Autonomous System details

AS104

University of Colorado at Boulder  ·  colorado.edu

United States

Need more data or want to access it via API or data downloads? Sign up to get free access

Sign up for free ›

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
Get this data and more with IPinfo's powerful IP Ranges API - quickly and easily identify company-owned IP ranges.
IP Ranges API

WHOIS Details

Join for free to view WHOIS details › 

                                                ASHandle:       AS104
                                                OrgID:          AS104
                                                ASName:         AS104
                                                ASNumber:       AS104
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA
Get this data and more with IPinfo's WHOIS product - effortless access to POCs, ORGs, and Networks, for actionable intelligence.
IP WHOIS API & Database

Hosted Domains

There are 78 domain names hosted across 36 IP addresses on this ASN.

Join for free to explore hosted domains ›
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

Discover all domains hosted on a single IP address with IPinfo's powerful Hosted Domains (Reverse IP) solution.
Useful for Cybersecurity
Hosted Domains API & Database

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
Get this data and more insights on related domains, allocation dates, registry names, IP counts with IPinfo's IP-to-ASN product.
ASN API & Database

Upstreams

There are 2 upstreams for this ASN.

upstreams Name
AS14041 University Corporation for Atmospheric Research
AS3356 Level 3 Parent, LLC
Get this data and more insights on related domains, allocation dates, registry names, IP counts with IPinfo's IP-to-ASN product.
ASN API & Database

Downstreams

There are no downstreams for this ASN.

Get this data and more insights on related domains, allocation dates, registry names, IP counts with IPinfo's IP-to-ASN product.
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
128.138.89.33 AS104 University of Colorado at Boulder 2.01ms from Denver, US
198.59.7.119 AS104 University of Colorado at Boulder 1.69ms from Denver, US
128.138.184.80 AS104 University of Colorado at Boulder 1.69ms from Denver, US
128.138.150.57 AS104 University of Colorado at Boulder 2.34ms from Denver, US
128.138.163.40 AS104 University of Colorado at Boulder 1.98ms from Denver, US
146.5.21.121 AS104 University of Colorado at Boulder 1.74ms from Denver, US
128.138.81.197 AS104 University of Colorado at Boulder 1.35ms from Denver, US
192.12.240.33 AS104 University of Colorado at Boulder 1.23ms from Denver, US
146.5.20.125 AS104 University of Colorado at Boulder 1.76ms from Denver, US
146.5.23.212 AS104 University of Colorado at Boulder 1.23ms from Denver, US
2620:18f:0:10a0::1 AS104 University of Colorado at Boulder 0.51ms from Denver, US
128.138.213.15 AS104 University of Colorado at Boulder 2.28ms from Denver, US
128.138.86.50 AS104 University of Colorado at Boulder 1.98ms from Denver, US
2620:18f:30:1000::2 AS104 University of Colorado at Boulder 1.24ms from Denver, US
192.12.242.1 AS104 University of Colorado at Boulder 1.29ms from Denver, US
128.138.136.161 AS104 University of Colorado at Boulder 1.61ms from Denver, US
128.138.131.2 AS104 University of Colorado at Boulder 2.21ms from Denver, US
128.138.144.112 AS104 University of Colorado at Boulder 2.47ms from Denver, US
198.59.51.14 AS104 University of Colorado at Boulder 1.69ms from Denver, US
128.138.96.3 AS104 University of Colorado at Boulder 2.40ms from Denver, US
198.59.83.103 AS104 University of Colorado at Boulder 1.82ms from Denver, US
128.138.196.134 AS104 University of Colorado at Boulder 1.75ms from Denver, US
128.138.210.34 AS104 University of Colorado at Boulder 2.29ms from Denver, US
128.138.228.138 AS104 University of Colorado at Boulder 1.78ms from Denver, US
128.138.212.15 AS104 University of Colorado at Boulder 2.16ms 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
206.161.9.8 AS3491 PCCW Global, Inc. 4.92ms from Ashburn, US
91.85.167.136 AS19331 Twin Lakes Telephone Cooperative Corporation 12.89ms from Atlanta, US
68.63.2.136 AS7922 Comcast Cable Communications, LLC 10.97ms from Atlanta, US
119.27.163.200 AS45090 Shenzhen Tencent Computer Systems Company Limited 0.87ms from Chengdu, CN
34.118.201.56 AS396982 Google LLC 0.11ms from Council Bluffs, US
79.227.208.120 AS3320 Deutsche Telekom AG 4.14ms from Duesseldorf, DE
217.250.39.248 AS3320 Deutsche Telekom AG 2.77ms from Frankfurt am Main, DE
95.144.224.56 AS2856 British Telecommunications PLC 3.12ms from London, GB
176.26.219.88 AS5607 Sky UK Limited 5.96ms from London, GB
162.220.246.216 AS64080 SYN LTD 0.34ms from London, GB
76.89.113.56 AS20001 Charter Communications Inc 4.61ms from Los Angeles, US
98.254.26.136 AS7922 Comcast Cable Communications, LLC 8.99ms from Miami, US
13.216.236.104 AS14618 Amazon.com, Inc. 0.21ms from Reston, US
84.215.92.168 AS25400 Telia Norge AS 7.08ms from Sandefjord, NO
115.17.102.40 AS4766 Korea Telecom 7.56ms from Seoul, KR
146.97.154.152 AS786 Jisc Services Limited 8.57ms from Sheffield, GB
183.177.76.248 AS10310 Yahoo Holdings Inc. 0.25ms from Taipei, TW
34.48.191.136 AS396982 Google LLC 0.12ms from Ashburn, US
141.23.177.8 AS680 Verein zur Foerderung eines Deutschen Forschungsnetzes e.V. 5.07ms from Berlin, DE
59.93.154.88 AS9829 National Internet Backbone 2.03ms from Chennai, IN
67.167.242.168 AS7922 Comcast Cable Communications, LLC 5.47ms from Chicago, US
189.179.20.216 AS8151 UNINET 11.48ms from Guadalajara, MX
1.229.137.72 AS9318 SK Broadband Co Ltd 1.68ms from Incheon, KR
167.60.206.136 AS6057 Administracion Nacional de Telecomunicaciones 1.75ms from Montevideo, UY
123.48.182.216 AS18126 Chubu Telecommunications Company, Inc. 7.21ms from Osaka, JP

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 128.138.60.58
traceroute to 128.138.60.58 (128.138.60.58): 8 hops max, 52 byte packets
3 [AS3356] 4.69.219.70 152.883 ms
4 [AS3356] 65.59.16.190 153.025 ms
5 [AS104] 128.138.81.253 153.409 ms
6 *
7 *
8 *
Measurement taken from IPinfo ProbeNet in Rio de Janeiro, BR
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.

Data built with users in mind: reliable, accurate, and easy-to-use

Discover why industry-leading companies around the globe love our data. IPinfo's accurate insights fuel use cases from cybersecurity, data enrichment, web personalization, and much more.

Get Started for Free Contact Sales
IPinfo for all your IP geolocation needs

Our IP tools

Explore all tools
What is my IP

What is my IP

Test our data accuracy by viewing insights from your IP address.

See your IP address
Map IPs

Map IPs

Paste up to 500,000 IPs to see where they're located on a map.

Try Map IPs
Summarize IPs

Summarize IPs

Use our data visualization tool to create a visual overview of multiple IPs.

Try Summarize IPs