Telekom AG 10.13ms from Frankfurt am Main, DE
98.98.118.200 AS21859 Zenlayer Inc 0.41ms from Jakarta, ID

Traceroute

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

$
traceroute -a -n -q1 -f3 -m7 128.138.175.32
traceroute to 128.138.175.32 (128.138.175.32): 7 hops max, 52 byte packets
3 [AS3356] 65.59.16.190 6.803 ms
4 [AS104] 128.138.81.253 6.961 ms
5 *
6 *
7 *
Measurement taken from IPinfo ProbeNet in Casper, 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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