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 71
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 71 domain names hosted across 34 IP addresses on this ASN.

Join for free to explore hosted domains ›
IP Address Domain Domains on this IP
128.138.68.45 ██████████ 12
128.138.135.43 █████████ 11
128.138.136.14 ██████████ 7
128.138.136.36 ██████████ 4
128.138.29.28 ██████████ 3
128.138.67.162 ██████████ 2
128.138.70.66 ██████████ 2
128.138.73.57 █████████ 2
128.138.136.96 ██████████ 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 3 peers for this ASN.

Peers Name
AS14041 University Corporation for Atmospheric Research
AS209 CenturyLink Communications, LLC
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

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

IP Address ASN Details
128.138.75.13 AS104 University of Colorado at Boulder 2.86ms from Denver, US
128.138.239.13 AS104 University of Colorado at Boulder 1.97ms from Denver, US
198.59.70.1 AS104 University of Colorado at Boulder 1.90ms from Denver, US
192.12.242.1 AS104 University of Colorado at Boulder 1.38ms from Denver, US
128.138.127.232 AS104 University of Colorado at Boulder 2.01ms from Denver, US
128.138.130.30 AS104 University of Colorado at Boulder 1.90ms from Denver, US
128.138.183.220 AS104 University of Colorado at Boulder 1.93ms from Denver, US
128.138.149.11 AS104 University of Colorado at Boulder 1.93ms from Denver, US
198.59.82.186 AS104 University of Colorado at Boulder 2.31ms from Denver, US
128.138.237.15 AS104 University of Colorado at Boulder 1.99ms from Denver, US
128.138.138.121 AS104 University of Colorado at Boulder 1.95ms from Denver, US
128.138.70.84 AS104 University of Colorado at Boulder 2.11ms from Denver, US
128.138.163.40 AS104 University of Colorado at Boulder 2.03ms from Denver, US
128.138.214.41 AS104 University of Colorado at Boulder 1.80ms from Denver, US
128.138.88.16 AS104 University of Colorado at Boulder 1.85ms from Denver, US
128.138.97.80 AS104 University of Colorado at Boulder 1.69ms from Denver, US
128.138.244.15 AS104 University of Colorado at Boulder 2.35ms from Denver, US
128.138.184.85 AS104 University of Colorado at Boulder 1.73ms from Denver, US
192.12.244.18 AS104 University of Colorado at Boulder 1.22ms from Denver, US
198.59.7.134 AS104 University of Colorado at Boulder 1.68ms from Denver, US
128.138.133.19 AS104 University of Colorado at Boulder 2.21ms from Denver, US
192.12.238.129 AS104 University of Colorado at Boulder 1.25ms from Denver, US
128.138.141.162 AS104 University of Colorado at Boulder 1.92ms from Denver, US
146.5.21.122 AS104 University of Colorado at Boulder 1.82ms from Denver, US
198.59.83.45 AS104 University of Colorado at Boulder 1.98ms 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
141.255.3.200 AS3329 VODAFONE-PANAFON HELLENIC TELECOMMUNICATIONS COMPANY SA 1.89ms from Athens, GR
192.251.58.248 AS7086 Mississippi, Department of Information Technology Services (ITS) 8.12ms from Atlanta, US
97.179.231.72 AS6167 Verizon Business 18.91ms from Chicago, US
69.148.245.152 AS7018 AT&T Enterprises, LLC 4.00ms from Dallas, US
103.216.121.104 AS63766 VEGAGAME-VN 0.27ms from Hanoi, VN
27.65.99.88 AS7552 Viettel Group 3.98ms from Ho Chi Minh City, VN
209.203.31.216 AS11845 Vox Telecom Ltd 0.50ms from Johannesburg, ZA
185.149.235.120 AS62164 Heymman Servers Corporation 0.26ms from Kansas City, US
128.22.135.104 AS17511 OPTAGE Inc. 1.44ms from Osaka, JP
92.152.57.168 AS3215 Orange S.A. 5.76ms from Paris, FR
177.34.252.136 AS28573 Claro NXT Telecomunicacoes Ltda 14.38ms from Porto Alegre, BR
123.232.188.56 AS4837 CHINA UNICOM China169 Backbone 6.00ms from Qingdao, CN
62.118.154.40 AS8359 MTS PJSC 4.65ms from Saint Petersburg, RU
74.123.176.136 AS46182 Microsoft Corporation 0.75ms from Seattle, US
119.214.104.72 AS4766 Korea Telecom 1.51ms from Seoul, KR
120.136.122.56 AS9698 LG HelloVision Corp. 9.88ms from Seoul, KR
52.139.216.72 AS8075 Microsoft Corporation 0.61ms from Singapore, SG
60.227.40.232 AS1221 Telstra Limited 5.63ms from Sydney, AU
43.234.17.40 AS17506 ARTERIA Networks Corporation 2.03ms from Tokyo, JP
93.142.167.152 AS5391 Hrvatski Telekom d.d. 15.95ms from Zagreb, HR
77.162.29.216 AS1136 KPN B.V. 1.06ms from Amsterdam, NL
111.33.142.88 AS9808 China Mobile Communications Group Co., Ltd. 5.14ms from Beijing, CN
38.154.52.40 AS55286 B2 Net Solutions Inc. 0.16ms from Buffalo, US
75.163.181.200 AS209 CenturyLink Communications, LLC 2.34ms from Denver, US
68.32.86.248 AS7922 Comcast Cable Communications, LLC 6.01ms from Detroit, US

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 128.138.181.143
traceroute to 128.138.181.143 (128.138.181.143): 8 hops max, 52 byte packets
3 [AS3356] 4.69.219.70 32.426 ms
4 [AS3356] 65.59.16.190 33.012 ms
5 [AS104] 128.138.81.253 33.056 ms
6 *
7 *
8 *
Measurement taken from IPinfo ProbeNet in Atlanta, 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.

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