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
134.174.149.155 AS1742 Harvard University 11.16ms from Ashburn, US
140.247.140.250 AS1742 Harvard University 1.49ms from Boston, US
140.247.90.40 AS1742 Harvard University 1.35ms from Boston, US
140.247.183.214 AS1742 Harvard University 1.48ms from Boston, US
128.103.94.1 AS1742 Harvard University 1.14ms from Boston, US
140.247.29.229 AS1742 Harvard University 1.46ms from Boston, US
140.247.96.228 AS1742 Harvard University 1.28ms from Boston, US
2607:fb60:1010:2171::52 AS1742 Harvard University 5.85ms from New York City, US
128.103.101.1 AS1742 Harvard University 1.34ms from Boston, US
128.103.230.241 AS1742 Harvard University 1.24ms from Boston, US
128.103.106.10 AS1742 Harvard University 1.19ms from Boston, US
140.247.113.25 AS1742 Harvard University 1.57ms from Boston, US
140.247.184.64 AS1742 Harvard University 1.33ms from Boston, US
140.247.235.193 AS1742 Harvard University 1.19ms from Boston, US
140.247.114.12 AS1742 Harvard University 1.49ms from Boston, US
140.247.66.160 AS1742 Harvard University 1.58ms from Boston, US
140.247.152.28 AS1742 Harvard University 4.03ms from Providence, US
140.247.199.129 AS1742 Harvard University 1.24ms from Boston, US
140.247.89.23 AS1742 Harvard University 1.42ms from Boston, US
128.103.160.129 AS1742 Harvard University 1.24ms from Boston, US
128.103.93.213 AS1742 Harvard University 1.23ms from Boston, US
128.103.1.242 AS1742 Harvard University 0.82ms from Boston, US
128.103.96.18 AS1742 Harvard University 1.43ms from Boston, US
140.247.132.228 AS1742 Harvard University 1.31ms from Boston, US
140.247.179.176 AS1742 Harvard University 3.38ms 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
213.184.101.254 AS15435 DELTA Fiber Nederland B.V. 3.08ms from Amsterdam, NL
96.91.254.206 AS7922 Comcast Cable Communications, LLC 7.48ms from Ashburn, US
195.251.176.30 AS5408 National Infrastructures for Research and Technology S.A. 1.46ms from Athens, GR
108.228.39.222 AS7018 AT&T Enterprises, LLC 3.75ms from Atlanta, US
190.26.221.190 AS19429 ETB - Colombia 0.54ms from Bogota, CO
172.172.71.222 AS8075 Microsoft Corporation 0.23ms from Boydton, US
87.165.236.94 AS3320 Deutsche Telekom AG 8.30ms from Frankfurt am Main, DE
97.112.84.254 AS19901 Brightspeed 0.53ms from Kansas City, US
115.135.173.254 AS4788 TM TECHNOLOGY SERVICES SDN. BHD. 1.60ms from Kuala Lumpur, MY
97.163.75.222 AS6167 Verizon Business 17.01ms from Miami, US
95.255.213.14 AS3269 Telecom Italia S.p.A. 4.57ms from Milan, IT
109.194.239.30 AS42682 JSC "ER-Telecom Holding" 6.36ms from Moscow, RU
212.103.123.254 AS57044 JSC "ER-Telecom Holding" 8.56ms from Moscow, RU
47.36.247.62 AS20115 Charter Communications LLC 19.30ms from Murfreesboro, US
112.83.93.254 AS4837 CHINA UNICOM China169 Backbone 6.31ms from Nanjing, CN
112.3.27.30 AS56046 China Mobile communications corporation 4.39ms from Nanjing, CN
192.231.29.30 AS397087 Mississippi University for Women 11.25ms from New Orleans, US
191.13.240.78 AS27699 TELEFÔNICA BRASIL S.A 3.34ms from Osasco, BR
2.10.85.190 AS3215 Orange S.A. 8.10ms from Paris, FR
204.195.39.174 AS11404 Wave Broadband 6.88ms from Portland, US
13.219.138.222 AS14618 Amazon.com, Inc. 0.21ms from Reston, US
183.127.148.254 AS4766 Korea Telecom 6.10ms from Seoul, KR
175.244.149.14 AS4766 Korea Telecom 5.30ms from Seoul, KR
61.221.226.254 AS3462 Data Communication Business Group 1.47ms from Taichung, TW
125.227.11.254 AS3462 Data Communication Business Group 1.94ms 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 -f2 -m6 140.247.5.155
traceroute to 140.247.5.155 (140.247.5.155): 6 hops max, 52 byte packets
2 [AS58061] 38.180.36.1 0.387 ms
4 *
5 *
6 *
Measurement taken from IPinfo ProbeNet in Almaty, KZ
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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