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 3 peers for this ASN.

Peers Name
AS14041 University Corporation for Atmospheric Research
AS3356 Level 3 Parent, LLC
AS3549 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
128.138.219.134 AS104 University of Colorado at Boulder 2.14ms from Denver, US
128.138.68.25 AS104 University of Colorado at Boulder 1.98ms from Denver, US
128.138.249.53 AS104 University of Colorado at Boulder 2.25ms from Denver, US
128.138.112.176 AS104 University of Colorado at Boulder 1.90ms from Denver, US
128.138.67.197 AS104 University of Colorado at Boulder 1.68ms from Denver, US
128.138.93.112 AS104 University of Colorado at Boulder 1.57ms from Denver, US
128.138.74.152 AS104 University of Colorado at Boulder 1.94ms from Denver, US
128.138.97.102 AS104 University of Colorado at Boulder 1.65ms from Denver, US
128.138.227.28 AS104 University of Colorado at Boulder 2.00ms from Denver, US
128.138.89.33 AS104 University of Colorado at Boulder 2.07ms from Denver, US
128.138.118.7 AS104 University of Colorado at Boulder 2.68ms from Denver, US
128.138.196.134 AS104 University of Colorado at Boulder 1.60ms from Denver, US
2620:18f:0:10b0::1 AS104 University of Colorado at Boulder 0.56ms from Denver, US
128.138.191.41 AS104 University of Colorado at Boulder 1.84ms from Denver, US
128.138.81.254 AS104 University of Colorado at Boulder 1.34ms from Denver, US
128.138.163.40 AS104 University of Colorado at Boulder 1.92ms from Denver, US
146.5.21.123 AS104 University of Colorado at Boulder 1.75ms from Denver, US
128.138.210.34 AS104 University of Colorado at Boulder 2.03ms from Denver, US
192.12.238.1 AS104 University of Colorado at Boulder 1.20ms from Denver, US
128.138.138.121 AS104 University of Colorado at Boulder 1.63ms from Denver, US
128.138.213.15 AS104 University of Colorado at Boulder 2.20ms from Denver, US
128.138.152.46 AS104 University of Colorado at Boulder 1.95ms from Denver, US
128.138.179.35 AS104 University of Colorado at Boulder 2.82ms from Denver, US
198.59.83.103 AS104 University of Colorado at Boulder 1.75ms from Denver, US
128.138.140.44 AS104 University of Colorado at Boulder 1.24ms 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
54.196.99.40 AS14618 Amazon.com, Inc. 0.53ms from Ashburn, US
108.172.150.184 AS852 TELUS Communications Inc. 3.59ms from Kelowna, CA
77.121.18.8 AS25229 Limited Liability Company KYIVSKI TELEKOMUNIKATSIYNI MEREZHI 3.84ms from Kharkiv, UA
92.52.71.184 AS15395 Rackspace Ltd. 1.17ms from London, GB
12.176.35.216 AS7018 AT&T Enterprises, LLC 1.40ms from Miami, US
75.214.133.152 AS6167 Verizon Business 10.99ms from New York City, US
1.224.50.24 AS9318 SK Broadband Co Ltd 1.48ms from Seoul, KR
8.43.95.8 AS3356 Level 3 Parent, LLC 1.56ms from Ashburn, US
20.163.247.184 AS8075 Microsoft Corporation 0.39ms from Ashburn, US
87.160.25.152 AS3320 Deutsche Telekom AG 5.30ms from Berlin, DE
20.161.95.168 AS8075 Microsoft Corporation 0.32ms from Boydton, US
156.194.118.216 AS8452 TE-AS 7.40ms from Cairo, EG
199.214.36.200 AS393952 Service Alberta 2.74ms from Calgary, CA
149.172.127.216 AS3209 Vodafone GmbH 7.93ms from Frankfurt am Main, DE
34.157.178.40 AS396982 Google LLC 0.10ms from Frankfurt am Main, DE
78.132.103.136 AS8412 T-Mobile Austria GmbH 16.61ms from Graz, AT
60.187.85.152 AS4134 CHINANET-BACKBONE 8.64ms from Hangzhou, CN
123.31.81.184 AS45899 VNPT Corp 6.09ms from Ho Chi Minh City, VN
98.44.153.184 AS7922 Comcast Cable Communications, LLC 7.16ms from Houston, US
112.145.153.24 AS17858 LG POWERCOMM 2.35ms from Incheon, KR
182.228.174.40 AS17858 LG POWERCOMM 2.05ms from Incheon, KR
119.2.79.104 AS131704 PT Bank Central Asia, Tbk 2.32ms from Jakarta, ID
168.167.169.40 AS14988 Botswana Telecommunications Corporation 5.95ms from Johannesburg, ZA
194.65.40.120 AS3243 MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A. 1.21ms from Lisbon, PT
148.197.6.8 AS786 Jisc Services Limited 4.43ms from London, GB

Traceroute

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

$
traceroute -a -n -q1 -f3 -m10 128.138.45.151
traceroute to 128.138.45.151 (128.138.45.151): 10 hops max, 52 byte packets
4 *
5 [AS3356] 4.69.219.74 200.394 ms
6 [AS3356] 65.59.16.190 195.77 ms
7 [AS104] 128.138.81.253 195.842 ms
8 *
9 *
10 *
Measurement taken from IPinfo ProbeNet in Abidjan, CI
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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