128.9.28.0/23

AS4 · University of Southern California

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Summary

Country	United States
Domain	usc.edu
ASN	AS4
Registry	ARIN
ID	ISI-NET

WHOIS Details

NetHandle:      NET-128-9-0-0-1
OrgID:          USC-32-Z
Parent:         NET-128-0-0-0-0
NetName:        ISI-NET
NetRange:       128.9.0.0 - 128.9.255.255
NetType:        allocation
RegDate:        1984-08-01
Updated:        2023-09-29
TechHandle:     ACT-ORG-ARIN
Source:         ARIN


OrgID:          USC-32-Z
OrgName:        University of Southern California
CanAllocate:    
Street:         Information Sciences Institute
Street:         4676 Admiralty Way, Suite 1001
City:           Marina del Rey
State/Prov:     CA
Country:        US
PostalCode:     90292
RegDate:        2023-09-08
Updated:        2023-09-21
OrgAdminHandle: ACT-ORG-ARIN
OrgTechHandle:  ACT-ORG-ARIN
OrgAbuseHandle: ACT-ORG-ARIN
Source:         ARIN


POCHandle:      ACT-ORG-ARIN
IsRole:         Y
LastName:       IPC Computing Services
FirstName:      
Street:         4676 Admiralty Way, Suite 1001
City:           Marina del Rey
State/Prov:     CA
Country:        US
PostalCode:     90292
RegDate:        1970-01-01
Updated:        2025-06-02
OfficePhone:    +1-310-448-8289
Mailbox:        action@isi.edu
Source:         ARIN

Nearby Ranges

BGP prefixes that overlap with 128.9.0.0/16

No nearby ranges found.

Hosted domains

There are 5 domain names hosted across 4 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
128.9.29.23	shelterfinder.org	2
128.9.29.34	thisrental.com	1
128.9.28.9	liang-zhu.net	1
128.9.29.33	thisrent.com	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

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

IP Address	ASN	Details
128.9.29.19	AS4 University of Southern California	`0.89ms` from Los Angeles, US
128.9.28.77	AS4 University of Southern California	`0.91ms` from Los Angeles, 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
93.89.65.231	AS196733 Eskisehir Bilisim Iletisim San. ve Tic. A.S.	`7.72ms` from Ankara, TR
172.234.133.39	AS63949 Akamai Connected Cloud	`0.27ms` from Ashburn, US
45.17.46.55	AS7018 AT&T Enterprises, LLC	`3.58ms` from Miami, US
73.131.229.55	AS7922 Comcast Cable Communications, LLC	`3.56ms` from Salt Lake City, US
189.161.216.247	AS8151 UNINET	`8.35ms` from Santiago de Queretaro, MX
189.146.150.183	AS8151 UNINET	`4.08ms` from Santiago de Queretaro, MX
189.78.58.183	AS27699 TELEFÔNICA BRASIL S.A	`8.80ms` from Sao Paulo, BR
121.104.6.247	AS2516 KDDI CORPORATION	`19.84ms` from Tokyo, JP
197.203.176.247	AS36947 Telecom Algeria	`11.95ms` from Algiers, DZ
20.73.47.183	AS8075 Microsoft Corporation	`0.29ms` from Amsterdam, NL
200.44.210.119	AS8048 CANTV Servicios, Venezuela	`14.11ms` from Caracas, VE
61.128.163.151	AS4134 CHINANET-BACKBONE	`4.49ms` from Chongqing, CN
20.67.138.103	AS8075 Microsoft Corporation	`0.15ms` from Dublin, IE
88.72.222.231	AS3209 Vodafone GmbH	`4.49ms` from Hamburg, DE
88.2.252.71	AS3352 TELEFONICA DE ESPANA S.A.U.	`1.18ms` from Madrid, ES
220.153.63.7	AS18081 Kintetsu Cable Network Co., Ltd.	`1.22ms` from Osaka, JP
146.48.122.167	AS137 Consortium GARR	`5.09ms` from Rome, IT
64.173.4.87	AS7018 AT&T Enterprises, LLC	`2.62ms` from San Jose, US
203.232.201.7	AS18028 GyeongSang National University	`7.57ms` from Seoul, KR
167.103.60.23	AS53813 ZSCALER, INC.	`0.62ms` from Singapore, SG
73.207.109.39	AS7922 Comcast Cable Communications, LLC	`4.42ms` from Atlanta, US
80.78.162.103	AS21032 TELTA Citynetz GmbH	`1.33ms` from Berlin, DE
98.216.147.87	AS7922 Comcast Cable Communications, LLC	`8.97ms` from Boston, US
73.60.123.247	AS7922 Comcast Cable Communications, LLC	`6.26ms` from Boston, US
73.74.55.151	AS7922 Comcast Cable Communications, LLC	`10.26ms` from Chicago, US

Traceroute

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

traceroute -a -n -q1 128.9.28.247

traceroute to 128.9.28.247 (128.9.28.247): 64 hops max, 52 byte packets

1 [AS15169] 142.251.65.159 226.222 ms

2 *

3 *

4 [AS226] 130.152.184.54 229.494 ms

5 [AS4] 128.9.28.247 228.821 ms

Measurement taken from

IPinfo ProbeNet in Delhi, IN

On February 16th 2026

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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