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 323
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 323 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
140.247.173.125 █████████ 3
140.247.173.13 ██████████ 3
128.103.109.12 ██████████ 3
140.247.63.234 ██████████ 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

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

IP Address ASN Details
140.247.109.31 AS1742 Harvard University 1.29ms from Boston, US
140.247.120.200 AS1742 Harvard University 1.41ms from Boston, US
140.247.197.222 AS1742 Harvard University 1.31ms from Boston, US
140.247.118.227 AS1742 Harvard University 1.40ms from Boston, US
128.103.176.90 AS1742 Harvard University 1.38ms from Boston, US
128.103.249.65 AS1742 Harvard University 1.35ms from Boston, US
128.103.214.1 AS1742 Harvard University 1.12ms from Boston, US
140.247.74.73 AS1742 Harvard University 1.31ms from Boston, US
140.247.107.185 AS1742 Harvard University 1.35ms from Boston, US
140.247.26.72 AS1742 Harvard University 1.53ms from Boston, US
128.103.239.1 AS1742 Harvard University 1.33ms from Boston, US
2607:fb60:2400:1::2 AS1742 Harvard University 6.10ms from New York City, US
128.103.235.1 AS1742 Harvard University 1.44ms from Boston, US
140.247.204.12 AS1742 Harvard University 1.51ms from Boston, US
128.103.181.35 AS1742 Harvard University 1.37ms from Boston, US
140.247.137.183 AS1742 Harvard University 1.40ms from Boston, US
128.103.6.241 AS1742 Harvard University 1.07ms from Boston, US
128.103.54.1 AS1742 Harvard University 1.34ms from Boston, US
128.103.234.70 AS1742 Harvard University 1.53ms from Boston, US
140.247.22.5 AS1742 Harvard University 1.19ms from Boston, US
2607:fb60:6:1002::2 AS1742 Harvard University 6.58ms from New York City, US
131.142.185.22 AS1742 Harvard University 1.92ms from Providence, US
128.103.162.10 AS1742 Harvard University 1.75ms from Providence, US
128.103.180.1 AS1742 Harvard University 1.38ms from Boston, US
140.247.136.113 AS1742 Harvard University 1.34ms 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
134.126.145.142 AS10357 James Madison University 4.50ms from Ashburn, US
61.181.37.78 AS4837 CHINA UNICOM China169 Backbone 5.68ms from Beijing, CN
52.26.244.110 AS16509 Amazon.com, Inc. 0.18ms from Boardman, US
190.55.63.94 AS27747 Telecentro S.A. 0.39ms from Buenos Aires, AR
34.61.229.78 AS396982 Google LLC 0.11ms from Council Bluffs, US
113.182.34.78 AS45899 VNPT Corp 5.45ms from Ho Chi Minh City, VN
38.212.15.62 AS4581 Socket Holdings Corporation 3.01ms from Kansas City, US
213.159.251.254 AS6703 PRIVATE JOINT-STOCK COMPANY "FARLEP-INVEST" 0.58ms from Kyiv, UA
20.40.62.110 AS8075 Microsoft Corporation 1.44ms from Lohogaon, IN
20.117.233.62 AS8075 Microsoft Corporation 0.36ms from London, GB
12.20.173.142 AS7018 AT&T Enterprises, LLC 2.49ms from Los Angeles, US
117.212.249.94 AS9829 National Internet Backbone 6.44ms from Mumbai, IN
210.156.127.254 AS23630 CAC Inc. 4.03ms from Osaka, JP
201.116.191.254 AS8151 UNINET 10.63ms from Santiago de Queretaro, MX
222.96.188.206 AS4766 Korea Telecom 7.29ms from Seoul, KR
210.111.163.158 AS9976 Namincheon Brodcasting Co., Ltd. 1.73ms from Seoul, KR
210.80.169.238 AS703 Verizon Business 0.81ms from Sydney, AU
118.163.147.254 AS3462 Data Communication Business Group 0.97ms from Taipei, TW
211.78.184.254 AS4780 Digital United Inc. 5.89ms from Taipei, TW
37.74.215.46 AS1136 KPN B.V. 13.21ms from Amsterdam, NL
147.95.136.254 AS8762 Hellenic Mediterranean University 5.72ms from Athens, GR
193.58.31.30 AS199541 EUROCONTROL, the European Organisation for the Safety of Air Navigation 3.09ms from Aubervilliers, FR
203.185.127.222 AS3836 Thai Social/Scientific, Academic and Research Network 0.93ms from Bangkok, TH
98.118.44.62 AS701 Verizon Business 2.01ms from Boston, US
18.161.236.142 AS16509 Amazon.com, Inc. 0.37ms from Chennai, IN

Traceroute

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

$
traceroute -a -n -q1 -f3 -m9 131.142.237.130
traceroute to 131.142.237.130 (131.142.237.130): 9 hops max, 52 byte packets
3 [AS3356] 4.69.209.78 19.161 ms
4 [AS3356] 4.31.157.126 24.463 ms
5 [AS1742] 128.103.0.161 24.817 ms
6 [AS1742] 128.103.0.134 24.313 ms
7 *
8 *
9 *
Measurement taken from IPinfo ProbeNet in Atlanta, 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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