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 79,229,371,440,083,952,629,200,000,000
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 ██████████ 13
128.138.135.43 █████████ 9
128.138.136.14 ██████████ 9
128.138.136.36 ██████████ 4
128.138.29.28 ██████████ 3
128.138.93.186 ██████████ 2
128.138.97.77 █████████ 2
128.138.67.195 ██████████ 2
128.138.70.66 ██████████ 2
128.138.136.96 ██████████ 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

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

IP Address ASN Details
192.12.245.119 AS104 University of Colorado at Boulder 1.20ms from Denver, US
128.138.219.134 AS104 University of Colorado at Boulder 2.01ms from Denver, US
128.138.179.35 AS104 University of Colorado at Boulder 2.40ms from Denver, US
128.138.239.13 AS104 University of Colorado at Boulder 2.17ms from Denver, US
128.138.149.11 AS104 University of Colorado at Boulder 2.16ms from Denver, US
2620:18f:0:10a0::1 AS104 University of Colorado at Boulder 0.54ms from Denver, US
146.5.20.81 AS104 University of Colorado at Boulder 1.79ms from Denver, US
128.138.237.15 AS104 University of Colorado at Boulder 1.87ms from Denver, US
128.138.212.15 AS104 University of Colorado at Boulder 2.18ms from Denver, US
128.138.213.15 AS104 University of Colorado at Boulder 2.22ms from Denver, US
128.138.81.254 AS104 University of Colorado at Boulder 1.36ms from Denver, US
128.138.71.4 AS104 University of Colorado at Boulder 2.06ms from Denver, US
198.59.70.5 AS104 University of Colorado at Boulder 1.73ms from Denver, US
128.138.92.18 AS104 University of Colorado at Boulder 1.72ms from Denver, US
146.5.21.123 AS104 University of Colorado at Boulder 1.77ms from Denver, US
128.138.70.66 AS104 University of Colorado at Boulder 1.53ms from Denver, US
146.5.23.212 AS104 University of Colorado at Boulder 1.23ms from Denver, US
128.138.214.41 AS104 University of Colorado at Boulder 2.01ms from Denver, US
128.138.68.25 AS104 University of Colorado at Boulder 2.02ms from Denver, US
128.138.249.53 AS104 University of Colorado at Boulder 1.84ms from Denver, US
128.138.112.176 AS104 University of Colorado at Boulder 1.65ms from Denver, US
198.59.7.91 AS104 University of Colorado at Boulder 1.70ms from Denver, US
128.138.141.179 AS104 University of Colorado at Boulder 1.84ms from Denver, US
128.138.97.86 AS104 University of Colorado at Boulder 1.72ms from Denver, US
128.138.163.41 AS104 University of Colorado at Boulder 1.77ms 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
91.178.31.104 AS5432 Proximus NV 2.34ms from Brussels, BE
75.222.155.232 AS6167 Verizon Business 19.62ms from Chicago, US
23.78.48.40 AS16625 Akamai Technologies, Inc. 0.19ms from Copenhagen, DK
74.205.122.8 AS33070 Rackspace Hosting 1.01ms from Dallas, US
223.229.246.216 AS24560 Bharti Airtel Ltd., Telemedia Services 9.36ms from Delhi, IN
61.10.95.248 AS9908 HK Cable TV Ltd 3.73ms from Hong Kong, HK
195.190.199.200 AS12479 Orange Espagne SA 0.56ms from Madrid, ES
122.243.134.200 AS4134 CHINANET-BACKBONE 6.66ms from Ningbo, CN
83.115.213.8 AS3215 Orange S.A. 3.40ms from Paris, FR
54.175.45.120 AS14618 Amazon.com, Inc. 0.17ms from Reston, US
46.109.174.200 AS12578 SIA Tet 0.64ms from Riga, LV
203.140.157.24 AS2516 KDDI CORPORATION 4.85ms from Tokyo, JP
153.194.8.24 AS4713 NTT DOCOMO BUSINESS,Inc. 3.34ms from Tokyo, JP
184.24.37.24 AS16625 Akamai Technologies, Inc. 0.50ms from Atlanta, US
37.26.35.216 AS39232 Uninet LLC 1.32ms from Baku, AZ
20.47.60.232 AS8069 Microsoft Corporation 0.57ms from Boydton, US
168.205.50.136 AS265363 RV NET TELECOMUNICACOES LTDA 16.19ms from Brasilia, BR
76.92.243.168 AS11427 Charter Communications Inc 15.21ms from Dallas, US
73.162.64.120 AS7922 Comcast Cable Communications, LLC 5.20ms from Fremont, US
112.145.153.24 AS17858 LG POWERCOMM 2.36ms from Incheon, KR
180.71.70.248 AS9318 SK Broadband Co Ltd 10.35ms from Incheon, KR
195.170.46.88 AS8395 East Telecom Ltd. 1.24ms from Moscow, RU
101.140.24.104 AS17511 OPTAGE Inc. 2.32ms from Osaka, JP
27.197.252.168 AS4837 CHINA UNICOM China169 Backbone 7.98ms from Qingdao, CN
179.94.31.120 AS26599 TELEFÔNICA BRASIL S.A 2.10ms from Sao Paulo, BR

Traceroute

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

$
traceroute -a -n -q1 -f3 128.138.136.10
traceroute to 128.138.136.10 (128.138.136.10): 64 hops max, 52 byte packets
4 [AS104] 198.59.55.9 1.286 ms
5 [AS104] 128.138.81.194 3.109 ms
6 *
7 *
8 *
9 *
10 [AS104] 128.138.136.10 4.247 ms
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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