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
128.103.64.0/24 Harvard University 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 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
128.103.124.40 ██████████ 3

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Peers

There are 10 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
AS3549 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
128.103.173.1 AS1742 Harvard University 1.45ms from Boston, US
128.103.109.1 AS1742 Harvard University 1.28ms from Boston, US
140.247.3.134 AS1742 Harvard University 1.17ms from Boston, US
128.103.248.225 AS1742 Harvard University 1.02ms from Boston, US
140.247.171.225 AS1742 Harvard University 1.36ms from Boston, US
128.103.37.153 AS1742 Harvard University 1.27ms from Boston, US
128.103.211.254 AS1742 Harvard University 1.35ms from Boston, US
131.142.21.11 AS1742 Harvard University 1.44ms from Boston, US
140.247.90.40 AS1742 Harvard University 1.35ms from Boston, US
128.103.185.1 AS1742 Harvard University 1.20ms from Boston, US
140.247.97.235 AS1742 Harvard University 1.36ms from Boston, US
140.247.137.183 AS1742 Harvard University 1.39ms from Boston, US
2607:fb60:2501:2177::100 AS1742 Harvard University 5.51ms from New York City, US
128.103.100.1 AS1742 Harvard University 1.29ms from Boston, US
128.103.99.1 AS1742 Harvard University 1.23ms from Boston, US
128.103.197.1 AS1742 Harvard University 1.23ms from Boston, US
128.103.1.242 AS1742 Harvard University 0.84ms from Boston, US
140.247.85.31 AS1742 Harvard University 1.36ms from Boston, US
140.247.136.113 AS1742 Harvard University 1.33ms from Boston, US
140.247.174.89 AS1742 Harvard University 3.37ms from Boston, US
128.103.204.1 AS1742 Harvard University 1.39ms from Boston, US
128.103.171.1 AS1742 Harvard University 1.36ms from Boston, US
140.247.87.100 AS1742 Harvard University 2.13ms from Providence, US
128.103.97.1 AS1742 Harvard University 1.30ms from Boston, US
199.94.62.3 AS1742 Harvard University 3.78ms 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
108.142.24.158 AS8075 Microsoft Corporation 0.22ms from Amsterdam, NL
174.19.120.254 AS19901 Brightspeed 10.39ms from Ashburn, US
91.66.76.254 AS3209 Vodafone GmbH 2.75ms from Berlin, DE
164.41.44.78 AS21506 Fundação Universidade de Brasília 0.66ms from Brasilia, BR
70.119.108.190 AS11427 Charter Communications Inc 5.28ms from Dallas, US
61.142.255.174 AS4134 CHINANET-BACKBONE 3.17ms from Guangzhou, CN
85.182.237.158 AS6805 Telefonica Germany GmbH & Co.OHG 2.24ms from Hamburg, DE
211.198.89.254 AS4766 Korea Telecom 0.92ms from Incheon, KR
192.26.9.30 AS1315 Imperial PFS 0.67ms from Kansas City, US
92.176.130.254 AS12479 Orange Espagne SA 11.88ms from Madrid, ES
45.140.163.254 AS205341 SEDE SISTEMAS Y COMUNICACIONES S.L. 8.16ms from Madrid, ES
120.159.99.254 AS135887 Belong (Telstra Limited) 2.62ms from Melbourne, AU
95.86.117.174 AS42925 Internet Rimon LTD 0.41ms from Petaẖ Tiqva, IL
209.180.144.254 AS209 CenturyLink Communications, LLC 1.22ms from Phoenix, US
189.171.122.30 AS8151 UNINET 3.27ms from Santiago de Queretaro, MX
45.134.20.78 AS396356 Latitude.sh 0.27ms from Sydney, AU
210.243.121.158 AS9924 Taiwan Fixed Network, Telco and Network Service Provider. 1.16ms from Taipei, TW
62.108.181.126 AS28678 Technical University of Koszalin 11.97ms from Warsaw, PL
182.127.138.30 AS4837 CHINA UNICOM China169 Backbone 1.51ms from Zhengzhou, CN
104.239.110.14 AS212238 Datacamp Limited 1.01ms from Amsterdam, NL
136.47.156.238 AS16591 Google Fiber Inc. 6.89ms from Ashburn, US
192.144.152.174 AS45090 Shenzhen Tencent Computer Systems Company Limited 1.76ms from Beijing, CN
75.176.63.78 AS11426 Charter Communications Inc 5.68ms from Charlotte, US
185.29.219.174 AS60522 KomMITT-Ratingen GmbH 0.45ms from Duesseldorf, DE
91.53.6.142 AS3320 Deutsche Telekom AG 3.75ms 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 -f4 140.247.3.191
traceroute to 140.247.3.191 (140.247.3.191): 64 hops max, 52 byte packets
4 [AS3356] 4.31.157.126 84.585 ms
5 [AS1742] 128.103.0.166 84.186 ms
6 [AS1742] 140.247.3.191 84.291 ms
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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