AS number 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 72
Number of IPv4 91,136
Number of IPv6 79,229,371,440,083,952,222,718,656,512
ASN type Education
Registry arin
Allocated 38 years ago on Apr 09, 1987
Updated 6 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
198.59.51.0/24 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
198.59.7.0/24 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 72 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 ██████████ 12
128.138.135.43 █████████ 11
128.138.136.14 ██████████ 7
128.138.136.36 ██████████ 4
128.138.29.28 ██████████ 3
128.138.67.162 ██████████ 2
128.138.70.66 ██████████ 2
128.138.136.96 ██████████ 2
128.138.136.220 ██████████ 2
128.138.93.14 ██████████ 2

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Peers

There are 3 peers for this ASN.

Peers Name
AS14041 University Corporation for Atmospheric Research
AS209 CenturyLink Communications, LLC
AS3356 Level 3 Parent, LLC
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ASN API ASN Database Download

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 ASN Database Download

Downstreams

There are no downstreams for this ASN.

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ASN API ASN Database Download

Pingable IPs

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

IP Address ASN Details
198.59.55.10 AS104 University of Colorado at Boulder 0.63ms from Denver, US
128.138.101.155 AS104 University of Colorado at Boulder 244.81ms from Denver, US
128.138.225.84 AS104 University of Colorado at Boulder 1.81ms from Denver, US
128.138.105.157 AS104 University of Colorado at Boulder 2.49ms from Denver, US
128.138.67.196 AS104 University of Colorado at Boulder 1.79ms from Denver, US
128.138.81.253 AS104 University of Colorado at Boulder 1.36ms from Denver, US
128.138.131.14 AS104 University of Colorado at Boulder 2.71ms from Denver, US
128.138.244.15 AS104 University of Colorado at Boulder 2.35ms from Denver, US
128.138.141.162 AS104 University of Colorado at Boulder 1.92ms from Denver, US
128.138.88.16 AS104 University of Colorado at Boulder 1.85ms from Denver, US
128.138.183.220 AS104 University of Colorado at Boulder 1.93ms from Denver, US
198.59.83.45 AS104 University of Colorado at Boulder 1.98ms from Denver, US
128.138.214.41 AS104 University of Colorado at Boulder 1.80ms from Denver, US
128.138.112.142 AS104 University of Colorado at Boulder 1.88ms from Denver, US
128.138.73.56 AS104 University of Colorado at Boulder 1.88ms from Denver, US
128.138.136.205 AS104 University of Colorado at Boulder 1.66ms from Denver, US
128.138.128.74 AS104 University of Colorado at Boulder 1.61ms from Denver, US
128.138.143.145 AS104 University of Colorado at Boulder 2.46ms from Denver, US
192.12.244.18 AS104 University of Colorado at Boulder 1.22ms from Denver, US
128.138.68.45 AS104 University of Colorado at Boulder 2.12ms from Denver, US
128.138.118.7 AS104 University of Colorado at Boulder 2.35ms from Denver, US
128.138.96.3 AS104 University of Colorado at Boulder 2.69ms from Denver, US
198.59.70.1 AS104 University of Colorado at Boulder 1.90ms from Denver, US
128.138.89.8 AS104 University of Colorado at Boulder 1.87ms from Denver, US
128.138.163.40 AS104 University of Colorado at Boulder 2.03ms 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
75.163.181.200 AS209 CenturyLink Communications, LLC 2.34ms from Denver, US
14.164.4.152 AS45899 VNPT Corp 2.31ms from Ho Chi Minh City, VN
34.101.100.24 AS396982 Google LLC 0.10ms from Jakarta, ID
208.181.106.24 AS852 TELUS Communications Inc. 0.90ms from Kelowna, CA
91.223.152.8 AS56439 Protection and Security Plus LTD 9.16ms from Kharkiv, UA
94.14.16.200 AS5607 Sky UK Limited 5.55ms from London, GB
12.176.35.216 AS7018 AT&T Enterprises, LLC 1.38ms from Miami, US
81.64.161.88 AS15557 Societe Francaise Du Radiotelephone - SFR SA 7.54ms from Paris, FR
183.121.116.24 AS4766 Korea Telecom 5.42ms from Seoul, KR
149.154.165.136 AS62041 Telegram Messenger Inc 0.23ms from Amsterdam, NL
37.116.159.232 AS30722 Vodafone Italia S.p.A. 13.20ms from Arezzo, IT
192.251.58.248 AS7086 Mississippi, Department of Information Technology Services (ITS) 8.12ms from Atlanta, US
148.63.169.104 AS12353 Vodafone Portugal 7.58ms from Lisbon, PT
217.41.67.104 AS2856 British Telecommunications PLC 2.39ms from London, GB
81.102.238.8 AS5089 Virgin Media Limited 5.82ms from London, GB
107.167.13.152 AS46844 Sharktech 0.18ms from Los Angeles, US
89.92.33.120 AS5410 Bouygues Telecom SA 14.78ms from Lyon, FR
83.44.68.184 AS3352 TELEFONICA DE ESPANA S.A.U. 10.90ms from Madrid, ES
106.70.108.40 AS4804 Microplex PTY LTD 1.75ms from Melbourne, AU
173.49.197.40 AS701 Verizon Business 3.52ms from Philadelphia, US
27.222.24.136 AS4837 CHINA UNICOM China169 Backbone 0.10ms from Qingdao, CN
220.87.199.8 AS4766 Korea Telecom 4.46ms from Seoul, KR
1.224.50.24 AS9318 SK Broadband Co Ltd 1.46ms from Seoul, KR
120.136.122.56 AS9698 LG HelloVision Corp. 9.88ms from Seoul, KR
102.24.43.200 AS327934 SOCIETE NATIONALE DES TELECOMMUNICATIONS (Tunisie Telecom) 11.37ms from Tunis, TN

Traceroute

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

$
traceroute -a -n -q1 -m7 128.138.179.35
traceroute to 128.138.179.35 (128.138.179.35): 7 hops max, 52 byte packets
1 [AS63023] 69.50.92.1 0.319 ms
2 *
3 [] 206.53.175.22 0.363 ms
4 [AS104] 198.59.55.9 1.364 ms
5 *
6 *
7 *
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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