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 320
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 320 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
140.247.173.13 ██████████ 3
128.103.109.12 ██████████ 3
140.247.173.125 █████████ 3
128.103.124.40 ██████████ 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

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

IP Address ASN Details
140.247.84.36 AS1742 Harvard University 1.28ms from Boston, US
128.103.225.1 AS1742 Harvard University 1.25ms from Boston, US
128.103.37.149 AS1742 Harvard University 1.19ms from Boston, US
131.142.198.127 AS1742 Harvard University 1.50ms from Boston, US
140.247.172.126 AS1742 Harvard University 1.45ms from Boston, US
128.103.253.135 AS1742 Harvard University 1.47ms from Boston, US
2607:fb60:2501:2177::100 AS1742 Harvard University 6.05ms from Piscataway, US
140.247.233.194 AS1742 Harvard University 0.89ms from Boston, US
140.247.170.137 AS1742 Harvard University 1.32ms from Boston, US
140.247.95.197 AS1742 Harvard University 1.41ms from Boston, US
140.247.105.14 AS1742 Harvard University 1.32ms from Boston, US
128.103.170.154 AS1742 Harvard University 1.38ms from Boston, US
199.94.61.22 AS1742 Harvard University 3.56ms from Boston, US
128.103.155.5 AS1742 Harvard University 1.99ms from Providence, US
128.103.109.139 AS1742 Harvard University 1.27ms from Boston, US
128.103.239.1 AS1742 Harvard University 1.35ms from Boston, US
140.247.91.129 AS1742 Harvard University 1.34ms from Boston, US
128.103.138.1 AS1742 Harvard University 1.43ms from Boston, US
128.103.142.1 AS1742 Harvard University 1.27ms from Boston, US
128.103.96.1 AS1742 Harvard University 1.43ms from Boston, US
140.247.69.190 AS1742 Harvard University 1.22ms from Boston, US
140.247.220.142 AS1742 Harvard University 6.30ms from Boston, US
128.103.196.16 AS1742 Harvard University 1.27ms from Boston, US
128.103.106.10 AS1742 Harvard University 1.32ms from Boston, US
140.247.182.136 AS1742 Harvard University 1.42ms 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
144.217.83.78 AS16276 OVH SAS 0.16ms from Beauharnois, CA
213.118.162.14 AS6848 Telenet BV 8.01ms from Brussels, BE
195.246.49.222 AS2561 Egyptian Universities Network (EUN) 6.20ms from Cairo, EG
18.117.94.78 AS16509 Amazon.com, Inc. 0.17ms from Columbus, US
12.47.214.174 AS7018 AT&T Enterprises, LLC 1.09ms from Dallas, US
58.22.5.142 AS4837 CHINA UNICOM China169 Backbone 8.09ms from Fuzhou, CN
116.48.34.254 AS4760 HKT Limited 0.84ms from Hong Kong, HK
108.79.19.206 AS7018 AT&T Enterprises, LLC 3.14ms from Houston, US
81.84.203.254 AS2860 NOS COMUNICACOES, S.A. 1.44ms from Lisbon, PT
83.231.210.238 AS2914 NTT America, Inc. 1.17ms from London, GB
62.232.156.62 AS5413 Wavenet Limited 1.63ms from London, GB
37.71.123.206 AS15557 Societe Francaise Du Radiotelephone - SFR SA 9.48ms from Lyon, FR
82.90.6.254 AS3269 Telecom Italia S.p.A. 2.05ms from Milan, IT
212.103.123.254 AS57044 JSC "ER-Telecom Holding" 8.44ms from Moscow, RU
186.73.177.126 AS11556 Cable & Wireless Panama 0.66ms from Panama, PA
116.128.219.14 AS17621 China Unicom Shanghai network 2.52ms from Shanghai, CN
120.197.98.142 AS56040 China Mobile communications corporation 5.37ms from Shenzhen, CN
222.222.3.30 AS4134 CHINANET-BACKBONE 1.40ms from Shijiazhuang, CN
27.84.241.190 AS2516 KDDI CORPORATION 4.84ms from Tokyo, JP
189.15.58.30 AS53006 ALGAR TELECOM S/A 5.42ms from Uberlandia, BR
173.53.38.238 AS701 Verizon Business 4.62ms from Ashburn, US
12.91.161.158 AS7018 AT&T Enterprises, LLC 5.59ms from Chicago, US
87.189.186.30 AS3320 Deutsche Telekom AG 3.88ms from Frankfurt am Main, DE
183.156.107.206 AS4134 CHINANET-BACKBONE 5.63ms from Hangzhou, CN
103.167.93.174 AS63737 VIETSERVER SERVICES TECHNOLOGY COMPANY LIMITED 0.14ms from Hanoi, VN

Traceroute

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

$
traceroute -a -n -q1 -f5 -m13 131.142.142.45
traceroute to 131.142.142.45 (131.142.142.45): 13 hops max, 52 byte packets
5 [AS19978] 8.243.248.13 14.272 ms
6 *
7 [AS3356] 4.31.157.126 50.204 ms
8 [AS1742] 128.103.0.1 50.148 ms
9 [AS1742] 140.247.3.62 50.456 ms
10 [AS1742] 128.103.252.90 49.979 ms
11 *
12 *
13 *
Measurement taken from IPinfo ProbeNet in Caracas, VE
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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