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
128.103.211.254 AS1742 Harvard University 1.27ms from Boston, US
128.103.229.193 AS1742 Harvard University 1.24ms from Boston, US
140.247.26.72 AS1742 Harvard University 1.79ms from Boston, US
128.103.246.1 AS1742 Harvard University 1.28ms from Boston, US
128.103.105.1 AS1742 Harvard University 1.29ms from Boston, US
128.103.109.139 AS1742 Harvard University 1.24ms from Boston, US
140.247.235.193 AS1742 Harvard University 1.19ms from Boston, US
140.247.137.183 AS1742 Harvard University 1.37ms from Boston, US
140.247.28.58 AS1742 Harvard University 1.27ms from Boston, US
140.247.116.80 AS1742 Harvard University 1.44ms from Boston, US
128.103.209.1 AS1742 Harvard University 1.28ms from Boston, US
140.247.129.11 AS1742 Harvard University 1.64ms from Boston, US
140.247.141.129 AS1742 Harvard University 1.16ms from Boston, US
2607:fb60:2502:2179::116 AS1742 Harvard University 2.49ms from Springfield, US
128.103.253.129 AS1742 Harvard University 1.36ms from Boston, US
128.103.197.1 AS1742 Harvard University 1.11ms from Boston, US
128.103.248.225 AS1742 Harvard University 1.00ms from Boston, US
140.247.3.134 AS1742 Harvard University 1.14ms from Boston, US
140.247.107.185 AS1742 Harvard University 1.24ms from Boston, US
128.103.28.1 AS1742 Harvard University 1.33ms from Boston, US
140.247.64.65 AS1742 Harvard University 1.49ms from Boston, US
140.247.117.47 AS1742 Harvard University 1.25ms from Boston, US
128.103.137.1 AS1742 Harvard University 1.11ms from Boston, US
128.103.205.1 AS1742 Harvard University 1.26ms from Boston, US
128.103.234.199 AS1742 Harvard University 1.51ms 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
120.53.9.110 AS45090 Shenzhen Tencent Computer Systems Company Limited 1.87ms from Beijing, CN
41.251.141.254 AS36903 Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM 2.07ms from Casablanca, MA
63.131.163.190 AS14140 Auburn Essential Services 5.97ms from Columbus, US
90.247.175.110 AS5378 Vodafone Limited 4.95ms from Edinburgh, GB
77.22.94.254 AS3209 Vodafone GmbH 4.95ms from Hamburg, DE
103.14.81.254 AS131907 Iwami Cablevision Co.,Ltd. 1.88ms from Hiroshima, JP
120.72.106.94 AS24085 Quang Trung Software City Development Company 1.03ms from Ho Chi Minh City, VN
116.108.143.190 AS7552 Viettel Group 0.93ms from Ho Chi Minh City, VN
59.148.143.62 AS9269 Hong Kong Broadband Network Ltd. 1.47ms from Hong Kong, HK
218.190.221.238 AS9304 HGC Global Communications Limited 1.76ms from Hong Kong, HK
14.44.105.254 AS4766 Korea Telecom 7.25ms from Incheon, KR
182.23.43.94 AS4800 PT Aplikanusa Lintasarta 0.85ms from Jakarta, ID
82.48.94.238 AS3269 Telecom Italia S.p.A. 1.92ms from Milan, IT
177.52.64.254 AS262438 VELOMAX TELECOM S/A 11.92ms from Osasco, BR
175.237.26.254 AS4766 Korea Telecom 1.64ms from Seoul, KR
14.39.214.30 AS4766 Korea Telecom 0.82ms from Seoul, KR
66.172.90.254 AS21713 Bulloch County Rural Telephone Cooperative, Inc. 7.22ms from Atlanta, US
87.142.69.174 AS3320 Deutsche Telekom AG 4.26ms from Berlin, DE
197.45.160.110 AS8452 TE-AS 7.12ms from Cairo, EG
67.6.175.254 AS19901 Brightspeed 11.63ms from Chicago, US
34.41.232.30 AS396982 Google LLC 0.15ms from Council Bluffs, US
65.103.165.254 AS209 CenturyLink Communications, LLC 13.07ms from Denver, US
34.254.79.30 AS16509 Amazon.com, Inc. 0.22ms from Dublin, IE
196.14.233.254 AS3741 Dimension Data 1.51ms from Johannesburg, ZA
39.50.209.14 AS17557 Pakistan Telecommunication Company Limited 3.90ms from Karachi, PK

Traceroute

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

$
traceroute -a -n -q1 -f3 -m7 140.247.214.90
traceroute to 140.247.214.90 (140.247.214.90): 7 hops max, 52 byte packets
3 [AS213753] 185.28.38.8 0.898 ms
4 [AS3257] 212.221.9.181 0.422 ms
5 *
6 *
7 *
Measurement taken from IPinfo ProbeNet in Amsterdam, NL
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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