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 84,185,967,300,503,931,839,013,978,112
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
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 ██████████ 104
128.103.64.74 ████████ 93
199.94.63.6 ██████████ 11
131.142.21.11 ██████████ 8
131.142.21.13 ██████████ 5
65.112.0.71 ██████████ 4
140.247.63.234 ██████████ 3
128.103.109.12 ██████████ 3
140.247.173.13 ██████████ 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
AS3549 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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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

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

IP Address ASN Details
140.247.166.121 AS1742 Harvard University 1.66ms from Boston, US
128.103.182.37 AS1742 Harvard University 1.56ms from Boston, US
140.247.208.232 AS1742 Harvard University 2.37ms from Boston, US
128.103.37.153 AS1742 Harvard University 1.20ms from Boston, US
140.247.171.225 AS1742 Harvard University 1.28ms from Boston, US
128.103.229.193 AS1742 Harvard University 1.23ms from Boston, US
140.247.72.248 AS1742 Harvard University 1.58ms from Boston, US
128.103.249.193 AS1742 Harvard University 1.41ms from Boston, US
128.103.6.244 AS1742 Harvard University 1.00ms from Boston, US
140.247.101.150 AS1742 Harvard University 1.44ms from Boston, US
140.247.64.65 AS1742 Harvard University 1.44ms from Boston, US
140.247.119.197 AS1742 Harvard University 1.26ms from Boston, US
128.103.93.213 AS1742 Harvard University 1.25ms from Boston, US
140.247.116.80 AS1742 Harvard University 1.43ms from Boston, US
128.103.175.5 AS1742 Harvard University 1.36ms from Boston, US
128.103.209.1 AS1742 Harvard University 1.29ms from Boston, US
128.103.96.156 AS1742 Harvard University 1.57ms from Boston, US
128.103.239.1 AS1742 Harvard University 1.29ms from Boston, US
140.247.235.193 AS1742 Harvard University 1.14ms from Boston, US
128.103.196.16 AS1742 Harvard University 1.22ms from Boston, US
140.247.26.72 AS1742 Harvard University 1.79ms from Providence, US
140.247.189.123 AS1742 Harvard University 1.74ms from Providence, US
140.247.185.97 AS1742 Harvard University 1.67ms from Providence, US
128.103.179.1 AS1742 Harvard University 1.57ms from Boston, US
128.103.172.196 AS1742 Harvard University 1.47ms 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
222.153.10.222 AS4771 Spark New Zealand Trading Ltd. 10.55ms from Auckland, NZ
74.223.129.206 AS7029 Windstream Communications LLC 7.66ms from Chicago, US
71.213.39.254 AS19901 Brightspeed 12.98ms from Cleveland, US
217.35.164.126 AS2856 British Telecommunications PLC 2.23ms from Erith, GB
114.71.101.206 AS55616 DGIST 4.48ms from Incheon, KR
175.141.227.254 AS4788 TM TECHNOLOGY SERVICES SDN. BHD. 1.11ms from Kuala Lumpur, MY
193.22.106.126 AS204675 DIGIBIT TECH LTD 0.40ms from London, GB
83.231.210.238 AS2914 NTT America, Inc. 1.18ms from London, GB
103.19.51.254 AS62864 net innovation llc 0.36ms from Osaka, JP
177.247.184.14 AS13999 Mega Cable, S.A. de C.V. 15.49ms from Santiago de Querétaro, MX
221.155.112.254 AS4766 Korea Telecom 1.96ms from Seoul, KR
218.152.67.30 AS4766 Korea Telecom 1.49ms from Seoul, KR
169.213.129.46 AS4766 Korea Telecom 6.00ms from Seoul, KR
85.187.246.174 AS41280 SKYNET BULGARIA Ltd. 0.57ms from Sofia, BG
60.250.213.254 AS3462 Data Communication Business Group 1.92ms from Taipei, TW
61.70.132.254 AS9416 Hoshin Multimedia Center Inc. 4.19ms from Taipei, TW
113.235.216.78 AS4837 CHINA UNICOM China169 Backbone 8.23ms from Tieling, CN
92.111.13.46 AS33915 Vodafone Libertel B.V. 6.77ms from Amsterdam, NL
96.77.88.206 AS7922 Comcast Cable Communications, LLC 4.67ms from Atlanta, US
99.145.252.126 AS7018 AT&T Enterprises, LLC 6.29ms from Chicago, US
172.183.107.110 AS8075 Microsoft Corporation 0.49ms from Chicago, US
196.249.73.254 AS327885 Viettel Tanzania PLC 0.53ms from Dar es Salaam, TZ
86.186.44.206 AS2856 British Telecommunications PLC 3.63ms from Erith, GB
95.89.169.254 AS3209 Vodafone GmbH 2.28ms from Frankfurt am Main, DE
31.18.149.254 AS3209 Vodafone GmbH 1.96ms from Hamburg, DE

Traceroute

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

$
traceroute -a -n -q1 -f4 -m15 128.103.193.107
traceroute to 128.103.193.107 (128.103.193.107): 15 hops max, 52 byte packets
5 [AS213230] 5.161.0.85 0.504 ms
6 *
7 [AS174] 154.54.25.225 1.007 ms
8 [AS174] 154.54.25.17 1.54 ms
9 [AS174] 154.54.30.122 6.631 ms
10 [AS174] 154.54.46.33 12.357 ms
11 [AS174] 38.104.186.114 12.128 ms
12 [AS1742] 128.103.0.166 13.082 ms
13 *
14 *
15 *
Measurement taken from IPinfo ProbeNet in Ashburn, US
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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