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 319
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 319 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
131.142.21.12 ██████████ 3
128.103.124.40 ██████████ 3
140.247.173.125 █████████ 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

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

IP Address ASN Details
128.103.175.1 AS1742 Harvard University 1.19ms from Boston, US
140.247.200.238 AS1742 Harvard University 1.41ms from Boston, US
128.103.100.26 AS1742 Harvard University 1.25ms from Boston, US
128.103.107.142 AS1742 Harvard University 1.25ms from Boston, US
140.247.115.99 AS1742 Harvard University 1.63ms from Boston, US
140.247.189.118 AS1742 Harvard University 1.42ms from Boston, US
140.247.78.39 AS1742 Harvard University 1.34ms from Boston, US
131.142.18.202 AS1742 Harvard University 1.68ms from Boston, US
128.103.162.9 AS1742 Harvard University 1.82ms from Providence, US
128.103.234.70 AS1742 Harvard University 1.55ms from Boston, US
140.247.84.217 AS1742 Harvard University 1.33ms from Boston, US
140.247.3.134 AS1742 Harvard University 1.17ms from Boston, US
140.247.82.209 AS1742 Harvard University 1.51ms from Boston, US
128.103.138.1 AS1742 Harvard University 1.51ms from Boston, US
140.247.196.208 AS1742 Harvard University 1.40ms from Boston, US
2607:fb60:0:6:23::2 AS1742 Harvard University 5.88ms from New York City, US
140.247.168.210 AS1742 Harvard University 2.31ms from Providence, US
128.103.252.90 AS1742 Harvard University 1.54ms from Boston, US
140.247.114.135 AS1742 Harvard University 1.54ms from Boston, US
128.103.237.1 AS1742 Harvard University 1.35ms from Boston, US
140.247.76.98 AS1742 Harvard University 1.42ms from Boston, US
140.247.98.51 AS1742 Harvard University 1.34ms from Boston, US
140.247.220.142 AS1742 Harvard University 6.36ms from Boston, US
128.103.214.1 AS1742 Harvard University 1.20ms from Boston, US
128.103.6.244 AS1742 Harvard University 1.02ms 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
78.109.99.126 AS41897 Sat-Trakt D.O.O. 5.98ms from Belgrade, RS
34.133.0.110 AS396982 Google LLC 0.11ms from Council Bluffs, US
85.100.18.174 AS9121 Turk Telekomunikasyon Anonim Sirketi 8.18ms from Izmir, TR
85.54.114.254 AS12479 Orange Espagne SA 3.48ms from Madrid, ES
120.159.99.254 AS135887 Belong (Telstra Limited) 2.51ms from Melbourne, AU
75.72.124.206 AS7922 Comcast Cable Communications, LLC 4.35ms from Minneapolis, US
76.113.147.126 AS7922 Comcast Cable Communications, LLC 7.34ms from Minneapolis, US
193.160.208.46 AS9123 JSC "TIMEWEB" 0.72ms from Moscow, RU
176.197.4.110 AS39927 E-Light-Telecom Ltd. 7.25ms from Novosibirsk, RU
187.39.64.62 AS28573 Claro NXT Telecomunicacoes Ltda 7.58ms from Osasco, BR
189.17.132.14 AS4230 CLARO S.A. 11.62ms from Rio de Janeiro, BR
64.88.245.30 AS29789 Reflected Networks, Inc. 0.13ms from Seattle, US
210.182.34.126 AS3786 LG DACOM Corporation 4.32ms from Seoul, KR
121.170.185.126 AS4766 Korea Telecom 1.06ms from Seoul, KR
183.126.92.126 AS4766 Korea Telecom 1.76ms from Seoul, KR
49.27.229.62 AS4766 Korea Telecom 7.88ms from Seoul, KR
193.193.80.126 AS8323 Academic Computer Centre CYFRONET AGH 4.78ms from Warsaw, PL
96.91.254.206 AS7922 Comcast Cable Communications, LLC 7.51ms from Washington, US
94.65.248.110 AS6799 Ote SA (Hellenic Telecommunications Organisation) 12.90ms from Athens, GR
219.236.136.126 AS17429 BEIJING GEHUA CATV NETWORK CO.LTD 10.39ms from Beijing, CN
40.142.27.78 AS17378 TierPoint, LLC 0.74ms from Chicago, US
71.222.235.254 AS19901 Brightspeed 11.61ms from Chicago, US
50.206.80.46 AS7922 Comcast Cable Communications, LLC 1.32ms from Denver, US
45.183.132.142 AS267501 Equatorial Telecomunicacoes LTDA 14.07ms from Fortaleza, BR
88.133.40.206 AS197524 Leonet GmbH 5.11ms 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 -m9 128.103.33.254
traceroute to 128.103.33.254 (128.103.33.254): 9 hops max, 52 byte packets
5 [AS3356] 4.68.75.221 0.45 ms
6 [AS3356] 4.69.209.78 19.31 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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