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 79,229,371,440,083,952,629,200,000,000
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 ██████████ 13
128.138.135.43 █████████ 9
128.138.136.14 ██████████ 9
128.138.136.36 ██████████ 4
128.138.29.28 ██████████ 3
128.138.93.186 ██████████ 2
128.138.97.77 █████████ 2
128.138.67.195 ██████████ 2
128.138.70.66 ██████████ 2
128.138.136.96 ██████████ 2

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Peers

There are 2 peers for this ASN.

Peers Name
AS14041 University Corporation for Atmospheric Research
AS3356 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

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

IP Address ASN Details
192.12.245.129 AS104 University of Colorado at Boulder 1.09ms from Denver, US
128.138.141.162 AS104 University of Colorado at Boulder 1.92ms from Denver, US
128.138.131.26 AS104 University of Colorado at Boulder 2.12ms from Denver, US
192.12.242.1 AS104 University of Colorado at Boulder 1.08ms from Denver, US
2620:18f:0:10a0::1 AS104 University of Colorado at Boulder 0.53ms from Denver, US
192.12.240.33 AS104 University of Colorado at Boulder 1.08ms from Denver, US
2620:18f:30:1000::2 AS104 University of Colorado at Boulder 1.21ms from Denver, US
198.59.51.5 AS104 University of Colorado at Boulder 1.68ms from Denver, US
146.5.23.212 AS104 University of Colorado at Boulder 1.05ms from Denver, US
128.138.138.121 AS104 University of Colorado at Boulder 1.65ms from Denver, US
198.59.55.10 AS104 University of Colorado at Boulder 0.62ms from Denver, US
128.138.213.15 AS104 University of Colorado at Boulder 2.21ms from Denver, US
192.12.238.129 AS104 University of Colorado at Boulder 1.00ms from Denver, US
128.138.232.65 AS104 University of Colorado at Boulder 1.51ms from Denver, US
146.5.20.151 AS104 University of Colorado at Boulder 1.58ms from Denver, US
192.12.244.2 AS104 University of Colorado at Boulder 1.01ms from Denver, US
198.59.7.21 AS104 University of Colorado at Boulder 1.81ms from Denver, US
128.138.81.197 AS104 University of Colorado at Boulder 1.18ms from Denver, US
128.138.82.254 AS104 University of Colorado at Boulder 1.13ms 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
35.245.82.232 AS396982 Google LLC 0.12ms from Ashburn, US
24.56.144.40 AS11232 Midcontinent Communications 0.53ms from Denver, US
68.37.96.8 AS7922 Comcast Cable Communications, LLC 8.06ms from Flint, US
57.128.0.184 AS16276 OVH SAS 0.07ms from Gravelines, FR
14.226.109.40 AS45899 VNPT Corp 5.05ms from Hanoi, VN
168.76.222.248 AS137951 ASLINE LIMITED 0.79ms from Hong Kong, HK
96.40.179.104 AS20115 Charter Communications LLC 11.12ms from Los Angeles, US
97.182.49.56 AS6167 Verizon Business 18.21ms from Los Angeles, US
76.128.129.56 AS7922 Comcast Cable Communications, LLC 10.31ms from Miami, US
123.48.182.216 AS18126 Chubu Telecommunications Company, Inc. 7.27ms from Osaka, JP
74.123.176.136 AS46182 Microsoft Corporation 0.74ms from Seattle, US
106.119.181.88 AS134760 Shijiazhuang IDC network, CHINANET Hebei province 1.07ms from Shijiazhuang, CN
140.137.239.248 AS1659 Taiwan Academic Network (TANet) Information Center 2.39ms from Taipei, TW
220.221.113.200 AS4713 NTT DOCOMO BUSINESS,Inc. 4.25ms from Tokyo, JP
124.102.41.152 AS4713 NTT DOCOMO BUSINESS,Inc. 19.02ms from Tokyo, JP
185.51.10.248 AS208582 dogado GmbH 0.57ms from Vienna, AT
78.57.201.248 AS8764 Telia Lietuva, AB 1.13ms from Vilnius, LT
109.231.18.136 AS34525 KOBA Sp. z o.o. 2.71ms from Warsaw, PL
89.210.98.232 AS3329 Vodafone-panafon Hellenic Telecommunications Company SA 1.50ms from Athens, GR
12.152.125.40 AS7018 AT&T Enterprises, LLC 15.93ms from Atlanta, US
206.216.147.200 AS33227 Blue Bridge Networks 3.87ms from Buffalo, US
71.65.70.8 AS10796 Charter Communications Inc 15.41ms from Cleveland, US
178.141.176.24 AS8359 MTS PJSC 16.35ms from Moscow, RU
187.172.33.72 AS8151 UNINET 17.59ms from Santiago de Queretaro, MX
3.36.74.216 AS16509 Amazon.com, Inc. 0.91ms 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 -m7 128.138.117.121
traceroute to 128.138.117.121 (128.138.117.121): 7 hops max, 52 byte packets
3 [AS3356] 65.59.16.190 6.772 ms
4 [AS104] 128.138.81.253 6.977 ms
5 *
6 *
7 *
Measurement taken from IPinfo ProbeNet in Casper, 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.

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