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
198.59.70.1 AS104 University of Colorado at Boulder 1.74ms from Denver, US
128.138.75.13 AS104 University of Colorado at Boulder 2.77ms from Denver, US
128.138.163.40 AS104 University of Colorado at Boulder 1.92ms from Denver, US
128.138.130.30 AS104 University of Colorado at Boulder 2.40ms from Denver, US
128.138.131.34 AS104 University of Colorado at Boulder 2.10ms from Denver, US
192.12.242.1 AS104 University of Colorado at Boulder 1.29ms from Denver, US
146.5.23.212 AS104 University of Colorado at Boulder 1.21ms from Denver, US
128.138.237.15 AS104 University of Colorado at Boulder 1.94ms from Denver, US
198.59.83.103 AS104 University of Colorado at Boulder 1.75ms from Denver, US
128.138.67.197 AS104 University of Colorado at Boulder 1.68ms from Denver, US
128.138.71.4 AS104 University of Colorado at Boulder 2.47ms from Denver, US
146.5.20.1 AS104 University of Colorado at Boulder 1.66ms from Denver, US
128.138.179.35 AS104 University of Colorado at Boulder 2.82ms from Denver, US
128.138.135.105 AS104 University of Colorado at Boulder 1.69ms from Denver, US
128.138.210.34 AS104 University of Colorado at Boulder 2.03ms from Denver, US
128.138.93.112 AS104 University of Colorado at Boulder 1.57ms from Denver, US
128.138.29.190 AS104 University of Colorado at Boulder 1.79ms from Denver, US
128.138.81.254 AS104 University of Colorado at Boulder 1.34ms from Denver, US
128.138.140.44 AS104 University of Colorado at Boulder 1.24ms from Denver, US
128.138.152.46 AS104 University of Colorado at Boulder 1.95ms from Denver, US
192.12.245.117 AS104 University of Colorado at Boulder 1.21ms from Denver, US
128.138.105.157 AS104 University of Colorado at Boulder 2.12ms from Denver, US
128.138.213.15 AS104 University of Colorado at Boulder 2.20ms from Denver, US
192.12.240.33 AS104 University of Colorado at Boulder 1.24ms from Denver, US
198.59.7.50 AS104 University of Colorado at Boulder 1.66ms 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
83.198.97.216 AS3215 Orange S.A. 15.94ms from Antananarivo, MG
79.210.29.56 AS3320 Deutsche Telekom AG 1.93ms from Berlin, DE
195.228.81.40 AS5483 Magyar Telekom Plc. 0.94ms from Budapest, HU
34.18.215.72 AS396982 Google LLC 0.09ms from Doha, QA
14.228.65.232 AS45899 VNPT Corp 4.96ms from Hanoi, VN
207.178.121.8 AS27425 IdeaTek Telcom, LLC 6.01ms from Kansas City, US
136.145.23.120 AS5786 University of Puerto Rico 2.44ms from San Juan, PR
118.79.83.24 AS4837 CHINA UNICOM China169 Backbone 4.12ms from Taiyuan, CN
80.60.2.152 AS1136 KPN B.V. 2.68ms from Amsterdam, NL
52.6.6.120 AS14618 Amazon.com, Inc. 0.53ms from Ashburn, US
32.192.102.168 AS14618 Amazon.com, Inc. 0.49ms from Ashburn, US
59.151.71.248 AS23724 IDC, China Telecommunications Corporation 3.49ms from Beijing, CN
68.146.199.216 AS6327 Shaw Communications 4.12ms from Calgary, CA
169.63.46.56 AS36351 IBM Cloud 1.08ms from Dallas, US
172.169.169.104 AS8075 Microsoft Corporation 0.19ms from Des Moines, US
3.64.55.72 AS16509 Amazon.com, Inc. 0.46ms from Frankfurt am Main, DE
93.237.27.72 AS3320 Deutsche Telekom AG 2.88ms from Frankfurt am Main, DE
217.41.67.104 AS2856 British Telecommunications PLC 2.71ms from London, GB
12.176.35.216 AS7018 AT&T Enterprises, LLC 1.40ms from Miami, US
82.61.119.232 AS3269 Telecom Italia S.p.A. 6.24ms from Milan, IT
49.68.78.104 AS4134 CHINANET-BACKBONE 9.14ms from Nanjing, CN
124.18.178.104 AS18126 Chubu Telecommunications Company, Inc. 6.41ms from Osaka, JP
78.202.35.24 AS12322 Free SAS 1.19ms from Paris, FR
46.43.78.152 AS51407 Mada Al-Arab General Services Company 0.74ms from Ramallah, PS
119.209.173.88 AS4766 Korea Telecom 1.89ms from Seoul, KR

Traceroute

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

$
traceroute -a -n -q1 -f3 -m8 128.138.90.213
traceroute to 128.138.90.213 (128.138.90.213): 8 hops max, 52 byte packets
3 [AS3356] 4.69.219.74 33.717 ms
4 [AS3356] 65.59.16.190 33.279 ms
5 [AS104] 128.138.81.253 33.313 ms
6 *
7 *
8 *
Measurement taken from IPinfo ProbeNet in Bend, 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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