AS number 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 74
Number of IPv4 91,136
Number of IPv6 79,229,371,440,083,952,222,718,656,512
ASN type Education
Registry arin
Allocated 38 years ago on Apr 09, 1987
Updated 6 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
198.59.51.0/24 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
198.59.7.0/24 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 IP Whois Database Download

Hosted Domains

There are 74 domain names hosted across 35 IP addresses on this ASN.

Join for free to explore hosted domains ›
IP Address Domain Domains on this IP
128.138.68.45 ██████████ 13
128.138.135.43 █████████ 11
128.138.136.14 █████████ 7
128.138.136.36 ██████████ 4
128.138.29.28 ██████████ 3
128.138.70.66 ██████████ 2
128.138.67.162 ██████████ 2
128.138.136.96 ██████████ 2
128.138.73.57 █████████ 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 Hosted Domains Database Download

Peers

There are 2 peers for this ASN.

Peers 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 ASN Database Download

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 ASN Database Download

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 ASN Database Download

Pingable IPs

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

IP Address ASN Details
128.138.228.138 AS104 University of Colorado at Boulder 1.90ms from Denver, US
128.138.239.13 AS104 University of Colorado at Boulder 1.95ms from Denver, US
128.138.240.1 AS104 University of Colorado at Boulder 1.99ms from Denver, US
128.138.143.145 AS104 University of Colorado at Boulder 2.13ms from Denver, US
128.138.141.162 AS104 University of Colorado at Boulder 1.87ms from Denver, US
2620:18f:30:1000::2 AS104 University of Colorado at Boulder 1.22ms from Denver, US
128.138.149.11 AS104 University of Colorado at Boulder 2.43ms from Denver, US
146.5.21.120 AS104 University of Colorado at Boulder 1.86ms from Denver, US
128.138.184.24 AS104 University of Colorado at Boulder 1.69ms from Denver, US
128.138.136.10 AS104 University of Colorado at Boulder 1.75ms from Denver, US
128.138.29.188 AS104 University of Colorado at Boulder 1.86ms from Denver, US
128.138.163.41 AS104 University of Colorado at Boulder 2.12ms from Denver, US
198.59.83.103 AS104 University of Colorado at Boulder 2.16ms from Denver, US
128.138.150.57 AS104 University of Colorado at Boulder 2.18ms from Denver, US
128.138.179.35 AS104 University of Colorado at Boulder 2.58ms from Denver, US
128.138.101.155 AS104 University of Colorado at Boulder 247.26ms from Denver, US
192.12.238.1 AS104 University of Colorado at Boulder 1.26ms from Denver, US
128.138.105.208 AS104 University of Colorado at Boulder 2.22ms from Denver, US
128.138.75.13 AS104 University of Colorado at Boulder 2.82ms from Denver, US
128.138.88.16 AS104 University of Colorado at Boulder 2.46ms from Denver, US
192.12.245.119 AS104 University of Colorado at Boulder 1.25ms from Denver, US
2620:18f:20:8::12 AS104 University of Colorado at Boulder 1.99ms from Denver, US
128.138.133.19 AS104 University of Colorado at Boulder 2.87ms from Denver, US
128.138.86.8 AS104 University of Colorado at Boulder 1.86ms from Denver, US
146.5.20.1 AS104 University of Colorado at Boulder 1.65ms 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
149.154.165.136 AS62041 Telegram Messenger Inc 0.21ms from Amsterdam, NL
96.230.15.248 AS701 Verizon Business 1.73ms from Boston, US
118.119.194.168 AS4134 CHINANET-BACKBONE 4.39ms from Chengdu, CN
83.254.136.216 AS1257 Tele2 Sverige AB 8.61ms from Goeteborg, SE
51.178.143.72 AS16276 OVH SAS 0.11ms from Gravelines, FR
39.34.79.232 AS17557 Pakistan Telecommunication Company Limited 3.99ms from Lahore, PK
158.99.7.120 AS766 RedIRIS Autonomous System 13.54ms from Lisbon, PT
20.58.18.88 AS8075 Microsoft Corporation 0.15ms from London, GB
107.173.235.104 AS36352 HostPapa 0.24ms from Los Angeles, US
4.232.105.8 AS8075 Microsoft Corporation 0.57ms from Milan, IT
66.119.215.24 AS16713 Northwest Open Access Network 5.86ms from Seattle, US
119.213.164.248 AS4766 Korea Telecom 1.83ms from Seoul, KR
4.157.8.40 AS8075 Microsoft Corporation 0.59ms from Ashburn, US
141.255.3.200 AS3329 VODAFONE-PANAFON HELLENIC TELECOMMUNICATIONS COMPANY SA 1.65ms from Athens, GR
73.237.239.120 AS7922 Comcast Cable Communications, LLC 4.01ms from Atlanta, US
157.92.147.248 AS3449 Universidad Nacional de Buenos Aires 3.91ms from Buenos Aires, AR
131.243.115.120 AS16 Lawrence Berkeley National Laboratory 18.61ms from Hillsboro, US
60.217.218.24 AS4837 CHINA UNICOM China169 Backbone 2.25ms from Jinan, CN
82.20.225.72 AS5089 Virgin Media Limited 8.34ms from London, GB
91.85.50.88 AS8851 GCI Network Solutions Limited 4.83ms from London, GB
98.148.53.40 AS20001 Charter Communications Inc 4.80ms from Los Angeles, US
187.150.40.72 AS8151 UNINET 12.35ms from Miami, US
2.114.174.24 AS3269 Telecom Italia S.p.A. 18.11ms from Milan, IT
176.182.205.56 AS5410 Bouygues Telecom SA 2.22ms from Paris, FR
210.182.28.24 AS3786 LG DACOM Corporation 4.71ms from Seoul, KR

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 128.138.23.163
traceroute to 128.138.23.163 (128.138.23.163): 8 hops max, 52 byte packets
3 [AS3356] 4.69.219.74 123.366 ms
4 [AS3356] 65.59.16.190 118.944 ms
5 [AS104] 128.138.81.253 118.856 ms
6 *
7 *
8 *
Measurement taken from IPinfo ProbeNet in Amsterdam, NL
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