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
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
AS3549 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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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
128.103.219.1 AS1742 Harvard University 1.32ms from Boston, US
140.247.108.230 AS1742 Harvard University 1.35ms from Boston, US
140.247.116.204 AS1742 Harvard University 1.45ms from Boston, US
128.103.253.129 AS1742 Harvard University 1.44ms from Boston, US
140.247.100.253 AS1742 Harvard University 1.41ms from Boston, US
140.247.3.134 AS1742 Harvard University 1.15ms from Boston, US
128.103.28.1 AS1742 Harvard University 1.40ms from Boston, US
128.103.185.1 AS1742 Harvard University 1.22ms from Boston, US
128.103.4.1 AS1742 Harvard University 1.39ms from Boston, US
140.247.140.249 AS1742 Harvard University 1.51ms from Boston, US
140.247.78.39 AS1742 Harvard University 1.25ms from Boston, US
131.142.105.153 AS1742 Harvard University 2.93ms from Boston, US
128.103.100.1 AS1742 Harvard University 1.33ms from Boston, US
128.103.215.1 AS1742 Harvard University 1.31ms from Boston, US
128.103.134.1 AS1742 Harvard University 1.45ms from Boston, US
140.247.84.36 AS1742 Harvard University 1.26ms from Boston, US
140.247.74.46 AS1742 Harvard University 1.31ms from Boston, US
128.103.178.1 AS1742 Harvard University 1.16ms from Boston, US
140.247.185.97 AS1742 Harvard University 1.16ms from Boston, US
140.247.83.11 AS1742 Harvard University 1.43ms from Boston, US
128.103.93.213 AS1742 Harvard University 1.24ms from Boston, US
140.247.197.141 AS1742 Harvard University 1.33ms from Boston, US
128.103.37.149 AS1742 Harvard University 1.16ms from Boston, US
128.103.216.1 AS1742 Harvard University 1.17ms from Boston, US
140.247.112.220 AS1742 Harvard University 1.25ms 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
203.49.61.14 AS1221 Telstra Limited 0.96ms from Adelaide, AU
52.44.89.142 AS14618 Amazon.com, Inc. 0.54ms from Ashburn, US
100.15.27.190 AS701 Verizon Business 2.24ms from Ashburn, US
91.66.76.254 AS3209 Vodafone GmbH 3.30ms from Berlin, DE
129.92.123.78 AS668 United States Department of Defense (DoD) 4.19ms from Chicago, US
103.90.0.254 AS132365 Bangladesh Agricultural University (BAU) 3.78ms from Dhaka, BD
91.53.6.142 AS3320 Deutsche Telekom AG 3.71ms from Frankfurt am Main, DE
90.232.70.30 AS3301 Telia Company AB 9.01ms from Goeteborg, SE
106.52.152.62 AS45090 Shenzhen Tencent Computer Systems Company Limited 2.26ms from Guangzhou, CN
101.128.94.254 AS135478 PT. Cyberindo Aditama 0.95ms from Jakarta, ID
101.255.43.238 AS38511 PT Remala Abadi 0.89ms from Jakarta, ID
125.161.111.30 AS7713 PT Telekomunikasi Indonesia 1.75ms from Jakarta, ID
90.52.134.126 AS3215 Orange S.A. 19.66ms from Lyon, FR
95.255.213.14 AS3269 Telecom Italia S.p.A. 4.48ms from Milan, IT
176.212.109.190 AS57044 JSC ER-Telecom Holding 8.58ms from Moscow, RU
79.164.92.222 AS8615 "Central Telegraph" Public Joint-stock Company 2.07ms from Moscow, RU
112.83.93.254 AS4837 CHINA UNICOM China169 Backbone 5.46ms from Nanjing, CN
202.93.153.94 AS45498 SMART AXIATA Co., Ltd. 0.52ms from Phnom Penh, KH
5.165.203.254 AS50543 JSC ER-Telecom Holding 6.12ms from Samara, RU
179.96.150.222 AS28634 Life Tecnologia Ltda. 8.20ms from Sao Paulo, BR
112.181.240.94 AS4766 Korea Telecom 1.79ms from Seoul, KR
118.33.146.190 AS4766 Korea Telecom 1.79ms from Seoul, KR
211.226.109.126 AS4766 Korea Telecom 1.59ms from Seoul, KR
219.74.45.254 AS9506 Singtel Fibre Broadband 1.47ms from Singapore, SG
39.187.215.46 AS56041 China Mobile communications corporation 7.28ms from Suzhou, CN

Traceroute

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

$
traceroute -a -n -q1 -f2 -m9 131.142.31.248
traceroute to 131.142.31.248 (131.142.31.248): 9 hops max, 52 byte packets
3 *
4 [AS3356] 4.31.157.126 77.525 ms
5 [AS1742] 128.103.0.78 77.763 ms
6 [AS1742] 140.247.2.62 78.134 ms
7 *
8 *
9 *
Measurement taken from IPinfo ProbeNet in Bogota, CO
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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