165.123.0.0/16

AS55 · University of Pennsylvania

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Summary

Country	United States
Domain	upenn.edu
ASN	AS55
Registry	ARIN
ID	UPENN

WHOIS Details

NetHandle:      NET-165-123-0-0-1
OrgID:          UNIVER-8-Z
Parent:         NET-165-0-0-0-0
NetName:        UPENN
NetRange:       165.123.0.0 - 165.123.255.255
NetType:        allocation
RegDate:        1993-05-28
Updated:        2021-12-14
Source:         ARIN


OrgID:          UNIVER-8-Z
OrgName:        University of Pennsylvania
CanAllocate:    
Street:         3401 Walnut Street
Street:         Suite 221A
City:           Philadelphia
State/Prov:     PA
Country:        US
PostalCode:     19104-6228
RegDate:        2010-01-05
Updated:        2022-08-03
OrgAdminHandle: UNIVE-ARIN
OrgTechHandle:  OBRIE72-ARIN
OrgAbuseHandle: ISO-ARIN
OrgNOCHandle:   UNIVE-ARIN
Source:         ARIN


POCHandle:      UNIVE-ARIN
IsRole:         Y
LastName:       University of Pennsylvania
FirstName:      
Street:         3401 Walnut Street
Street:         Suite 265C
City:           Philadelphia
State/Prov:     PA
Country:        US
PostalCode:     19104-6228
RegDate:        2002-12-10
Updated:        2025-08-27
OfficePhone:    +1-215-573-9631
Mailbox:        noc@isc.upenn.edu
Source:         ARIN


POCHandle:      OBRIE72-ARIN
IsRole:         N
LastName:       O'Brien
FirstName:      John
Street:         3401 Walnut St
City:           Philadelphia
State/Prov:     PA
Country:        US
PostalCode:     19104
RegDate:        2014-06-17
Updated:        2025-03-28
OfficePhone:    +1-215-898-9818
Mailbox:        obrienjw@upenn.edu
Source:         ARIN


POCHandle:      ISO-ARIN
IsRole:         Y
LastName:       Information Security Officer
FirstName:      
Street:         3401 Walnut Street
Street:         Rm C226
City:           Philadelphia
State/Prov:     PA
Country:        US
PostalCode:     19104-6228
RegDate:        2002-12-11
Updated:        2025-06-02
OfficePhone:    +1-215-898-2172
FaxPhone:       +1-215-573-2037
Mailbox:        security@upenn.edu
Source:         ARIN

