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 77
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 77 domain names hosted across 35 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
128.138.93.14 ██████████ 2
128.138.70.66 ██████████ 2
128.138.67.162 ██████████ 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

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

IP Address ASN Details
128.138.67.143 AS104 University of Colorado at Boulder 1.69ms from Denver, US
128.138.152.46 AS104 University of Colorado at Boulder 2.22ms from Denver, US
128.138.150.57 AS104 University of Colorado at Boulder 2.64ms from Greenwood Village, US
128.138.240.1 AS104 University of Colorado at Boulder 1.73ms from Denver, US
128.138.196.134 AS104 University of Colorado at Boulder 1.88ms from Denver, US
192.12.240.33 AS104 University of Colorado at Boulder 1.26ms from Denver, US
128.138.97.99 AS104 University of Colorado at Boulder 1.74ms from Denver, US
128.138.225.117 AS104 University of Colorado at Boulder 1.83ms from Denver, US
128.138.219.134 AS104 University of Colorado at Boulder 1.91ms from Denver, US
128.138.118.7 AS104 University of Colorado at Boulder 2.13ms from Denver, US
128.138.92.105 AS104 University of Colorado at Boulder 1.78ms from Denver, US
128.138.29.188 AS104 University of Colorado at Boulder 1.72ms from Denver, US
128.138.244.13 AS104 University of Colorado at Boulder 2.61ms from Denver, US
128.138.159.33 AS104 University of Colorado at Boulder 2.26ms from Denver, US
128.138.213.15 AS104 University of Colorado at Boulder 2.62ms from Denver, US
128.138.237.15 AS104 University of Colorado at Boulder 2.12ms from Denver, US
128.138.81.254 AS104 University of Colorado at Boulder 1.38ms from Denver, US
198.59.70.216 AS104 University of Colorado at Boulder 1.95ms from Denver, US
128.138.73.56 AS104 University of Colorado at Boulder 1.84ms from Denver, US
128.138.105.157 AS104 University of Colorado at Boulder 1.95ms from Denver, US
128.138.183.38 AS104 University of Colorado at Boulder 1.74ms from Denver, US
128.138.184.16 AS104 University of Colorado at Boulder 1.63ms from Denver, US
128.138.127.231 AS104 University of Colorado at Boulder 2.15ms from Denver, US
128.138.212.15 AS104 University of Colorado at Boulder 1.94ms from Denver, US
128.138.138.124 AS104 University of Colorado at Boulder 2.22ms 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
93.222.156.88 AS3320 Deutsche Telekom AG 8.70ms from Frankfurt am Main, DE
57.128.0.184 AS16276 OVH SAS 0.07ms from Gravelines, FR
116.101.15.72 AS7552 Viettel Group 3.60ms from Hanoi, VN
43.218.11.152 AS16509 Amazon.com, Inc. 0.16ms from Jakarta, ID
104.18.156.56 AS13335 Cloudflare, Inc. 0.10ms from Lisbon, PT
118.211.80.40 AS7545 TPG Telecom Limited 12.85ms from Melbourne, AU
128.53.168.40 AS2514 NTT PC Communications, Inc. 2.27ms from Osaka, JP
72.95.18.24 AS701 Verizon Business 3.32ms from Philadelphia, US
104.100.62.168 AS16625 Akamai Technologies, Inc. 0.60ms from San Jose, US
122.107.67.248 AS4804 Microplex PTY LTD 5.46ms from Sydney, AU
1.175.211.72 AS3462 Data Communication Business Group 5.78ms from Taichung, TW
109.231.18.136 AS34525 KOBA Sp. z o.o. 2.77ms from Warsaw, PL
87.206.7.104 AS9141 P4 Sp. z o.o. 14.16ms from Warsaw, PL
23.197.248.56 AS16625 Akamai Technologies, Inc. 0.59ms from Atlanta, US
223.72.204.120 AS56048 China Mobile Communicaitons Corporation 3.27ms from Beijing, CN
20.157.64.248 AS8069 Microsoft Corporation 0.27ms from Boydton, US
197.49.106.152 AS8452 TE-AS 6.26ms from Cairo, EG
107.91.55.136 AS20057 AT&T Enterprises, LLC 11.74ms from Chicago, US
97.209.12.56 AS6167 Verizon Business 17.98ms from Chicago, US
108.209.249.8 AS7018 AT&T Enterprises, LLC 2.25ms from Chicago, US
217.43.180.104 AS2856 British Telecommunications PLC 7.49ms from Erith, GB
120.193.61.120 AS56041 China Mobile communications corporation 3.83ms from Hangzhou, CN
165.138.60.136 AS11686 Zayo Bandwidth 3.34ms from Indianapolis, US
80.45.209.200 AS13285 TalkTalk Communications Limited 1.35ms from London, GB
88.60.50.136 AS3269 Telecom Italia S.p.A. 2.80ms from Milan, IT

Traceroute

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

$
traceroute -a -n -q1 -m7 128.138.171.237
traceroute to 128.138.171.237 (128.138.171.237): 7 hops max, 52 byte packets
1 [AS15169] 142.251.49.69 121.292 ms
2 *
3 [AS14041] 192.43.217.193 128.354 ms
4 [AS104] 198.59.55.9 127.893 ms
5 *
6 *
7 *
Measurement taken from IPinfo ProbeNet in Berlin, DE
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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