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 72
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 72 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 ██████████ 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
128.138.136.96 ██████████ 2
128.138.136.220 ██████████ 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
128.138.74.152 AS104 University of Colorado at Boulder 2.09ms from Denver, US
128.138.87.50 AS104 University of Colorado at Boulder 2.40ms from Denver, US
128.138.140.44 AS104 University of Colorado at Boulder 1.24ms from Denver, US
128.138.143.145 AS104 University of Colorado at Boulder 2.46ms from Denver, US
128.138.97.80 AS104 University of Colorado at Boulder 1.69ms from Denver, US
192.12.240.33 AS104 University of Colorado at Boulder 1.30ms from Denver, US
128.138.138.121 AS104 University of Colorado at Boulder 1.95ms from Denver, US
128.138.225.84 AS104 University of Colorado at Boulder 1.81ms from Denver, US
198.59.7.134 AS104 University of Colorado at Boulder 1.68ms from Denver, US
128.138.130.30 AS104 University of Colorado at Boulder 1.90ms from Denver, US
128.138.81.253 AS104 University of Colorado at Boulder 1.36ms from Denver, US
128.138.88.16 AS104 University of Colorado at Boulder 1.85ms from Denver, US
192.12.244.18 AS104 University of Colorado at Boulder 1.22ms from Denver, US
198.59.51.5 AS104 University of Colorado at Boulder 1.83ms from Denver, US
128.138.70.84 AS104 University of Colorado at Boulder 2.11ms from Denver, US
128.138.92.38 AS104 University of Colorado at Boulder 1.69ms from Denver, US
128.138.128.74 AS104 University of Colorado at Boulder 1.61ms from Denver, US
198.59.82.186 AS104 University of Colorado at Boulder 2.31ms from Denver, US
192.12.245.129 AS104 University of Colorado at Boulder 1.27ms from Denver, US
198.59.55.10 AS104 University of Colorado at Boulder 0.63ms from Denver, US
128.138.96.3 AS104 University of Colorado at Boulder 2.69ms from Denver, US
128.138.112.142 AS104 University of Colorado at Boulder 1.88ms from Denver, US
128.138.219.134 AS104 University of Colorado at Boulder 2.09ms from Denver, US
128.138.135.43 AS104 University of Colorado at Boulder 1.84ms from Denver, US
128.138.127.232 AS104 University of Colorado at Boulder 2.01ms 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
118.119.194.168 AS4134 CHINANET-BACKBONE 4.38ms from Chengdu, CN
107.91.55.136 AS20057 AT&T Enterprises, LLC 11.54ms from Chicago, US
50.124.206.104 AS5650 Frontier Communications of America, Inc. 16.63ms from Chicago, US
174.103.251.56 AS10796 Charter Communications Inc 9.84ms from Columbus, US
201.66.173.24 AS8167 V tal 9.82ms from Curitiba, BR
184.94.203.8 AS33522 cPanel, LLC. 7.84ms from Dallas, US
169.63.241.136 AS36351 IBM Cloud 0.84ms from Dallas, US
57.129.18.40 AS16276 OVH SAS 0.11ms from Frankfurt am Main, DE
91.42.81.200 AS3320 Deutsche Telekom AG 7.54ms from Frankfurt am Main, DE
95.172.165.152 AS15457 NOS Madeira Comunicacoes, S.A. 19.40ms from Lisbon, PT
92.148.66.8 AS3215 Orange S.A. 7.52ms from Paris, FR
23.198.109.104 AS16625 Akamai Technologies, Inc. 0.30ms from Seattle, US
183.101.1.184 AS4766 Korea Telecom 1.38ms from Seoul, KR
38.253.98.200 AS8948 099 PRIMO COMMUNICATIONS LTD 2.50ms from Tel Aviv, IL
104.142.130.248 AS33353 Sony Interactive Entertainment LLC 0.90ms from Tokyo, JP
171.4.15.184 AS45758 Triple T Broadband Public Company Limited 4.79ms from Bangkok, TH
186.126.157.200 AS7303 Telecom Argentina S.A. 12.31ms from Buenos Aires, AR
35.238.156.40 AS396982 Google LLC 0.12ms from Council Bluffs, US
210.86.229.24 AS24173 Netnam Company 0.92ms from Hanoi, VN
14.164.4.152 AS45899 VNPT Corp 2.31ms from Ho Chi Minh City, VN
66.139.16.248 AS7018 AT&T Enterprises, LLC 1.80ms from Houston, US
27.96.93.8 AS132165 Connect Communications 1.93ms from Karachi, PK
79.40.33.152 AS3269 Telecom Italia S.p.A. 3.96ms from Milan, IT
46.72.76.120 AS12714 PJSC MegaFon 7.88ms from Moscow, RU
187.66.216.40 AS28573 Claro NXT Telecomunicacoes Ltda 5.48ms from Osasco, BR

Traceroute

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

$
traceroute -a -n -q1 -m5 129.19.251.54
traceroute to 129.19.251.54 (129.19.251.54): 5 hops max, 52 byte packets
2 [AS3356] 4.26.24.5 2.395 ms
3 *
4 *
5 *
Measurement taken from IPinfo ProbeNet in Binghamton, 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