Autonomous System details

AS1742

Harvard University  ·  harvard.edu

United States

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AS1742 – Harvard University

Field Value
Country United States
Website harvard.edu
Hosted domains 292
IPv4 addresses 203,520
IPv6 addresses 84,185,967,300,503,932,245,900,000,000
ASN type Education
Registry arin
Allocated 34 years ago on Feb 19, 1992
Updated 2 years ago on Dec 21, 2023

IP Ranges

Netblock Company Num of IPs
128.103.0.0/16 Harvard University 65,536
131.142.0.0/16 Smithsonian Astrophysical Observatory 65,536
140.247.0.0/16 Harvard University 65,536
65.112.0.0/20 Harvard University 4,096
67.134.204.0/22 Harvard University 1,024
199.94.60.0/22 Harvard University 1,024
140.247.111.0/24 Harvard University 256
140.247.152.0/24 Harvard University 256
140.247.174.0/24 Harvard University 256
140.247.236.0/24 Harvard University 256
192.5.66.0/24 Harvard University 256
192.54.223.0/24 Harvard University 256
192.131.102.0/24 Harvard University 256

Netblock Company
2607:fb60::/32 Harvard University
2602:fca9::/36 Harvard University
2607:fb60:2404::/46 Harvard University
2620:32:8000::/48 Smithsonian Astrophysical Observatory
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WHOIS Details

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                                                ASHandle:       AS1742
                                                OrgID:          AS1742
                                                ASName:         AS1742
                                                ASNumber:       AS1742
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA
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Hosted Domains

There are 292 domain names hosted across 55 IP addresses on this ASN.

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IP Address Domain Domains on this IP
128.103.64.94 ██████████ 101
128.103.64.74 ████████ 90
199.94.63.6 ██████████ 10
131.142.21.11 ██████████ 8
65.112.0.71 ██████████ 4
131.142.21.12 ██████████ 3
140.247.63.234 ██████████ 3
140.247.173.125 █████████ 3
128.103.109.12 ██████████ 3
128.103.124.40 ██████████ 3

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Peers

There are 9 peers for this ASN.

Peers Name
AS10578 Harvard University
AS11164 Internet2
AS11537 Internet2
AS1239 Cogent Communications, LLC
AS13315 Harvard Business School
AS174 Cogent Communications, LLC
AS3356 Level 3 Parent, LLC
AS396450 Internet2
AS40127 Longwood Medical and Academic Area (LMA)
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ASN API & Database

Upstreams

There are 5 upstreams for this ASN.

upstreams Name
AS10578 Harvard University
AS11164 Internet2
AS174 Cogent Communications, LLC
AS3356 Level 3 Parent, LLC
AS396450 Internet2
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ASN API & Database

Downstreams

There are 2 downstreams for this ASN.

Downstreams Name
AS13315 Harvard Business School
AS40127 Longwood Medical and Academic Area (LMA)
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ASN API & Database