Nearby Ranges

BGP prefixes that overlap with 165.0.0.0/8

Range	ASN	Company	Num of IPs
165.56.0.0/13	AS37154	Zambia Telecommunications Company Ltd aka ZAMTEL	524,288
165.50.0.0/15	AS37492	Orange Tunisie	131,072
165.174.0.0/16	AS36092	Centene Corporation	65,536
165.119.0.0/16	AS7046	Executive Office Of The President	65,536
165.95.0.0/16	AS1970	Texas A&M University	65,536
165.213.0.0/16	AS6619	SamsungSDS Inc.	65,536
165.88.0.0/16	AS6254	Revvity, Inc.	65,536
165.93.0.0/16	AS2907	National University Corporation Tokyo University of Agriculture and Technology	65,536
165.87.0.0/16	AS7018	AT&T Enterprises, LLC	65,536
165.110.0.0/16	AS4185	U.S. Small Business Administration	65,536
165.196.0.0/16	AS2152	Los Rios Community College District	65,536
165.244.0.0/16	AS4668	LG CNS	65,536
165.108.0.0/16	AS4713	ITOCHU Corporation	65,536
165.28.0.0/16	AS13567	Kimberly Clark	65,536
165.182.0.0/16	AS52226	CODELCO Chuquicamata	65,536
165.219.0.0/16	AS3136	CCAP	65,536
165.148.0.0/16	AS5734	Telkom SA Limited	65,536
165.132.0.0/16	AS4665	Yonsei University	65,536
165.221.0.0/16	AS4152	USDA	65,536
165.122.0.0/16	AS3376	WilTel	65,536
165.221.0.0/16	AS4155	USDA	65,536
165.19.0.0/16	AS22527	Safeway, Inc.	65,536
165.252.0.0/16	AS7018	AT&T Enterprises, LLC	65,536
165.186.0.0/16	AS4668	LG CNS	65,536
165.243.0.0/16	AS4668	LG CNS	65,536
165.166.0.0/16	AS22524	Spirit Communications	65,536
165.74.0.0/16	AS2152	State of California, Department of Education	65,536
165.29.0.0/16	AS21852	Arkansas Public School Computer Network	65,536
165.97.0.0/16	AS14890	Haynes and Boone, L.L.P.	65,536
165.206.0.0/16	AS6122	Iowa Communications Network	65,536
165.74.0.0/16	AS7018	State of California, Department of Education	65,536
165.119.0.0/16	AS2650	Executive Office Of The President	65,536
165.120.0.0/16	AS2856	BT Public Internet Service	65,536
165.68.0.0/16	AS29885	The University of Chicago	65,536
165.189.0.0/16	AS3136	State of WI Dept. of Administration	65,536
165.50.0.0/16	AS37492	African Network Information Center	65,536
165.3.0.0/16	AS327839	Woolworths Holdings Limited	65,536
165.118.0.0/16	AS136518	Metropolitan Health Service	65,536
165.122.0.0/16	AS3371	WilTel	65,536
165.79.0.0/16	AS14443	Broadridge Financial Solutions, Inc.	65,536
165.4.0.0/16	AS3741	Woolworths Holdings Limited	65,536
165.122.0.0/16	AS3372	WilTel	65,536
165.122.0.0/16	AS3375	WilTel	65,536
165.127.0.0/16	AS36081	State of Colorado General Government Computer	65,536
165.237.0.0/16	AS3456	Charter Communications Inc	65,536
165.201.0.0/16	AS3446	State of Kansas	65,536
165.254.0.0/16	AS2914	NTT America, Inc.	65,536
165.122.0.0/16	AS3378	WilTel	65,536
165.112.0.0/16	AS30387	National Institutes of Health	65,536

Hosted domains

There are 11 domain names hosted across 7 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
165.123.132.62	michaelbruni.net	3
165.123.141.156	kellerwilliamslexingtonky.com	2
165.123.34.75	archimedespalimpsest.net	2
165.123.60.122	whartonwrds.com	1
165.123.244.105	darrylpowellmemorialfund.com	1
165.123.57.141	tracyandwarren.org	1
165.123.30.95	lakadamyali.group	1

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.

