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 84,185,967,300,503,931,839,013,978,112
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
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 ██████████ 104
128.103.64.74 ████████ 93
199.94.63.6 ██████████ 11
131.142.21.11 ██████████ 8
131.142.21.13 ██████████ 5
65.112.0.71 ██████████ 4
140.247.63.234 ██████████ 3
128.103.109.12 ██████████ 3
140.247.173.13 ██████████ 3
131.142.21.12 ██████████ 3

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Peers

There are 7 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
AS40127 Longwood Medical and Academic Area (LMA)
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ASN API & Database

Upstreams

There are 4 upstreams for this ASN.

upstreams Name
AS10578 Harvard University
AS11164 Internet2
AS174 Cogent Communications, LLC
AS3356 Level 3 Parent, LLC
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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

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

IP Address ASN Details
140.247.134.252 AS1742 Harvard University 1.29ms from Boston, US
140.247.115.99 AS1742 Harvard University 1.66ms from Boston, US
140.247.234.193 AS1742 Harvard University 1.54ms from Boston, US
140.247.135.35 AS1742 Harvard University 1.45ms from Boston, US
128.103.162.10 AS1742 Harvard University 1.33ms from Boston, US
140.247.196.208 AS1742 Harvard University 1.51ms from Boston, US
128.103.179.1 AS1742 Harvard University 1.29ms from Boston, US
140.247.231.225 AS1742 Harvard University 1.25ms from Boston, US
140.247.139.241 AS1742 Harvard University 1.44ms from Boston, US
128.103.177.42 AS1742 Harvard University 1.42ms from Boston, US
2607:fb60:fe10:200::2 AS1742 Harvard University 5.87ms from New York City, US
128.103.205.1 AS1742 Harvard University 11.17ms from Ashburn, US
128.103.225.1 AS1742 Harvard University 1.18ms from Boston, US
140.247.162.154 AS1742 Harvard University 1.45ms from Boston, US
140.247.64.65 AS1742 Harvard University 1.52ms from Boston, US
140.247.140.250 AS1742 Harvard University 1.52ms from Boston, US
140.247.117.47 AS1742 Harvard University 1.45ms from Boston, US
140.247.29.64 AS1742 Harvard University 1.63ms from Boston, US
2607:fb60:2406:8::1021 AS1742 Harvard University 6.46ms from New York City, US
2607:fb60:a:1::d AS1742 Harvard University 5.38ms from New York City, US
128.103.235.1 AS1742 Harvard University 1.40ms from Boston, US
140.247.128.23 AS1742 Harvard University 1.36ms from Boston, US
128.103.208.1 AS1742 Harvard University 1.16ms from Boston, US
128.103.90.1 AS1742 Harvard University 1.34ms from Boston, US
128.103.124.50 AS1742 Harvard University 2.82ms 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
46.17.100.94 AS57043 HOSTKEY B.V. 0.41ms from Amsterdam, NL
34.80.130.238 AS396982 Google LLC 0.17ms from Chang-hua, TW
20.218.197.142 AS8075 Microsoft Corporation 0.28ms from Frankfurt am Main, DE
20.170.102.190 AS8075 Microsoft Corporation 0.28ms from Frankfurt am Main, DE
77.22.94.254 AS3209 Vodafone GmbH 5.18ms from Hamburg, DE
183.98.72.254 AS4766 Korea Telecom 1.37ms from Incheon, KR
104.15.110.78 AS7018 AT&T Enterprises, LLC 2.75ms from Miami, US
93.189.16.254 AS41829 Regionset Ltd 13.15ms from Moscow, RU
69.203.117.78 AS12271 Charter Communications Inc 6.94ms from New York City, US
90.91.111.110 AS3215 Orange S.A. 2.80ms from Paris, FR
86.213.85.238 AS3215 Orange S.A. 15.09ms from Paris, FR
162.206.243.126 AS7018 AT&T Enterprises, LLC 12.02ms from San Jose, US
50.245.135.62 AS7922 Comcast Cable Communications, LLC 4.15ms from Seattle, US
173.220.60.94 AS6128 Cablevision Systems Corp. 7.20ms from Secaucus, US
210.95.118.254 AS4766 Korea Telecom 5.96ms from Seoul, KR
14.94.196.158 AS4766 Korea Telecom 1.91ms from Seoul, KR
122.194.67.254 AS4837 CHINA UNICOM China169 Backbone 7.12ms from Shanghai, CN
58.4.43.62 AS17506 ARTERIA Networks Corporation 0.90ms from Tokyo, JP
221.170.140.46 AS2518 BIGLOBE Inc. 8.02ms from Tokyo, JP
81.204.226.46 AS1136 KPN B.V. 1.57ms from Amsterdam, NL
173.53.38.238 AS701 Verizon Business 4.34ms from Ashburn, US
208.214.101.254 AS701 Verizon Business 0.46ms from Ashburn, US
3.161.190.158 AS16509 Amazon.com, Inc. 0.22ms from Atlanta, US
155.48.29.110 AS16481 Babson College 3.83ms from Boston, US
190.103.1.238 AS13316 SES Sistemas Electrónicos S.A. 1.89ms from Buenos Aires, AR

Traceroute

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

$
traceroute -a -n -q1 -f5 -m12 131.142.192.191
traceroute to 131.142.192.191 (131.142.192.191): 12 hops max, 52 byte packets
6 *
7 [AS3356] 4.31.157.126 81.397 ms
8 [AS1742] 128.103.0.161 82.56 ms
9 [AS1742] 128.103.0.134 81.658 ms
10 *
11 *
12 *
Measurement taken from IPinfo ProbeNet in Amsterdam, NL
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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