Pingable IPs

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

IP Address ASN Details
140.247.149.117 AS1742 Harvard University 1.41ms from Boston, US
140.247.123.110 AS1742 Harvard University 1.24ms from Boston, US
140.247.117.47 AS1742 Harvard University 1.29ms from Boston, US
140.247.96.206 AS1742 Harvard University 1.25ms from Boston, US
128.103.176.171 AS1742 Harvard University 1.30ms from Boston, US
140.247.100.19 AS1742 Harvard University 1.26ms from Boston, US
128.103.179.1 AS1742 Harvard University 1.31ms from Boston, US
140.247.212.135 AS1742 Harvard University 1.30ms from Boston, US
140.247.84.36 AS1742 Harvard University 1.23ms from Boston, US
128.103.185.1 AS1742 Harvard University 1.20ms from Boston, US
140.247.28.58 AS1742 Harvard University 1.28ms from Boston, US
140.247.72.23 AS1742 Harvard University 1.30ms from Boston, US
2607:fb60:a:3::d AS1742 Harvard University 5.47ms from New York City, US
2607:fb60:6:1002::2 AS1742 Harvard University 6.16ms from New York City, US
128.103.225.1 AS1742 Harvard University 1.13ms from Boston, US
140.247.199.129 AS1742 Harvard University 1.14ms from Boston, US
140.247.171.225 AS1742 Harvard University 1.30ms from Boston, US
128.103.214.1 AS1742 Harvard University 1.14ms from Boston, US
128.103.249.65 AS1742 Harvard University 1.23ms from Boston, US
140.247.150.131 AS1742 Harvard University 1.66ms from Boston, US
2607:fb60:2501:2177::100 AS1742 Harvard University 5.67ms from New York City, US
128.103.28.1 AS1742 Harvard University 1.37ms from Boston, US
140.247.82.35 AS1742 Harvard University 1.32ms from Boston, US
140.247.95.197 AS1742 Harvard University 1.33ms from Boston, US
140.247.108.230 AS1742 Harvard University 1.31ms from Boston, 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
81.204.226.46 AS1136 KPN B.V. 1.28ms from Amsterdam, NL
44.237.242.254 AS16509 Amazon.com, Inc. 0.14ms from Boardman, US
78.109.99.126 AS41897 Sat-Trakt D.O.O. 5.75ms from Budapest, HU
18.217.236.126 AS16509 Amazon.com, Inc. 0.16ms from Columbus, US
84.164.69.30 AS3320 Deutsche Telekom AG 2.99ms from Duesseldorf, DE
3.76.153.190 AS16509 Amazon.com, Inc. 0.32ms from Frankfurt am Main, DE
217.144.190.46 AS210644 AEZA GROUP LLC 0.51ms from Frankfurt am Main, DE
176.38.83.110 AS39608 Lanet Network Ltd 0.76ms from Kyiv, UA
122.194.67.254 AS4837 CHINA UNICOM China169 Backbone 5.44ms from Nanjing, CN
195.154.86.62 AS12876 Scaleway SAS 0.74ms from Paris, FR
98.246.166.222 AS7922 Comcast Cable Communications, LLC 8.24ms from Portland, US
218.57.168.94 AS4837 CHINA UNICOM China169 Backbone 7.89ms from Qingdao, CN
24.144.83.126 AS14061 DigitalOcean, LLC 0.32ms from Santa Clara, US
189.164.156.78 AS8151 UNINET 5.23ms from Santiago de Queretaro, MX
189.168.186.254 AS8151 UNINET 10.99ms from Santiago de Queretaro, MX
187.214.225.46 AS8151 UNINET 7.45ms from Santiago de Queretaro, MX
172.104.57.254 AS63949 Akamai Connected Cloud 0.11ms from Singapore, SG
219.91.68.254 AS131627 Peicity Digital Cable Television., LTD 1.33ms from Taipei, TW
140.112.161.254 AS17716 National Taiwan University 1.40ms from Taipei, TW
182.234.167.254 AS9416 Hoshin Multimedia Center Inc. 4.20ms from Taipei, TW
42.53.59.158 AS4837 CHINA UNICOM China169 Backbone 4.53ms from Tieling, CN
169.252.27.254 AS6966 U.S. Department of State 4.71ms from Ashburn, US
122.151.177.142 AS9443 Vocus Retail 2.99ms from Brisbane, AU
200.7.155.110 AS52399 Alvarez Cable Hogar S.A. 6.63ms from Buenos Aires, AR
200.250.173.254 AS4230 CLARO S.A. 2.14ms from Curitiba, 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 140.247.42.53
traceroute to 140.247.42.53 (140.247.42.53): 5 hops max, 52 byte packets
3 *
4 *
5 *
Measurement taken from IPinfo ProbeNet in Abu Dhabi, AE
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 AS1742 at robtex.

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