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

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

IP Address ASN Details
128.138.213.15 AS104 University of Colorado at Boulder 2.21ms from Denver, US
192.12.244.2 AS104 University of Colorado at Boulder 1.01ms from Denver, US
128.138.131.26 AS104 University of Colorado at Boulder 2.12ms from Denver, US
2620:18f:30:1000::2 AS104 University of Colorado at Boulder 1.21ms from Denver, US
146.5.23.212 AS104 University of Colorado at Boulder 1.05ms from Denver, US
128.138.232.65 AS104 University of Colorado at Boulder 1.51ms from Denver, US
192.12.242.1 AS104 University of Colorado at Boulder 1.08ms from Denver, US
128.138.81.197 AS104 University of Colorado at Boulder 1.18ms from Denver, US
192.12.240.33 AS104 University of Colorado at Boulder 1.08ms from Denver, US
128.138.138.121 AS104 University of Colorado at Boulder 1.65ms from Denver, US
198.59.7.21 AS104 University of Colorado at Boulder 1.81ms from Denver, US
198.59.55.10 AS104 University of Colorado at Boulder 0.62ms from Denver, US
192.12.245.129 AS104 University of Colorado at Boulder 1.09ms from Denver, US
198.59.51.5 AS104 University of Colorado at Boulder 1.68ms from Denver, US
128.138.82.254 AS104 University of Colorado at Boulder 1.13ms from Denver, US
2620:18f:0:10a0::1 AS104 University of Colorado at Boulder 0.53ms from Denver, US
146.5.20.151 AS104 University of Colorado at Boulder 1.58ms from Denver, US
128.138.141.162 AS104 University of Colorado at Boulder 1.92ms from Denver, US
192.12.238.129 AS104 University of Colorado at Boulder 1.00ms 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
80.60.2.152 AS1136 KPN B.V. 2.66ms from Amsterdam, NL
186.132.223.88 AS22927 Telefonica de Argentina 2.00ms from Buenos Aires, AR
74.133.77.120 AS10796 Charter Communications Inc 10.16ms from Columbus, US
41.82.118.88 AS8346 SONATEL-AS Autonomous System 2.08ms from Dakar, SN
34.18.137.40 AS396982 Google LLC 0.10ms from Doha, QA
47.243.178.136 AS45102 Alibaba (US) Technology Co., Ltd. 0.48ms from Hong Kong, HK
95.228.87.104 AS3269 Telecom Italia S.p.A. 4.30ms from Milan, IT
100.16.77.216 AS701 Verizon Business 4.16ms from Philadelphia, US
60.7.189.8 AS4837 CHINA UNICOM China169 Backbone 13.51ms from Qingdao, CN
34.229.66.120 AS14618 Amazon.com, Inc. 0.41ms from Reston, US
73.189.144.168 AS7922 Comcast Cable Communications, LLC 6.30ms from San Jose, US
1.224.50.24 AS9318 SK Broadband Co Ltd 1.63ms from Seoul, KR
67.68.0.184 AS577 Bell Canada 6.18ms from Toronto, CA
78.62.132.232 AS8764 Telia Lietuva, AB 1.05ms from Vilnius, LT
40.114.79.136 AS8075 Microsoft Corporation 0.41ms from Ashburn, US
77.49.168.200 AS1241 Forthnet 10.90ms from Athens, GR
67.3.156.88 AS209 CenturyLink Communications, LLC 16.69ms from Denver, US
5.83.134.232 AS215136 Finn Hess trading as Ryzehosting 0.08ms from Kerkrade, NL
109.144.63.248 AS2856 British Telecommunications PLC 0.87ms from London, GB
61.200.127.216 AS10010 TOKAI Communications Corporation 6.08ms from Osaka, JP
74.123.176.136 AS46182 Microsoft Corporation 0.74ms from Seattle, US
3.36.74.216 AS16509 Amazon.com, Inc. 0.91ms from Seoul, KR
178.39.38.24 AS6730 Sunrise GmbH 2.46ms from Zuerich, CH
76.182.94.72 AS11426 Charter Communications Inc 13.26ms from Ashburn, US
171.250.125.168 AS7552 Viettel Group 0.98ms from Ho Chi Minh City, VN

Traceroute

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

$
traceroute -a -n -q1 -m6 129.19.255.169
traceroute to 129.19.255.169 (129.19.255.169): 6 hops max, 52 byte packets
2 *
4 *
5 *
6 *
Measurement taken from IPinfo ProbeNet in Cayenne, GF
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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