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

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

IP Address ASN Details
128.103.27.14 AS1742 Harvard University 1.23ms from Boston, US
140.247.197.141 AS1742 Harvard University 1.40ms from Boston, US
128.103.134.81 AS1742 Harvard University 1.43ms from Boston, US
140.247.129.11 AS1742 Harvard University 1.68ms from Boston, US
140.247.93.124 AS1742 Harvard University 1.33ms from Boston, US
140.247.101.42 AS1742 Harvard University 1.26ms from Boston, US
140.247.235.193 AS1742 Harvard University 1.15ms from Boston, US
2607:fb60:2501:2177::100 AS1742 Harvard University 5.67ms from New York City, US
2607:fb60:37:1::1 AS1742 Harvard University 5.63ms from New York City, US
128.103.132.1 AS1742 Harvard University 1.31ms from Boston, US
128.103.200.113 AS1742 Harvard University 1.27ms from Boston, US
140.247.183.7 AS1742 Harvard University 1.46ms from Boston, US
128.103.249.65 AS1742 Harvard University 1.23ms from Boston, US
128.103.93.1 AS1742 Harvard University 1.19ms from Boston, US
140.247.3.134 AS1742 Harvard University 1.13ms from Boston, US
2607:fb60:2:23::2 AS1742 Harvard University 5.84ms from New York City, US
2607:fb60:1014:2106:c0e:56ab:7515:6d83 AS1742 Harvard University 9.21ms from New York City, US
140.247.110.151 AS1742 Harvard University 1.27ms from Boston, US
128.103.247.193 AS1742 Harvard University 1.25ms from Boston, US
140.247.69.167 AS1742 Harvard University 1.22ms from Boston, US
140.247.123.110 AS1742 Harvard University 1.24ms from Boston, US
128.103.16.1 AS1742 Harvard University 1.48ms from Boston, US
128.103.1.242 AS1742 Harvard University 0.84ms from Boston, US
140.247.137.234 AS1742 Harvard University 1.29ms from Boston, US
140.247.25.65 AS1742 Harvard University 1.26ms 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
77.62.167.126 AS1136 KPN B.V. 15.57ms from Amsterdam, NL
73.234.115.110 AS7922 Comcast Cable Communications, LLC 4.55ms from Boston, US
186.128.199.14 AS22927 Telefonica de Argentina 1.94ms from Buenos Aires, AR
18.116.154.254 AS16509 Amazon.com, Inc. 0.15ms from Columbus, US
192.30.156.254 AS27216 Air Advantage LLC 7.51ms from Grand Rapids, US
119.237.42.254 AS4760 HKT Limited 0.75ms from Hong Kong, HK
222.100.24.46 AS4766 Korea Telecom 0.75ms from Incheon, KR
125.140.252.190 AS4766 Korea Telecom 3.25ms from Incheon, KR
202.3.29.78 AS9530 SHINSEGAE I C Co., Ltd. 1.46ms from Incheon, KR
104.34.50.254 AS20001 Charter Communications Inc 5.51ms from Los Angeles, US
189.251.32.190 AS8151 UNINET 2.48ms from Mexico City, MX
112.83.93.254 AS4837 CHINA UNICOM China169 Backbone 6.37ms from Nanjing, CN
24.73.17.78 AS33363 Charter Communications, Inc 8.23ms from Orlando, US
14.66.177.30 AS4766 Korea Telecom 2.62ms from Seoul, KR
14.44.105.254 AS4766 Korea Telecom 6.93ms from Seoul, KR
101.34.135.142 AS45090 Shenzhen Tencent Computer Systems Company Limited 1.61ms from Shanghai, CN
60.53.20.254 AS4788 TM TECHNOLOGY SERVICES SDN. BHD. 6.39ms from Singapore, SG
1.168.95.158 AS3462 Data Communication Business Group 1.72ms from Taichung, TW
219.91.68.254 AS131627 Peicity Digital Cable Television., LTD 1.33ms from Taipei, TW
89.155.239.254 AS2860 NOS COMUNICACOES, S.A. 5.34ms from Braga, PT
164.41.44.78 AS21506 Fundação Universidade de Brasília 0.60ms from Brasilia, BR
23.10.235.254 AS16625 Akamai Technologies, Inc. 0.12ms from Delhi, IN
58.22.5.142 AS4837 CHINA UNICOM China169 Backbone 7.57ms from Fuzhou, CN
219.222.243.238 AS4538 China Education and Research Network Center 2.10ms from Guangzhou, CN

Traceroute

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

$
traceroute -a -n -q1 -f10 -m19 131.142.252.68
traceroute to 131.142.252.68 (131.142.252.68): 19 hops max, 52 byte packets
10 [AS174] 130.117.49.189 28.147 ms
11 [AS174] 154.54.61.133 33.616 ms
12 [AS174] 154.54.61.118 40.764 ms
13 [AS174] 154.54.75.138 48.217 ms
14 [AS174] 154.54.94.45 116.389 ms
15 [AS174] 38.104.186.114 120.239 ms
16 [AS1742] 128.103.0.129 120.237 ms
17 *
18 *
19 *
Measurement taken from IPinfo ProbeNet in Algiers, DZ
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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