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
140.247.83.42 AS1742 Harvard University 1.48ms from Boston, US
140.247.185.97 AS1742 Harvard University 1.21ms from Boston, US
140.247.141.129 AS1742 Harvard University 1.26ms from Boston, US
140.247.74.46 AS1742 Harvard University 1.26ms from Boston, US
199.94.60.1 AS1742 Harvard University 3.34ms from Boston, US
128.103.182.31 AS1742 Harvard University 1.34ms from Boston, US
140.247.139.241 AS1742 Harvard University 1.44ms from Boston, US
140.247.123.110 AS1742 Harvard University 1.23ms from Boston, US
140.247.179.152 AS1742 Harvard University 3.48ms from Boston, US
128.103.105.1 AS1742 Harvard University 1.42ms from Boston, US
2607:fb60:a:1::d AS1742 Harvard University 5.38ms from New York City, US
140.247.234.193 AS1742 Harvard University 1.54ms from Boston, US
140.247.122.95 AS1742 Harvard University 1.23ms from Boston, US
140.247.171.225 AS1742 Harvard University 1.40ms from Boston, US
128.103.172.180 AS1742 Harvard University 1.50ms from Boston, US
140.247.198.193 AS1742 Harvard University 1.21ms from Boston, US
2607:fb60:37:1::1 AS1742 Harvard University 5.59ms from New York City, US
131.142.21.11 AS1742 Harvard University 1.84ms from Providence, US
128.103.134.1 AS1742 Harvard University 1.38ms from Boston, US
140.247.114.12 AS1742 Harvard University 1.51ms from Boston, US
140.247.85.31 AS1742 Harvard University 1.36ms from Boston, US
140.247.117.47 AS1742 Harvard University 1.45ms from Boston, US
140.247.170.137 AS1742 Harvard University 1.33ms from Boston, US
128.103.238.1 AS1742 Harvard University 1.22ms from Boston, US
128.103.170.121 AS1742 Harvard University 1.32ms 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
108.228.39.222 AS7018 AT&T Enterprises, LLC 4.90ms from Atlanta, US
122.151.177.142 AS9443 Vocus Retail 2.45ms from Brisbane, AU
18.188.160.126 AS16509 Amazon.com, Inc. 0.15ms from Columbus, US
65.70.98.94 AS7018 AT&T Enterprises, LLC 7.88ms from Dallas, US
12.47.214.174 AS7018 AT&T Enterprises, LLC 0.93ms from Dallas, US
63.229.231.254 AS209 CenturyLink Communications, LLC 3.48ms from Denver, US
185.164.229.254 AS203836 Net at vision Gesellschaft fuer Informationstechnologie mbH 0.40ms from Frankfurt am Main, DE
31.18.149.254 AS3209 Vodafone GmbH 2.11ms from Hamburg, DE
39.170.74.254 AS56041 China Mobile communications corporation 3.63ms from Hangzhou, CN
87.238.103.14 AS8491 Scientific-Production Enterprise Business Sviaz Holding LLC 1.07ms from Moscow, RU
45.195.107.110 AS20326 TeraSwitch Networks Inc. 1.03ms from New York City, US
37.195.59.126 AS31200 Novotelecom Ltd 1.59ms from Novosibirsk, RU
210.152.136.94 AS4694 IDC Frontier Inc. 6.66ms from Osaka, JP
27.221.247.222 AS4837 CHINA UNICOM China169 Backbone 7.37ms from Qingdao, CN
212.118.151.46 AS25019 Saudi Telecom Company JSC 1.52ms from Riyadh, SA
121.154.218.254 AS4766 Korea Telecom 5.54ms from Seoul, KR
210.223.85.94 AS4766 Korea Telecom 1.13ms from Seoul, KR
24.171.46.126 AS20115 Charter Communications LLC 5.88ms from St. Louis, US
218.161.67.206 AS3462 Data Communication Business Group 1.07ms from Taichung, TW
105.110.254.78 AS36947 Telecom Algeria 12.12ms from Algiers, DZ
99.25.113.30 AS7018 AT&T Enterprises, LLC 9.34ms from Atlanta, US
41.42.52.62 AS8452 TE-AS 2.65ms from Cairo, EG
70.59.195.78 AS209 CenturyLink Communications, LLC 2.55ms from Denver, US
63.225.5.254 AS209 CenturyLink Communications, LLC 8.59ms from Denver, US
95.89.169.254 AS3209 Vodafone GmbH 2.31ms from Frankfurt am Main, DE

Traceroute

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

$
traceroute -a -n -q1 -f5 -m15 131.142.94.45
traceroute to 131.142.94.45 (131.142.94.45): 15 hops max, 52 byte packets
5 [AS174] 154.54.61.193 1.155 ms
6 *
7 *
8 [AS174] 130.117.51.41 8.641 ms
9 [AS174] 154.54.74.166 8.678 ms
10 [AS174] 154.54.94.45 71.913 ms
11 [AS174] 38.104.186.114 79.55 ms
12 [AS1742] 128.103.0.1 79.693 ms
13 *
14 *
15 *
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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