23.90.121.0/24

AS16417 · Cisco Systems Ironport Division

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Summary

Country	United States
Domain	cisco.com
ASN	AS16417
Registry	ARIN
ID	CISL-7

WHOIS Details

NetHandle:      NET-23-90-96-0-1
OrgID:          CISL-7
Parent:         NET-23-0-0-0-0
NetName:        CISL-7
NetRange:       23.90.96.0 - 23.90.127.255
NetType:        allocation
RegDate:        2019-10-28
Updated:        2022-11-14
Source:         ARIN


OrgID:          CISL-7
OrgName:        Cisco Systems Ironport Division
CanAllocate:    
Street:         170 West Tasman Drive
City:           San Jose
State/Prov:     CA
Country:        US
PostalCode:     95134
RegDate:        2010-11-09
Updated:        2023-02-03
OrgAdminHandle: ISO3-ARIN
OrgTechHandle:  BOUDJ-ARIN
OrgTechHandle:  ISO3-ARIN
OrgAbuseHandle: INA15-ARIN
OrgNOCHandle:   ISO3-ARIN
Source:         ARIN


POCHandle:      ISO3-ARIN
IsRole:         Y
LastName:       Ironport Network Operations
FirstName:      
Street:         170 W Tasman Dr
City:           San Jose
State/Prov:     CA
Country:        US
PostalCode:     95134
RegDate:        2005-06-07
Updated:        2025-02-24
OfficePhone:    +1-408-424-1164
OfficePhone:    +1-650-898-1526
Mailbox:        [email protected]
Mailbox:        [email protected]
Source:         ARIN


POCHandle:      BOUDJ-ARIN
IsRole:         N
LastName:       BOUDJEDAIMI
FirstName:      SOFIANE
Street:         170 West Tasman Dr.
City:           San Jose
State/Prov:     CA
Country:        US
PostalCode:     95134
RegDate:        2018-08-15
Updated:        2025-02-04
OfficePhone:    +1-408-527-7461
Mailbox:        [email protected]
Source:         ARIN


POCHandle:      INA15-ARIN
IsRole:         Y
LastName:       Ironport Network Abuse
FirstName:      
Street:         170 West Tasman Dr
City:           San Jose
State/Prov:     CA
Country:        US
PostalCode:     95134
RegDate:        2005-06-07
Updated:        2025-06-04
OfficePhone:    +1-408-424-1164
OfficePhone:    +1-650-898-1526
Mailbox:        [email protected]
Mailbox:        [email protected]
Source:         ARIN

Nearby Ranges

BGP prefixes that overlap with 23.90.0.0/16

Range	ASN	Company	Num of IPs
23.90.192.0/18	AS16347	UNYC SAS	16,384
23.90.64.0/22	AS47638	Cadence Networks Ltd	1,024
23.90.28.0/22	AS62904	ServerHub Dallas	1,024
23.90.88.0/22	AS397332	City of Anacortes	1,024
23.90.84.0/24	AS62685	CloudCo Partner Inc.	256
23.90.33.0/24	AS62904	Direct Inbox Delivery	256
23.90.46.0/24	AS62904	ServerHub Dallas	256
23.90.73.0/24	AS17321	LHC Group	256
23.90.68.0/24	AS27381	Index Exchange Inc.	256
23.90.78.0/24	AS62685	WatchGuard Technologies, Inc.	256

Hosted domains

There are no domains currently hosted on this ASN.

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

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

IP Address	ASN	Details
23.90.121.200	AS16417 Cisco Systems Ironport Division	`0.85ms` from San Jose, 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
75.109.41.88	AS19108 Optimum	`13.87ms` from Ashburn, US
97.140.118.8	AS6167 Verizon Business	`15.80ms` from Atlanta, US
121.79.252.216	AS17705 InSPire Net Ltd	`8.99ms` from Auckland, NZ
134.224.227.88	AS16509 Amazon.com, Inc.	`0.71ms` from Boardman, US
98.213.34.168	AS7922 Comcast Cable Communications, LLC	`5.10ms` from Chicago, US
35.12.102.104	AS231 Michigan State University	`2.73ms` from Detroit, US
24.243.104.152	AS11427 Charter Communications Inc	`13.93ms` from Houston, US
49.88.173.168	AS4134 CHINANET-BACKBONE	`8.05ms` from Huai'an, CN
58.148.67.200	AS17858 LG POWERCOMM	`4.09ms` from Incheon, KR
23.76.111.88	AS9534 Binariang Berhad	`0.62ms` from Kuala Lumpur, MY
18.133.152.120	AS16509 Amazon.com, Inc.	`0.11ms` from London, GB
35.197.242.104	AS396982 Google LLC	`0.11ms` from London, GB
76.122.239.216	AS7922 Comcast Cable Communications, LLC	`7.39ms` from Murfreesboro, US
60.241.226.216	AS7545 TPG Telecom Limited	`1.19ms` from Sydney, AU
196.77.17.248	AS36903 Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM	`4.82ms` from Casablanca, MA
86.165.82.200	AS2856 British Telecommunications PLC	`5.47ms` from London, GB
139.138.71.40	AS30404 Blue Stream	`1.17ms` from Miami, US
95.139.196.8	AS12389 PJSC Rostelecom	`4.30ms` from Moscow, RU
98.41.82.72	AS7922 Comcast Cable Communications, LLC	`8.28ms` from San Jose, US
122.239.163.24	AS4134 CHINANET-BACKBONE	`12.66ms` from Shanghai, CN
210.160.211.72	AS4713 NTT DOCOMO BUSINESS,Inc.	`2.78ms` from Tokyo, JP
197.79.24.168	AS37611 AFRIHOST SP (PTY) LTD	`15.54ms` from Cape Town, ZA
52.211.124.136	AS16509 Amazon.com, Inc.	`0.28ms` from Dublin, IE
14.117.220.152	AS136199 CHINANET Guangdong province Yuedong MAN network	`3.83ms` from Guangzhou, CN
129.159.133.72	AS31898 Oracle Corporation	`0.16ms` from Jerusalem, IL

Traceroute

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

traceroute -a -n -q1 -f3 23.90.121.3

traceroute to 23.90.121.3 (23.90.121.3): 64 hops max, 52 byte packets

3 [] 206.223.117.132 1.03 ms

4 [] 142.215.90.250 0.943 ms

5 [AS15830] 137.174.173.182 1.954 ms

6 [AS16417] 68.232.128.5 1.832 ms

7 [AS16417] 23.90.121.3 1.375 ms

Measurement taken from

IPinfo ProbeNet in San Jose, US

On January 30th 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.

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