Useful for Cybersecurity

Read more

Pingable IPs

3,653 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
165.123.192.26	AS400653 University of Pennsylvania	`1.56ms` from San Jose, US
165.123.210.113	AS55 University of Pennsylvania	`3.58ms` from New York City, US
165.123.229.220	AS55 University of Pennsylvania	`2.79ms` from New York City, US
165.123.243.7	AS55 University of Pennsylvania	`3.67ms` from New York City, US
165.123.227.104	AS55 University of Pennsylvania	`2.80ms` from New York City, US
165.123.231.2	AS55 University of Pennsylvania	`2.79ms` from New York City, US
165.123.189.232	AS55 University of Pennsylvania	`3.73ms` from New York City, US
165.123.241.164	AS55 University of Pennsylvania	`3.45ms` from New York City, US
165.123.242.88	AS55 University of Pennsylvania	`3.58ms` from New York City, US
165.123.188.80	AS55 University of Pennsylvania	`3.47ms` from New York City, US
165.123.209.191	AS55 University of Pennsylvania	`3.37ms` from New York City, US
165.123.225.201	AS55 University of Pennsylvania	`2.79ms` from New York City, US
165.123.244.165	AS55 University of Pennsylvania	`3.41ms` from New York City, US
165.123.208.17	AS55 University of Pennsylvania	`3.59ms` from New York City, US
165.123.252.79	AS55 University of Pennsylvania	`3.60ms` from New York City, US
165.123.224.162	AS55 University of Pennsylvania	`2.79ms` from New York City, US
165.123.226.223	AS55 University of Pennsylvania	`2.79ms` from New York City, US
165.123.216.57	AS55 University of Pennsylvania	`3.75ms` from New York City, US
165.123.239.3	AS55 University of Pennsylvania	`2.79ms` from New York City, US
165.123.240.129	AS55 University of Pennsylvania	`3.63ms` from New York City, US
165.123.228.123	AS55 University of Pennsylvania	`2.79ms` from New York City, US
165.123.217.12	AS55 University of Pennsylvania	`4.20ms` from New York City, US
165.123.230.235	AS55 University of Pennsylvania	`2.79ms` from New York City, US
165.123.157.193	AS55 University of Pennsylvania	`3.61ms` from New York City, US
165.123.66.163	AS55 University of Pennsylvania	`3.50ms` from New York City, 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
125.236.207.96	AS4771 Spark New Zealand Trading Ltd.	`0.99ms` from Auckland, NZ
94.111.229.160	AS47377 Orange Belgium SA	`12.64ms` from Brussels, BE
181.84.1.208	AS7303 Telecom Argentina S.A.	`1.72ms` from Buenos Aires, AR
201.66.61.176	AS8167 V tal	`0.77ms` from Curitiba, BR
38.97.40.144	AS174 Cogent Communications, LLC	`0.89ms` from New York City, US
218.226.145.240	AS9997 Suzuka Cable Co.,Ltd	`5.38ms` from Osaka, JP
187.90.249.208	AS26599 TELEFÔNICA BRASIL S.A	`5.05ms` from Osasco, BR
177.52.142.128	AS270837 Imartech Fibra	`10.70ms` from Osasco, BR
67.171.240.16	AS7922 Comcast Cable Communications, LLC	`2.24ms` from Portland, US
45.166.226.32	AS273533 FibraRede Gestao e Serviços de Infraestrutura Ltda	`1.04ms` from Sao Paulo, BR
32.216.19.32	AS46690 Southern New England Telephone Company and SNET America, Inc.	`5.57ms` from Secaucus, US
103.234.128.144	AS4811 China Telecom (Group)	`2.90ms` from Shanghai, CN
52.68.116.208	AS16509 Amazon.com, Inc.	`0.12ms` from Tokyo, JP
182.124.163.80	AS4837 CHINA UNICOM China169 Backbone	`7.80ms` from Zhengzhou, CN
140.232.222.160	AS53260 Clark University	`10.78ms` from Ashburn, US
101.5.215.48	AS4538 China Education and Research Network Center	`5.00ms` from Beijing, CN
91.45.61.192	AS3320 Deutsche Telekom AG	`6.16ms` from Berlin, DE
52.252.5.0	AS8075 Microsoft Corporation	`0.36ms` from Boydton, US
179.36.197.192	AS22927 Telefonica de Argentina	`2.41ms` from Buenos Aires, AR
154.176.140.144	AS8452 TE-AS	`3.92ms` from Cairo, EG
14.233.158.224	AS45899 VNPT Corp	`5.82ms` from Da Nang, VN
197.224.234.64	AS23889 Mauritius Telecom Ltd	`2.29ms` from Ebene, MU
102.32.32.208	AS327782 Metrofibre Networx	`2.75ms` from Johannesburg, ZA
15.185.35.224	AS16509 Amazon.com, Inc.	`0.34ms` from Manama, BH
85.93.52.64	AS12389 PJSC Rostelecom	`15.53ms` from Moscow, RU

Traceroute

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

traceroute -a -n -q1 -f2 -m10 165.123.58.229

traceroute to 165.123.58.229 (165.123.58.229): 10 hops max, 52 byte packets

2 [AS20278] 64.44.81.177 12.546 ms

3 *

4 *

5 *

6 *

7 [AS174] 154.54.7.130 27.861 ms

8 *

9 *

10 *

Measurement taken from

IPinfo ProbeNet in Denver, US

On October 30th 2025

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