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 8 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
AS40127 Longwood Medical and Academic Area (LMA)
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ASN API & Database

Upstreams

There are 4 upstreams for this ASN.

upstreams Name
AS10578 Harvard University
AS11164 Internet2
AS174 Cogent Communications, LLC
AS3356 Level 3 Parent, LLC
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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

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

IP Address ASN Details
140.247.212.135 AS1742 Harvard University 1.28ms from Boston, US
128.103.6.244 AS1742 Harvard University 0.98ms from Boston, US
140.247.81.93 AS1742 Harvard University 1.68ms from Boston, US
128.103.228.1 AS1742 Harvard University 1.22ms from Boston, US
128.103.215.1 AS1742 Harvard University 1.27ms from Boston, US
128.103.226.129 AS1742 Harvard University 1.33ms from Boston, US
128.103.134.1 AS1742 Harvard University 1.44ms from Boston, US
128.103.205.1 AS1742 Harvard University 1.26ms from Boston, US
140.247.115.99 AS1742 Harvard University 1.65ms from Boston, US
140.247.185.97 AS1742 Harvard University 1.18ms from Boston, US
128.103.96.1 AS1742 Harvard University 1.37ms from Boston, US
128.103.204.1 AS1742 Harvard University 1.29ms from Boston, US
140.247.199.129 AS1742 Harvard University 1.15ms from Boston, US
128.103.105.1 AS1742 Harvard University 1.29ms from Boston, US
140.247.235.193 AS1742 Harvard University 1.19ms from Boston, US
2607:fb60:2:23::2 AS1742 Harvard University 2.49ms from Springfield, US
2607:fb60:23:432::1 AS1742 Harvard University 2.47ms from Springfield, US
2607:fb60:1011:2006:7dd2:b567:214b:6a0a AS1742 Harvard University 5.90ms from Springfield, US
128.103.109.139 AS1742 Harvard University 1.24ms from Boston, US
140.247.182.82 AS1742 Harvard University 1.30ms from Boston, US
128.103.90.111 AS1742 Harvard University 1.21ms from Boston, US
140.247.148.30 AS1742 Harvard University 1.21ms from Boston, US
140.247.234.193 AS1742 Harvard University 1.32ms from Boston, US
140.247.122.166 AS1742 Harvard University 1.21ms from Boston, US
140.247.198.161 AS1742 Harvard University 1.39ms 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
105.104.188.190 AS36947 Telecom Algeria 9.35ms from Algiers, DZ
185.119.31.62 AS197731 The Internet Engineering Group B.V. 0.58ms from Amsterdam, NL
61.181.37.78 AS4837 CHINA UNICOM China169 Backbone 6.29ms from Beijing, CN
50.56.120.206 AS19994 Rackspace Hosting 0.67ms from Chicago, US
222.180.169.46 AS134420 Chongqing Telecom 0.51ms from Chongqing, CN
97.114.197.254 AS19901 Brightspeed 6.79ms from Dallas, US
5.231.143.238 AS12360 KEVAG Telekom GmbH 7.16ms from Frankfurt am Main, DE
91.190.207.254 AS15451 DATEV eG 2.97ms from Frankfurt am Main, DE
141.3.29.254 AS34878 Karlsruhe Institute of Technology 2.90ms from Frankfurt am Main, DE
58.22.5.142 AS4837 CHINA UNICOM China169 Backbone 7.55ms from Fuzhou, CN
4.225.106.142 AS8075 Microsoft Corporation 0.18ms from Gaevle, SE
118.185.23.206 AS55410 Vodafone Idea Ltd 1.03ms from Kolkata, IN
71.34.238.254 AS19901 Brightspeed 2.81ms from Minneapolis, US
112.83.93.254 AS4837 CHINA UNICOM China169 Backbone 6.33ms from Nanjing, CN
50.174.29.254 AS7922 Comcast Cable Communications, LLC 2.30ms from New York City, US
209.180.144.254 AS209 CenturyLink Communications, LLC 1.20ms from Phoenix, US
61.81.168.142 AS4766 Korea Telecom 4.37ms from Seoul, KR
180.159.127.126 AS4812 China Telecom (Group) 4.63ms from Shanghai, CN
60.53.20.254 AS4788 TM TECHNOLOGY SERVICES SDN. BHD. 6.50ms from Singapore, SG
118.163.147.254 AS3462 Data Communication Business Group 1.32ms from Taipei, TW
210.243.121.158 AS9924 Taiwan Fixed Network, Telco and Network Service Provider. 0.91ms from Taipei, TW
31.193.193.190 AS43811 Telia Lietuva, AB 0.94ms from Vilnius, LT
95.85.22.30 AS14061 DigitalOcean, LLC 0.19ms from Amsterdam, NL
107.220.45.190 AS7018 AT&T Enterprises, LLC 6.76ms from Chicago, US
65.103.165.254 AS209 CenturyLink Communications, LLC 13.07ms from Denver, US

Traceroute

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

$
traceroute -a -n -q1 -m6 140.247.157.55
traceroute to 140.247.157.55 (140.247.157.55): 6 hops max, 52 byte packets
2 *
4 *
5 *
6 *
Measurement taken from IPinfo ProbeNet in Cayenne, GF
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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