AS number 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 322
Number of IPv4 204,032
Number of IPv6 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 322 domain names hosted across 63 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
128.103.124.40 ██████████ 3
140.247.63.234 ████████ 3
140.247.173.125 █████████ 3
128.103.109.12 ██████████ 3
131.142.21.12 ██████████ 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

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

IP Address ASN Details
140.247.233.194 AS1742 Harvard University 1.08ms from Boston, US
140.247.35.241 AS1742 Harvard University 1.76ms from Boston, US
140.247.136.209 AS1742 Harvard University 1.39ms from Boston, US
128.103.160.228 AS1742 Harvard University 1.10ms from Boston, US
140.247.195.193 AS1742 Harvard University 1.39ms from Boston, US
140.247.109.108 AS1742 Harvard University 1.38ms from Boston, US
128.103.92.1 AS1742 Harvard University 1.33ms from Boston, US
128.103.196.1 AS1742 Harvard University 1.33ms from Boston, US
128.103.176.1 AS1742 Harvard University 1.38ms from Boston, US
140.247.110.151 AS1742 Harvard University 1.36ms from Boston, US
2607:fb60:0:2311::1 AS1742 Harvard University 5.67ms from New York City, US
2607:fb60:fe10:200::2 AS1742 Harvard University 5.79ms from New York City, US
128.103.173.254 AS1742 Harvard University 1.42ms from Boston, US
128.103.94.1 AS1742 Harvard University 1.21ms from Boston, US
128.103.249.193 AS1742 Harvard University 1.25ms from Boston, US
140.247.98.51 AS1742 Harvard University 1.33ms from Boston, US
67.134.206.9 AS1742 Harvard University 1.18ms from Boston, US
140.247.29.42 AS1742 Harvard University 1.45ms from Boston, US
140.247.93.42 AS1742 Harvard University 1.37ms from Boston, US
128.103.36.1 AS1742 Harvard University 1.54ms from Boston, US
140.247.218.202 AS1742 Harvard University 1.49ms from Boston, US
128.103.209.1 AS1742 Harvard University 1.22ms from Boston, US
140.247.106.46 AS1742 Harvard University 1.33ms from Boston, US
2607:fb60:1:411::2 AS1742 Harvard University 6.02ms from New York City, US
140.247.39.51 AS1742 Harvard University 1.81ms from Providence, 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
37.74.215.46 AS1136 KPN B.V. 12.76ms from Amsterdam, NL
92.111.13.46 AS33915 Vodafone Libertel B.V. 7.63ms from Amsterdam, NL
216.12.143.46 AS29748 Quality Technology Services, LLC 0.48ms from Ashburn, US
99.25.113.30 AS7018 AT&T Enterprises, LLC 9.54ms from Atlanta, US
12.248.125.222 AS7018 AT&T Enterprises, LLC 7.86ms from Atlanta, US
221.194.168.14 AS4837 CHINA UNICOM China169 Backbone 3.62ms from Beijing, CN
189.34.37.222 AS28573 Claro NXT Telecomunicacoes Ltda 13.35ms from Curitiba, BR
103.90.0.254 AS132365 Bangladesh Agricultural University (BAU) 3.26ms from Dhaka, BD
87.151.187.142 AS3320 Deutsche Telekom AG 4.43ms from Duesseldorf, DE
219.76.158.254 AS4760 HKT Limited 1.53ms from Hong Kong, HK
65.181.197.254 AS11492 CABLE ONE, INC. 14.81ms from Kansas City, US
154.20.194.94 AS852 TELUS Communications Inc. 1.15ms from Kelowna, CA
193.168.191.110 AS197628 Sudak-Net LLC 11.91ms from Krasnodar, RU
176.36.87.158 AS39608 Lanet Network Ltd 0.55ms from Kyiv, UA
45.140.163.254 AS205341 SEDE SISTEMAS Y COMUNICACIONES S.L. 8.71ms from Madrid, ES
88.20.140.174 AS3352 TELEFONICA DE ESPANA S.A.U. 9.74ms from Madrid, ES
50.250.66.46 AS7922 Comcast Cable Communications, LLC 5.11ms from Miami, US
79.5.249.254 AS3269 Telecom Italia S.p.A. 4.23ms from Milan, IT
3.96.189.254 AS16509 Amazon.com, Inc. 0.13ms from Montreal, CA
112.83.93.254 AS4837 CHINA UNICOM China169 Backbone 6.18ms from Nanjing, CN
91.190.207.254 AS15451 DATEV eG 0.67ms from Nuernberg, DE
88.138.245.46 AS15557 Societe Francaise Du Radiotelephone - SFR SA 14.35ms from Paris, FR
182.34.235.46 AS4134 CHINANET-BACKBONE 8.06ms from Qingdao, CN
172.11.233.46 AS7018 AT&T Enterprises, LLC 12.27ms from Santa Clara, US
14.7.242.14 AS17858 LG POWERCOMM 2.50ms from Seoul, KR

Traceroute

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

$
traceroute -a -n -q1 -f5 -m10 128.103.86.163
traceroute to 128.103.86.163 (128.103.86.163): 10 hops max, 52 byte packets
5 [AS4755] 121.241.91.97 32.493 ms
6 *
7 [AS6453] 180.87.38.5 10.089 ms
8 *
9 *
10 *
Measurement taken from IPinfo ProbeNet in Ahmedabad, IN
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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