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
140.247.220.142 AS1742 Harvard University 6.18ms from Boston, US
128.103.196.16 AS1742 Harvard University 1.23ms from Boston, US
128.103.147.168 AS1742 Harvard University 0.97ms from Boston, US
140.247.206.249 AS1742 Harvard University 1.49ms from Boston, US
128.103.178.1 AS1742 Harvard University 1.08ms from Boston, US
2607:fb60:2502:2179::116 AS1742 Harvard University 5.80ms from New York City, US
2607:fb60:e:24::ac AS1742 Harvard University 5.71ms from New York City, US
140.247.16.98 AS1742 Harvard University 1.34ms from Boston, US
128.103.38.165 AS1742 Harvard University 0.90ms from Boston, US
140.247.96.206 AS1742 Harvard University 1.25ms from Boston, US
128.103.251.248 AS1742 Harvard University 1.42ms from Boston, US
128.103.204.1 AS1742 Harvard University 1.30ms from Boston, US
2607:fb60:a:3::d AS1742 Harvard University 5.47ms from New York City, US
2607:fb60:1011:2006:9ff:551c:8630:ecef AS1742 Harvard University 8.41ms from New York City, US
140.247.91.155 AS1742 Harvard University 1.24ms from Boston, US
140.247.196.83 AS1742 Harvard University 1.54ms from Boston, US
140.247.120.200 AS1742 Harvard University 1.30ms from Boston, US
128.103.183.1 AS1742 Harvard University 1.34ms from Boston, US
140.247.36.110 AS1742 Harvard University 1.39ms from Boston, US
140.247.111.40 AS1742 Harvard University 3.51ms from Boston, US
128.103.16.1 AS1742 Harvard University 1.48ms from Boston, US
2607:fb60:1b:812::4 AS1742 Harvard University 5.84ms from New York City, US
140.247.122.95 AS1742 Harvard University 1.21ms from Boston, US
140.247.113.25 AS1742 Harvard University 1.63ms from Boston, US
140.247.175.243 AS1742 Harvard University 1.62ms 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
185.51.212.174 AS50670 VTEL HOLDINGS LIMITED/JORDAN CO. 4.59ms from Amman, JO
101.205.70.126 AS4837 CHINA UNICOM China169 Backbone 10.44ms from Chengdu, CN
75.173.10.254 AS19901 Brightspeed 4.61ms from Dallas, US
184.96.48.254 AS209 CenturyLink Communications, LLC 1.30ms from Denver, US
3.77.53.254 AS16509 Amazon.com, Inc. 0.16ms from Frankfurt am Main, DE
84.144.189.30 AS3320 Deutsche Telekom AG 7.05ms from Frankfurt am Main, DE
27.44.91.30 AS17816 China Unicom IP network China169 Guangdong province 4.83ms from Guangzhou, CN
219.222.243.238 AS4538 China Education and Research Network Center 2.10ms from Guangzhou, CN
103.126.159.254 AS135958 Teko Vietnam Technology Joint Stock Company 0.70ms from Hanoi, VN
202.3.29.78 AS9530 SHINSEGAE I C Co., Ltd. 1.46ms from Incheon, KR
177.100.159.206 AS28573 Claro NXT Telecomunicacoes Ltda 14.27ms from Joao Pessoa, BR
115.135.173.254 AS4788 TM TECHNOLOGY SERVICES SDN. BHD. 1.54ms from Kuala Lumpur, MY
96.71.23.62 AS7922 Comcast Cable Communications, LLC 5.86ms from Miami, US
95.236.194.62 AS3269 Telecom Italia S.p.A. 5.22ms from Milan, IT
210.237.56.14 AS7511 SYNAPSE Co.,Ltd. 11.49ms from Osaka, JP
54.164.55.94 AS14618 Amazon.com, Inc. 0.27ms from Reston, US
211.189.128.94 AS38661 abcle 1.34ms from Seoul, KR
118.33.146.190 AS4766 Korea Telecom 1.85ms from Seoul, KR
14.43.49.126 AS4766 Korea Telecom 6.76ms from Seoul, KR
49.245.85.78 AS4773 MobileOne Ltd. Mobile/Internet Service Provider Singapore 2.64ms from Singapore, SG
125.230.103.94 AS3462 Data Communication Business Group 1.97ms from Taichung, TW
66.204.102.30 AS21852 State Of Arkansas, Division of Information Systems 10.45ms from Tulsa, US
31.165.17.254 AS6730 Sunrise GmbH 1.97ms from Zuerich, CH
71.60.145.126 AS7922 Comcast Cable Communications, LLC 10.36ms from Ashburn, US
32.141.235.94 AS7018 AT&T Enterprises, LLC 0.73ms from Atlanta, US

Traceroute

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

$
traceroute -a -n -q1 -m5 128.103.66.43
traceroute to 128.103.66.43 (128.103.66.43): 5 hops max, 52 byte packets
3 *
4 *
5 *
Measurement taken from IPinfo ProbeNet in Abu Dhabi, AE
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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