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
128.103.0.178 AS1742 Harvard University 1.05ms from Boston, US
128.103.101.1 AS1742 Harvard University 1.29ms from Boston, US
128.103.137.1 AS1742 Harvard University 1.13ms from Boston, US
128.103.177.42 AS1742 Harvard University 1.42ms from Boston, US
140.247.185.97 AS1742 Harvard University 1.21ms from Boston, US
128.103.27.14 AS1742 Harvard University 1.34ms from Boston, US
140.247.189.118 AS1742 Harvard University 1.58ms from Boston, US
2607:fb60:1010:2171::52 AS1742 Harvard University 5.48ms from New York City, US
128.103.201.21 AS1742 Harvard University 0.87ms from Boston, US
128.103.229.193 AS1742 Harvard University 1.27ms from Boston, US
140.247.29.64 AS1742 Harvard University 1.63ms from Boston, US
128.103.19.1 AS1742 Harvard University 1.36ms from Boston, US
140.247.183.7 AS1742 Harvard University 1.52ms from Boston, US
192.5.66.161 AS1742 Harvard University 1.52ms from Boston, US
128.103.138.1 AS1742 Harvard University 1.48ms from Boston, US
128.103.215.1 AS1742 Harvard University 1.37ms from Boston, US
140.247.149.117 AS1742 Harvard University 1.47ms from Boston, US
128.103.204.1 AS1742 Harvard University 1.37ms from Boston, US
128.103.99.1 AS1742 Harvard University 1.17ms from Boston, US
140.247.118.227 AS1742 Harvard University 1.36ms from Boston, US
140.247.96.206 AS1742 Harvard University 1.26ms from Boston, US
140.247.107.185 AS1742 Harvard University 1.36ms from Boston, US
128.103.216.1 AS1742 Harvard University 1.28ms from Boston, US
140.247.208.222 AS1742 Harvard University 2.21ms from Boston, US
128.103.214.1 AS1742 Harvard University 1.22ms 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
75.170.153.254 AS19901 Brightspeed 9.30ms from Ashburn, US
23.25.106.238 AS7922 Comcast Cable Communications, LLC 6.36ms from Ashburn, US
47.36.247.62 AS20115 Charter Communications LLC 19.29ms from Atlanta, US
73.227.227.190 AS7922 Comcast Cable Communications, LLC 8.81ms from Boston, US
222.160.171.254 AS4837 CHINA UNICOM China169 Backbone 5.94ms from Changchun, CN
162.221.75.94 AS26167 Markley Boston LLC 1.57ms from Dallas, US
32.112.159.94 AS2686 AT&T Enterprises, LLC 0.89ms from Frankfurt am Main, DE
186.66.55.110 AS14522 SERVICIOS DE TELECOMUNICACIONES SETEL S.A. (XTRIM EC) 5.86ms from Guayaquil, EC
31.18.149.254 AS3209 Vodafone GmbH 2.11ms from Hamburg, DE
115.206.122.254 AS4134 CHINANET-BACKBONE 6.81ms from Hangzhou, CN
114.5.239.254 AS4761 INDOSAT Internet Network Provider 1.55ms from Jakarta, ID
185.157.186.14 AS202658 CITY FIBER SL 10.06ms from Madrid, ES
46.72.160.254 AS12714 PJSC MegaFon 9.37ms from Moscow, RU
175.131.170.206 AS2516 KDDI CORPORATION 8.35ms from Osaka, JP
52.67.60.238 AS16509 Amazon.com, Inc. 0.17ms from Osasco, BR
179.160.55.238 AS26599 TELEFÔNICA BRASIL S.A 2.14ms from Osasco, BR
3.223.99.222 AS14618 Amazon.com, Inc. 0.23ms from Reston, US
87.228.123.254 AS49505 JSC Selectel 1.28ms from Saint Petersburg, RU
172.11.233.46 AS7018 AT&T Enterprises, LLC 12.09ms from San Jose, US
61.70.132.254 AS9416 Hoshin Multimedia Center Inc. 4.18ms from Taipei, TW
219.69.75.254 AS9416 Hoshin Multimedia Center Inc. 5.93ms from Taipei, TW
46.120.60.126 AS12400 Partner Communications Ltd. 1.02ms from Tel Aviv, IL
18.177.7.190 AS16509 Amazon.com, Inc. 0.19ms from Tokyo, JP
20.116.98.158 AS8075 Microsoft Corporation 0.16ms from Toronto, CA
212.49.119.222 AS12668 LLC "KomTehCentr" 0.30ms from Yekaterinburg, RU

Traceroute

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

$
traceroute -a -n -q1 -f4 -m10 131.142.136.36
traceroute to 131.142.136.36 (131.142.136.36): 10 hops max, 52 byte packets
4 [AS3356] 4.31.157.126 77.009 ms
5 [AS1742] 128.103.0.1 77.205 ms
6 [AS1742] 140.247.3.62 77.169 ms
7 [AS1742] 128.103.252.90 76.857 ms
8 *
9 *
10 *
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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