128.9.32.0/20

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 27 domain names hosted across 8 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP

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
128.9.46.112	AS4 University of Southern California	`1.38ms` from Los Angeles, US
128.9.44.22	AS4 University of Southern California	`1.36ms` from Los Angeles, US
128.9.40.1	AS4 University of Southern California	`1.52ms` from Los Angeles, US
128.9.36.12	AS4 University of Southern California	`1.56ms` from Los Angeles, US
128.9.35.44	AS4 University of Southern California	`1.59ms` from Los Angeles, US
128.9.37.100	AS4 University of Southern California	`1.57ms` from Los Angeles, US
128.9.47.133	AS4 University of Southern California	`1.36ms` 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
4.255.121.164	AS8075 Microsoft Corporation	`0.41ms` from Ashburn, US
110.244.145.20	AS4837 CHINA UNICOM China169 Backbone	`6.38ms` from Beijing, CN
115.130.47.132	AS7545 TPG Telecom Limited	`1.67ms` from Brisbane, AU
174.131.237.212	AS7029 Windstream Communications LLC	`14.45ms` from Chicago, US
202.49.128.20	AS24324 Kordia Limited	`4.98ms` from Christchurch, NZ
34.249.69.212	AS16509 Amazon.com, Inc.	`0.22ms` from Dublin, IE
20.223.11.20	AS8075 Microsoft Corporation	`0.16ms` from Dublin, IE
90.205.106.228	AS5607 Sky UK Limited	`5.48ms` from Erith, GB
176.96.118.4	AS8649 ZeXoTeK IT-Services GmbH	`0.65ms` from Frankfurt am Main, DE
66.91.162.180	AS20001 Charter Communications Inc	`7.48ms` from Honolulu, US
99.69.137.244	AS7018 AT&T Enterprises, LLC	`2.34ms` from Houston, US
114.203.137.180	AS9318 SK Broadband Co Ltd	`5.53ms` from Incheon, KR
98.240.101.20	AS7922 Comcast Cable Communications, LLC	`8.72ms` from Murfreesboro, US
37.23.28.196	AS12389 PJSC Rostelecom	`5.56ms` from Novosibirsk, RU
112.246.45.116	AS4837 CHINA UNICOM China169 Backbone	`9.34ms` from Qingdao, CN
112.17.231.244	AS56041 China Mobile communications corporation	`6.34ms` from Shanghai, CN
23.2.135.84	AS16625 Akamai Technologies, Inc.	`5.66ms` from Sioux Falls, US
35.129.214.196	AS20115 Charter Communications LLC	`5.42ms` from St. Louis, US
80.217.129.68	AS1257 Tele2 Sverige AB	`4.44ms` from Stockholm, SE
109.226.15.164	AS50463 Triple C Cloud Computing Ltd.	`1.86ms` from Tel Aviv, IL
35.77.89.68	AS16509 Amazon.com, Inc.	`0.26ms` from Tokyo, JP
173.35.154.132	AS812 Rogers Communications Canada Inc.	`2.06ms` from Toronto, CA
45.234.6.4	AS267351 JOSUEL FRANCISCO DE OLIVEIRA - ME	`16.09ms` from Uberlandia, BR
212.159.201.212	AS29063 Eviden Netherlands B.V.	`3.17ms` from Amsterdam, NL
50.206.158.20	AS7922 Comcast Cable Communications, LLC	`1.61ms` from Atlanta, US

Traceroute

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

traceroute -a -n -q1 -m7 128.9.45.2

traceroute to 128.9.45.2 (128.9.45.2): 7 hops max, 52 byte packets

1 [AS15169] 142.251.65.159 139.254 ms

2 *

3 [AS226] 130.152.181.123 147.313 ms

4 [AS4] 198.32.16.29 147.405 ms

5 *

6 *

7 *

Measurement taken from

IPinfo ProbeNet in Brussels, BE

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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