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
140.247.65.14 AS1742 Harvard University 1.53ms from Boston, US
128.103.249.65 AS1742 Harvard University 1.23ms from Boston, US
140.247.138.129 AS1742 Harvard University 1.45ms from Boston, US
128.103.134.81 AS1742 Harvard University 1.43ms from Boston, US
128.103.27.14 AS1742 Harvard University 1.23ms from Boston, US
128.103.147.168 AS1742 Harvard University 0.97ms from Boston, US
128.103.185.1 AS1742 Harvard University 1.20ms from Boston, US
140.247.129.11 AS1742 Harvard University 1.68ms from Boston, US
128.103.154.193 AS1742 Harvard University 1.09ms from Boston, US
2607:fb60:fe10:200::1 AS1742 Harvard University 5.86ms from New York City, US
140.247.235.193 AS1742 Harvard University 1.15ms from Boston, US
128.103.56.151 AS1742 Harvard University 1.10ms from Boston, US
140.247.119.60 AS1742 Harvard University 1.26ms from Boston, US
140.247.96.206 AS1742 Harvard University 1.25ms from Boston, US
128.103.32.33 AS1742 Harvard University 1.17ms from Boston, US
128.103.28.1 AS1742 Harvard University 1.37ms from Boston, US
128.103.225.1 AS1742 Harvard University 1.13ms from Boston, US
128.103.0.178 AS1742 Harvard University 1.01ms from Boston, US
140.247.71.29 AS1742 Harvard University 1.69ms from Boston, US
128.103.171.1 AS1742 Harvard University 1.37ms from Boston, US
128.103.197.1 AS1742 Harvard University 1.17ms from Boston, US
140.247.64.65 AS1742 Harvard University 1.54ms from Boston, US
140.247.198.161 AS1742 Harvard University 1.35ms from Boston, US
140.247.93.124 AS1742 Harvard University 1.33ms from Boston, US
128.103.239.1 AS1742 Harvard University 1.29ms 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
61.181.37.78 AS4837 CHINA UNICOM China169 Backbone 6.41ms from Beijing, CN
152.66.193.126 AS2547 Budapest University of Technology and Economics 0.69ms from Budapest, HU
186.233.154.254 AS263076 Universidade Estadual de Maringá - UEM 7.07ms from Curitiba, BR
50.115.251.46 AS46792 Paragould Municipal Utilities 12.20ms from Dallas, US
23.10.235.254 AS16625 Akamai Technologies, Inc. 0.12ms from Delhi, IN
31.18.149.254 AS3209 Vodafone GmbH 1.44ms from Hamburg, DE
183.107.112.190 AS4766 Korea Telecom 3.41ms from Incheon, KR
83.170.84.190 AS13213 THG HOSTING LIMITED 0.44ms from London, GB
88.32.37.110 AS3269 Telecom Italia S.p.A. 0.56ms from Milan, IT
71.34.238.254 AS19901 Brightspeed 2.79ms from Minneapolis, US
176.109.71.126 AS209024 MTS PJSC 1.74ms from Moscow, RU
122.194.67.254 AS4837 CHINA UNICOM China169 Backbone 5.44ms from Nanjing, CN
168.227.49.238 AS264872 Brothers Lan House Ltda Me 1.46ms from Osasco, BR
189.122.166.30 AS28573 Claro NXT Telecomunicacoes Ltda 8.39ms from Rio de Janeiro, BR
119.75.186.222 AS18318 LG HelloVision Corp. 7.77ms from Seoul, KR
218.152.67.30 AS4766 Korea Telecom 1.52ms from Seoul, KR
218.167.16.46 AS3462 Data Communication Business Group 2.17ms from Taipei, TW
219.71.188.254 AS9416 Hoshin Multimedia Center Inc. 4.63ms from Taipei, TW
42.53.59.158 AS4837 CHINA UNICOM China169 Backbone 4.53ms from Tieling, CN
81.204.226.46 AS1136 KPN B.V. 1.28ms from Amsterdam, NL
104.40.194.174 AS8075 Microsoft Corporation 0.22ms from Amsterdam, NL
195.251.176.30 AS5408 National Infrastructures for Research and Technology S.A. 1.48ms from Athens, GR
32.141.235.94 AS7018 AT&T Enterprises, LLC 0.73ms from Atlanta, US
89.133.246.254 AS21334 One Hungary Ltd. 6.46ms from Budapest, HU
75.189.16.142 AS11426 Charter Communications Inc 7.00ms from Charlotte, US

Traceroute

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

$
traceroute -a -n -q1 -m10 131.142.149.31
traceroute to 131.142.149.31 (131.142.149.31): 10 hops max, 52 byte packets
2 *
3 *
4 *
5 *
6 [AS3356] 4.31.157.126 156.617 ms
7 [AS1742] 128.103.0.129 159.052 ms
8 *
9 *
10 *
Measurement taken from IPinfo ProbeNet in Baku, AZ
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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