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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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 9 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
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

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

IP Address ASN Details
140.247.210.62 AS1742 Harvard University 1.29ms from Boston, US
128.103.203.241 AS1742 Harvard University 1.41ms from Boston, US
128.103.136.1 AS1742 Harvard University 1.14ms from Boston, US
128.103.216.1 AS1742 Harvard University 1.14ms from Boston, US
128.103.204.1 AS1742 Harvard University 1.30ms from Boston, US
140.247.135.35 AS1742 Harvard University 1.50ms from Boston, US
140.247.151.28 AS1742 Harvard University 1.74ms from Boston, US
140.247.185.97 AS1742 Harvard University 1.20ms from Boston, US
140.247.200.238 AS1742 Harvard University 1.25ms from Boston, US
140.247.98.51 AS1742 Harvard University 1.27ms from Boston, US
140.247.96.206 AS1742 Harvard University 1.25ms from Boston, US
140.247.184.228 AS1742 Harvard University 1.35ms from Boston, US
2607:fb60:21:360::154 AS1742 Harvard University 5.86ms from New York City, US
140.247.179.141 AS1742 Harvard University 3.42ms from Boston, US
140.247.28.58 AS1742 Harvard University 1.28ms from Boston, US
128.103.251.248 AS1742 Harvard University 1.42ms from Boston, US
131.142.104.53 AS1742 Harvard University 3.13ms from Boston, US
140.247.168.101 AS1742 Harvard University 1.62ms from Boston, US
128.103.215.1 AS1742 Harvard University 1.26ms from Boston, US
140.247.198.161 AS1742 Harvard University 1.35ms from Boston, US
140.247.109.31 AS1742 Harvard University 1.23ms from Boston, US
128.103.146.1 AS1742 Harvard University 1.26ms from Boston, US
2607:fb60:2400:1::1 AS1742 Harvard University 5.98ms from New York City, US
140.247.119.60 AS1742 Harvard University 1.26ms from Boston, US
140.247.171.225 AS1742 Harvard University 1.30ms 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
154.249.164.30 AS36947 Telecom Algeria 14.50ms from Algiers, DZ
156.218.231.62 AS8452 TE-AS 7.79ms from Cairo, EG
75.173.10.254 AS19901 Brightspeed 4.61ms from Dallas, US
50.115.251.46 AS46792 Paragould Municipal Utilities 12.20ms from Dallas, US
185.164.229.254 AS203836 Net at vision Gesellschaft fuer Informationstechnologie mbH 0.36ms from Frankfurt am Main, DE
129.204.45.14 AS45090 Shenzhen Tencent Computer Systems Company Limited 1.97ms from Guangzhou, CN
176.38.83.110 AS39608 Lanet Network Ltd 0.76ms from Kyiv, UA
81.84.203.254 AS2860 NOS COMUNICACOES, S.A. 1.34ms from Lisbon, PT
176.149.104.238 AS5410 Bouygues Telecom SA 5.56ms from Marseille, FR
50.250.66.46 AS7922 Comcast Cable Communications, LLC 5.54ms from Miami, US
72.146.15.94 AS8075 Microsoft Corporation 0.15ms from Milan, IT
24.73.17.78 AS33363 Charter Communications, Inc 8.23ms from Orlando, US
20.236.159.222 AS8075 Microsoft Corporation 0.21ms from San Antonio, US
111.80.30.206 AS17421 Mobile Business Group 6.37ms from Taipei, TW
52.233.25.222 AS8075 Microsoft Corporation 0.18ms from Toronto, CA
99.234.241.238 AS812 Rogers Communications Canada Inc. 4.72ms from Toronto, CA
203.49.61.14 AS1221 Telstra Limited 0.91ms from Adelaide, AU
32.141.235.94 AS7018 AT&T Enterprises, LLC 0.73ms from Atlanta, US
110.247.158.142 AS4837 CHINA UNICOM China169 Backbone 10.90ms from Beijing, CN
20.7.111.254 AS8075 Microsoft Corporation 0.32ms from Boydton, US
222.160.171.254 AS4837 CHINA UNICOM China169 Backbone 5.87ms from Changchun, CN
70.120.126.46 AS11427 Charter Communications Inc 5.10ms from Dallas, US
73.203.121.190 AS7922 Comcast Cable Communications, LLC 2.33ms from Denver, US
103.90.0.254 AS132365 Bangladesh Agricultural University (BAU) 3.78ms from Dhaka, BD
87.41.66.78 AS1213 ASIERA TECHNOLOGY SERVICES CLG 7.03ms from Dublin, IE

Traceroute

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

$
traceroute -a -n -q1 -m5 128.103.111.152
traceroute to 128.103.111.152 (128.103.111.152): 5 hops max, 52 byte packets
1 [AS208450] 45.136.59.1 11.56 ms
3 *
4 *
5 *
Measurement taken from IPinfo ProbeNet in Aktau, 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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