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 84,185,967,300,503,932,245,900,000,000
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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IP Ranges API

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 ██████████ 101
128.103.64.74 ████████ 90
199.94.63.6 ██████████ 10
131.142.21.11 ██████████ 8
65.112.0.71 ██████████ 4
131.142.21.12 ██████████ 3
140.247.63.234 ██████████ 3
140.247.173.125 █████████ 3
128.103.109.12 ██████████ 3
128.103.124.40 ██████████ 3

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Peers

There are 8 peers for this ASN.

Peers Name
AS10578 Harvard University
AS11164 Internet2
AS11537 Internet2
AS1239 Cogent Communications, LLC
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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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

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

IP Address ASN Details
128.103.94.1 AS1742 Harvard University 1.11ms from Boston, US
128.103.228.1 AS1742 Harvard University 1.22ms from Boston, US
128.103.250.193 AS1742 Harvard University 1.33ms from Boston, US
140.247.212.135 AS1742 Harvard University 1.28ms from Boston, US
128.103.9.193 AS1742 Harvard University 1.32ms from Boston, US
128.103.38.165 AS1742 Harvard University 0.91ms from Boston, US
140.247.110.151 AS1742 Harvard University 1.29ms from Boston, US
140.247.149.117 AS1742 Harvard University 1.39ms from Boston, US
140.247.91.155 AS1742 Harvard University 1.26ms from Boston, US
128.103.185.1 AS1742 Harvard University 1.19ms from Boston, US
128.103.216.1 AS1742 Harvard University 1.16ms from Boston, US
2607:fb60:37:1::1 AS1742 Harvard University 2.47ms from Springfield, US
140.247.182.82 AS1742 Harvard University 1.30ms from Boston, US
140.247.25.65 AS1742 Harvard University 1.29ms from Boston, US
128.103.19.1 AS1742 Harvard University 1.29ms from Boston, US
128.103.6.244 AS1742 Harvard University 0.98ms from Boston, US
140.247.117.47 AS1742 Harvard University 1.25ms from Boston, US
140.247.26.72 AS1742 Harvard University 1.79ms from Boston, US
140.247.118.227 AS1742 Harvard University 1.29ms from Boston, US
128.103.37.153 AS1742 Harvard University 1.29ms from Boston, US
128.103.235.1 AS1742 Harvard University 1.36ms from Boston, US
140.247.108.230 AS1742 Harvard University 1.33ms from Boston, US
128.103.251.248 AS1742 Harvard University 1.42ms from Boston, US
140.247.16.98 AS1742 Harvard University 1.30ms from Boston, US
128.103.179.1 AS1742 Harvard University 1.27ms 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
71.210.182.254 AS19901 Brightspeed 8.36ms from Ashburn, US
20.51.176.30 AS8075 Microsoft Corporation 0.34ms from Ashburn, US
114.251.232.190 AS4808 China Unicom Beijing Province Network 3.48ms from Beijing, CN
164.41.44.78 AS21506 Fundação Universidade de Brasília 0.59ms from Brasilia, BR
175.12.9.206 AS151823 China Telecom 1.54ms from Changsha, CN
65.70.98.94 AS7018 AT&T Enterprises, LLC 7.87ms from Dallas, US
63.225.5.254 AS209 CenturyLink Communications, LLC 8.05ms from Denver, US
59.148.143.62 AS9269 Hong Kong Broadband Network Ltd. 1.47ms from Hong Kong, HK
118.129.101.254 AS3786 LG DACOM Corporation 2.24ms from Incheon, KR
118.100.25.254 AS4788 TM TECHNOLOGY SERVICES SDN. BHD. 4.23ms from Kuala Lumpur, MY
162.237.80.238 AS7018 AT&T Enterprises, LLC 6.70ms from San Antonio, US
4.151.222.110 AS8075 Microsoft Corporation 0.15ms from San Antonio, US
173.164.177.158 AS7922 Comcast Cable Communications, LLC 5.69ms from San Jose, US
189.155.233.190 AS8151 UNINET 14.15ms from Santiago de Queretaro, MX
200.153.162.62 AS27699 TELEFÔNICA BRASIL S.A 1.42ms from Sao Paulo, BR
49.56.148.254 AS4766 Korea Telecom 1.53ms from Seoul, KR
120.25.146.46 AS37963 Hangzhou Alibaba Advertising Co.,Ltd. 1.70ms from Shenzhen, CN
92.61.235.14 AS205209 Bynet business 1.40ms from Tel Aviv, IL
77.35.48.62 AS12389 PJSC Rostelecom 0.94ms from Vladivostok, RU
185.119.31.62 AS197731 The Internet Engineering Group B.V. 0.58ms from Amsterdam, NL
91.248.47.126 AS9145 EWE TEL GmbH 5.67ms from Amsterdam, NL
61.181.37.78 AS4837 CHINA UNICOM China169 Backbone 6.29ms from Beijing, CN
89.155.239.254 AS2860 NOS COMUNICACOES, S.A. 5.40ms from Braga, PT
186.233.154.254 AS263076 Universidade Estadual de Maringá - UEM 7.09ms from Curitiba, BR
75.173.10.254 AS19901 Brightspeed 4.50ms from Dallas, US

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 140.247.191.253
traceroute to 140.247.191.253 (140.247.191.253): 6 hops max, 52 byte packets
2 [AS58061] 38.180.36.1 0.229 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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