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 319
IPv4 addresses 204,032
IPv6 addresses 84,185,967,300,503,931,839,013,978,112
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
134.174.149.0/24 Longwood Medical and Academic Area (LMA) 256
134.174.150.0/24 Longwood Medical and Academic Area (LMA) 256
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 319 domain names hosted across 64 IP addresses on this ASN.

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IP Address Domain Domains on this IP
128.103.64.94 ██████████ 105
128.103.64.74 ████████ 94
131.142.21.11 ██████████ 8
131.142.21.13 ██████████ 5
65.112.0.71 ██████████ 4
128.103.124.40 ██████████ 3
140.247.173.13 ██████████ 3
140.247.63.234 ████████ 3
131.142.21.12 ██████████ 3
128.103.109.12 ██████████ 3

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Peers

There are 8 peers for this ASN.

Peers Name
AS10578 Harvard University
AS11164 Internet2
AS11537 Internet2
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

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

IP Address ASN Details
199.94.60.1 AS1742 Harvard University 3.40ms from Boston, US
128.103.182.32 AS1742 Harvard University 1.36ms from Boston, US
140.247.92.110 AS1742 Harvard University 1.33ms from Boston, US
140.247.80.198 AS1742 Harvard University 1.43ms from Boston, US
140.247.112.220 AS1742 Harvard University 1.28ms from Boston, US
140.247.149.117 AS1742 Harvard University 1.45ms from Boston, US
140.247.74.46 AS1742 Harvard University 1.36ms from Boston, US
128.103.4.1 AS1742 Harvard University 1.44ms from Boston, US
2607:fb60:0:2311::1 AS1742 Harvard University 5.71ms from New York City, US
2607:fb60:37:1::1 AS1742 Harvard University 5.85ms from New York City, US
128.103.236.1 AS1742 Harvard University 1.40ms from Boston, US
140.247.117.47 AS1742 Harvard University 1.36ms from Boston, US
128.103.249.65 AS1742 Harvard University 1.36ms from Boston, US
140.247.174.44 AS1742 Harvard University 3.39ms from Boston, US
140.247.136.113 AS1742 Harvard University 1.34ms from Boston, US
140.247.196.76 AS1742 Harvard University 1.75ms from Boston, US
131.142.21.11 AS1742 Harvard University 1.66ms from Boston, US
140.247.140.250 AS1742 Harvard University 1.42ms from Boston, US
128.103.250.193 AS1742 Harvard University 1.45ms from Boston, US
128.103.219.1 AS1742 Harvard University 1.34ms from Boston, US
140.247.22.4 AS1742 Harvard University 1.40ms from Boston, US
128.103.97.1 AS1742 Harvard University 1.35ms from Boston, US
192.5.66.161 AS1742 Harvard University 1.58ms from Boston, US
199.94.62.3 AS1742 Harvard University 3.79ms from Boston, US
128.103.94.1 AS1742 Harvard University 1.15ms 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
67.0.71.94 AS209 CenturyLink Communications, LLC 11.74ms from Albuquerque, US
169.252.27.254 AS6966 U.S. Department of State 4.84ms from Ashburn, US
210.246.212.254 AS23884 Proen Corp Public Company Limited. 0.41ms from Bangkok, TH
122.151.177.142 AS9443 Vocus Retail 3.09ms from Brisbane, AU
163.237.248.14 AS19255 YOUR.ORG, INC. 0.36ms from Chicago, US
173.189.222.238 AS7029 Windstream Communications LLC 12.59ms from Chicago, US
98.100.42.222 AS10796 Charter Communications Inc 11.35ms from Columbus, US
178.25.190.254 AS3209 Vodafone GmbH 1.69ms from Frankfurt am Main, DE
187.192.232.46 AS8151 UNINET 0.99ms from Guadalajara, MX
112.90.216.14 AS134543 China Unicom Guangdong IP network 3.88ms from Guangzhou, CN
220.186.56.190 AS4134 CHINANET-BACKBONE 11.89ms from Hangzhou, CN
165.84.179.254 AS10103 HK Broadband Network Ltd. 0.86ms from Hong Kong, HK
41.160.78.158 AS36937 Liquid Telecommunications South Africa (Pty) Ltd 1.16ms from Johannesburg, ZA
115.135.173.254 AS4788 TM TECHNOLOGY SERVICES SDN. BHD. 1.62ms from Kuala Lumpur, MY
68.5.13.46 AS22773 Cox Communications Inc. 5.06ms from Los Angeles, US
185.110.69.158 AS12357 VODAFONE ESPANA S.A.U. 12.85ms from Madrid, ES
151.95.63.78 AS1267 WIND TRE S.P.A. 10.13ms from Milan, IT
176.210.74.222 AS12389 PJSC Rostelecom 8.21ms from Novosibirsk, RU
187.10.144.126 AS27699 TELEFÔNICA BRASIL S.A 4.97ms from Osasco, BR
86.213.85.238 AS3215 Orange S.A. 15.31ms from Paris, FR
144.22.237.174 AS31898 Oracle Corporation 0.27ms from Sao Paulo, BR
32.220.206.174 AS46690 Southern New England Telephone Company and SNET America, Inc. 3.55ms from Secaucus, US
118.63.122.254 AS4766 Korea Telecom 2.18ms from Seoul, KR
79.136.112.110 AS8473 Bahnhof AB 0.73ms from Stockholm, SE
123.240.99.190 AS131596 TBC 3.20ms from Taipei, TW

Traceroute

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

$
traceroute -a -n -q1 -f4 -m13 131.142.236.16
traceroute to 131.142.236.16 (131.142.236.16): 13 hops max, 52 byte packets
4 [AS3257] 89.149.129.194 110.88 ms
5 *
6 [AS174] 154.54.3.125 3.692 ms
7 [AS174] 154.54.46.33 10.673 ms
8 [AS174] 38.104.186.114 9.339 ms
9 [AS1742] 128.103.0.161 11.666 ms
10 [AS1742] 128.103.0.134 9.487 ms
11 *
12 *
13 *
Measurement taken from IPinfo ProbeNet in Allentown, 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 AS1742 at robtex.

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