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
128.138.130.30 AS104 University of Colorado at Boulder 2.40ms from Denver, US
128.138.227.28 AS104 University of Colorado at Boulder 2.00ms from Denver, US
198.59.51.13 AS104 University of Colorado at Boulder 1.67ms from Denver, US
128.138.179.35 AS104 University of Colorado at Boulder 2.82ms from Denver, US
128.138.249.53 AS104 University of Colorado at Boulder 2.25ms from Denver, US
128.138.81.254 AS104 University of Colorado at Boulder 1.34ms from Denver, US
192.12.240.33 AS104 University of Colorado at Boulder 1.24ms from Denver, US
128.138.214.24 AS104 University of Colorado at Boulder 1.84ms from Denver, US
128.138.159.33 AS104 University of Colorado at Boulder 2.00ms from Denver, US
128.138.97.102 AS104 University of Colorado at Boulder 1.65ms from Denver, US
192.12.244.250 AS104 University of Colorado at Boulder 1.19ms from Denver, US
198.59.7.50 AS104 University of Colorado at Boulder 1.66ms 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
128.138.228.138 AS104 University of Colorado at Boulder 2.24ms from Denver, US
128.138.109.34 AS104 University of Colorado at Boulder 2.59ms from Denver, US
128.138.239.13 AS104 University of Colorado at Boulder 2.61ms from Denver, US
146.5.20.1 AS104 University of Colorado at Boulder 1.66ms from Denver, US
128.138.89.33 AS104 University of Colorado at Boulder 2.07ms from Denver, US
128.138.152.46 AS104 University of Colorado at Boulder 1.95ms from Denver, US
128.138.149.11 AS104 University of Colorado at Boulder 2.35ms from Denver, US
192.12.245.117 AS104 University of Colorado at Boulder 1.21ms from Denver, US
146.5.21.123 AS104 University of Colorado at Boulder 1.75ms from Denver, US
198.59.83.103 AS104 University of Colorado at Boulder 1.75ms from Denver, US
128.138.136.155 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
105.108.95.216 AS36947 Telecom Algeria 14.78ms from Algiers, DZ
50.85.190.104 AS8075 Microsoft Corporation 0.27ms from Amsterdam, NL
96.241.90.152 AS701 Verizon Business 1.94ms from Ashburn, US
211.169.241.248 AS3786 LG DACOM Corporation 2.50ms from Incheon, KR
168.167.169.40 AS14988 Botswana Telecommunications Corporation 5.95ms from Johannesburg, ZA
207.178.121.8 AS27425 IdeaTek Telcom, LLC 6.01ms from Kansas City, US
199.47.210.168 AS53340 VegasNAP, LLC 0.29ms from Las Vegas, US
148.197.6.8 AS786 Jisc Services Limited 4.43ms from London, GB
95.239.83.232 AS3269 Telecom Italia S.p.A. 6.56ms from Naples, IT
187.145.31.56 AS8151 UNINET 1.28ms from Santiago de Queretaro, MX
208.127.23.216 AS394089 Google LLC 0.85ms from Sao Paulo, BR
172.221.177.184 AS20115 Charter Communications LLC 5.57ms from St. Louis, US
133.159.0.152 AS2497 Internet Initiative Japan Inc. 4.70ms from Tokyo, JP
91.217.203.168 AS25378 BCR Asigurari SA 1.44ms from Bucharest, RO
195.228.81.40 AS5483 Magyar Telekom Plc. 0.94ms from Budapest, HU
71.211.154.248 AS209 CenturyLink Communications, LLC 1.99ms from Denver, US
71.205.11.72 AS7922 Comcast Cable Communications, LLC 7.07ms from Denver, US
104.245.52.8 AS63251 Metro Wireless International, Inc. 0.58ms from Detroit, US
79.227.208.120 AS3320 Deutsche Telekom AG 4.02ms from Duesseldorf, DE
34.157.178.40 AS396982 Google LLC 0.10ms from Frankfurt am Main, DE
115.74.2.88 AS7552 Viettel Group 2.54ms from Ho Chi Minh City, VN
95.56.174.24 AS9198 JSC Kazakhtelecom 7.78ms from Karagandy, KZ
31.111.124.168 AS6871 Plusnet 4.85ms from London, GB
198.54.126.136 AS22612 Namecheap, Inc. 9.86ms from Los Angeles, US
47.104.137.136 AS37963 Hangzhou Alibaba Advertising Co.,Ltd. 0.24ms from Qingdao, CN

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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