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 37 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
128.138.67.162 ██████████ 2
128.138.93.14 ██████████ 2
128.138.67.195 ██████████ 2
128.138.136.96 ██████████ 2
128.138.70.66 ██████████ 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

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

IP Address ASN Details
128.138.225.109 AS104 University of Colorado at Boulder 1.89ms from Denver, US
2620:18f:0:10b0::1 AS104 University of Colorado at Boulder 0.60ms from Denver, US
128.138.227.28 AS104 University of Colorado at Boulder 2.01ms from Denver, US
192.12.238.152 AS104 University of Colorado at Boulder 1.21ms from Denver, US
128.138.159.33 AS104 University of Colorado at Boulder 2.15ms from Denver, US
128.138.89.8 AS104 University of Colorado at Boulder 2.28ms from Denver, US
128.138.97.86 AS104 University of Colorado at Boulder 1.74ms from Denver, US
128.138.96.3 AS104 University of Colorado at Boulder 2.39ms from Denver, US
128.138.228.138 AS104 University of Colorado at Boulder 2.19ms from Denver, US
128.138.213.5 AS104 University of Colorado at Boulder 2.35ms from Denver, US
128.138.140.44 AS104 University of Colorado at Boulder 1.30ms from Denver, US
128.138.81.254 AS104 University of Colorado at Boulder 1.38ms from Denver, US
128.138.101.155 AS104 University of Colorado at Boulder 241.84ms from Denver, US
198.59.83.45 AS104 University of Colorado at Boulder 1.97ms from Denver, US
128.138.179.35 AS104 University of Colorado at Boulder 2.66ms from Denver, US
128.138.244.13 AS104 University of Colorado at Boulder 2.71ms from Denver, US
128.138.88.16 AS104 University of Colorado at Boulder 1.90ms from Denver, US
128.138.109.34 AS104 University of Colorado at Boulder 2.63ms from Denver, US
128.138.92.141 AS104 University of Colorado at Boulder 1.70ms from Denver, US
128.138.127.232 AS104 University of Colorado at Boulder 2.02ms from Denver, US
128.138.184.12 AS104 University of Colorado at Boulder 1.80ms from Denver, US
198.59.70.1 AS104 University of Colorado at Boulder 2.00ms from Denver, US
128.138.139.9 AS104 University of Colorado at Boulder 2.07ms from Denver, US
128.138.249.53 AS104 University of Colorado at Boulder 2.26ms from Denver, US
128.138.135.43 AS104 University of Colorado at Boulder 1.83ms 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
54.225.136.24 AS14618 Amazon.com, Inc. 0.53ms from Ashburn, US
73.147.37.72 AS7922 Comcast Cable Communications, LLC 7.01ms from Ashburn, US
102.222.137.8 AS328735 Fibre Geeks Pty Ltd 0.99ms from Cape Town, ZA
118.119.194.168 AS4134 CHINANET-BACKBONE 4.40ms from Chengdu, CN
116.31.200.232 AS4134 CHINANET-BACKBONE 2.70ms from Guangzhou, CN
221.120.199.104 AS17557 Pakistan Telecommunication Company Limited 0.64ms from Karachi, PK
86.25.121.152 AS5089 Virgin Media Limited 10.65ms from London, GB
95.156.238.40 AS199610 marbis GmbH 0.20ms from Los Angeles, US
112.202.248.152 AS9299 Philippine Long Distance Telephone Company 1.39ms from Manila, PH
95.228.87.104 AS3269 Telecom Italia S.p.A. 4.39ms from Milan, IT
87.228.156.168 AS6866 Cyprus Telecommunications Authority 2.73ms from Nicosia, CY
82.127.177.8 AS3215 Orange S.A. 2.16ms from Paris, FR
92.152.57.168 AS3215 Orange S.A. 6.40ms from Paris, FR
112.243.182.72 AS4837 CHINA UNICOM China169 Backbone 7.04ms from Qingdao, CN
85.184.227.8 AS198731 Prisco Electronica S.L. 2.83ms from Barcelona, ES
206.1.31.136 AS18229 CtrlS 0.28ms from Bengaluru, IN
91.183.196.184 AS5432 Proximus NV 1.27ms from Brussels, BE
70.62.202.40 AS40488 National Interstate Insurance Company 7.93ms from Flint, US
84.188.129.168 AS3320 Deutsche Telekom AG 3.98ms from Frankfurt am Main, DE
123.31.42.168 AS135905 VIETNAM POSTS AND TELECOMMUNICATIONS GROUP 0.73ms from Hanoi, VN
165.154.27.8 AS135377 UCLOUD INFORMATION TECHNOLOGY (HK) LIMITED 1.03ms from Hong Kong, HK
217.106.107.24 AS8342 JSC RTComm.RU 0.66ms from Moscow, RU
112.84.65.248 AS4837 CHINA UNICOM China169 Backbone 9.54ms from Nanjing, CN
78.202.35.24 AS12322 Free SAS 1.17ms from Paris, FR
54.219.31.120 AS16509 Amazon.com, Inc. 0.15ms from San Jose, US

Traceroute

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

$
traceroute -a -n -q1 -m7 128.138.24.100
traceroute to 128.138.24.100 (128.138.24.100): 7 hops max, 52 byte packets
1 [AS36236] 192.73.242.1 3847.624 ms
2 *
3 *
4 [AS104] 198.59.55.9 2.312 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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