173.37.0.0/20

AS109 · CISCO SYSTEMS, INC.

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Summary

Country	United States
Domain	cisco.com
ASN	AS109
Parent Range	173.36.0.0/14
Registry	ARIN
ID	CISCO-GEN-8

WHOIS Details

NetHandle:      NET-173-36-0-0-1
OrgID:          CS-2831
Parent:         NET-173-0-0-0-0
NetName:        CISCO-GEN-8
NetRange:       173.36.0.0 - 173.39.255.255
NetType:        allocation
Comment:        Geofeed https://www.cisco.com/web/automation/CiscoAS109_geoip.csv
RegDate:        2008-08-15
Updated:        2024-03-08
Source:         ARIN


OrgID:          CS-2831
OrgName:        CISCO SYSTEMS, INC.
CanAllocate:    
Street:         251 LITTLE FALLS DRIVE
City:           WILMINGTON
State/Prov:     DE
Country:        US
PostalCode:     19808
RegDate:        2023-06-07
Updated:        2024-02-16
OrgAdminHandle: GATC-ARIN
OrgTechHandle:  GATC-ARIN
OrgAbuseHandle: CISCO6-ARIN
OrgNOCHandle:   GATC-ARIN
Source:         ARIN


POCHandle:      GATC-ARIN
IsRole:         Y
LastName:       GIS ARIN Technical Contact
FirstName:      
Street:         170 West Tasman Dr.
City:           San Jose
State/Prov:     CA
Country:        US
PostalCode:     95134
RegDate:        2012-05-20
Updated:        2025-03-25
OfficePhone:    +1-408-526-8888
Mailbox:        [email protected]
Mailbox:        [email protected]
Source:         ARIN


POCHandle:      CISCO6-ARIN
IsRole:         Y
LastName:       Cisco CSIRT
FirstName:      
Street:         7025 Kit Creek Road
City:           Research Triangle Park
State/Prov:     NC
Country:        US
PostalCode:     27709
RegDate:        2024-02-16
Updated:        2025-03-04
OfficePhone:    +1-408-527-3227
Mailbox:        [email protected]
Source:         ARIN

Overlapping Ranges

BGP prefixes that contain 173.37.0.0/20

Range	ASN	Company	Num of IPs
173.36.0.0/14	AS109	CISCO SYSTEMS, INC.	262,144

Nearby Ranges

BGP prefixes that overlap with 173.37.0.0/16

Range	ASN	Company	Num of IPs
173.36.0.0/14	AS109	CISCO SYSTEMS, INC.	262,144

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

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Useful for Cybersecurity

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Pingable IPs

No IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

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
65.130.212.228	AS209 CenturyLink Communications, LLC	`2.34ms` from Draper, US
18.153.180.244	AS16509 Amazon.com, Inc.	`0.14ms` from Frankfurt am Main, DE
73.32.231.164	AS7922 Comcast Cable Communications, LLC	`6.68ms` from Houston, US
102.64.167.132	AS36924 GVA Cote d'Ivoire SAS	`0.76ms` from Lomé, TG
76.169.36.4	AS20001 Charter Communications Inc	`7.04ms` from Los Angeles, US
191.199.247.68	AS26599 TELEFÔNICA BRASIL S.A	`7.44ms` from Osasco, BR
200.185.218.52	AS28169 BITCOM PROVEDOR DE SERVICOS DE INTERNET LTDA	`2.38ms` from Porto Alegre, BR
211.34.126.164	AS4766 Korea Telecom	`1.92ms` from Seoul, KR
168.245.18.4	AS11377 SendGrid, Inc.	`0.39ms` from Ashburn, US
175.22.111.212	AS4837 CHINA UNICOM China169 Backbone	`3.53ms` from Changchun, CN
69.73.4.164	AS12083 WideOpenWest Finance LLC	`0.56ms` from Chicago, US
192.55.208.20	AS26723 St. Jude Children's Research Hospital	`12.73ms` from Chicago, US
168.75.178.164	AS15081 Omni Fiber	`5.44ms` from Columbus, US
3.143.116.228	AS16509 Amazon.com, Inc.	`0.69ms` from Columbus, US
47.188.51.244	AS5650 Frontier Communications of America, Inc.	`2.36ms` from Dallas, US
123.25.106.116	AS45899 VNPT Corp	`2.87ms` from Hanoi, VN
93.112.242.148	AS25019 Saudi Telecom Company JSC	`2.77ms` from Jeddah, SA
172.236.21.196	AS63949 Akamai Connected Cloud	`0.56ms` from London, GB
125.5.248.52	AS7629 EPLDT	`0.73ms` from Manila, PH
212.124.27.52	AS24699 PJSC Rostelecom	`16.85ms` from Moscow, RU
39.70.172.244	AS4837 CHINA UNICOM China169 Backbone	`9.00ms` from Qingdao, CN
52.44.56.68	AS14618 Amazon.com, Inc.	`0.17ms` from Reston, US
116.89.91.164	AS55430 Starhub Ltd	`2.68ms` from Singapore, SG
34.128.36.52	AS396982 Google LLC	`0.13ms` from Sydney, AU
1.165.166.68	AS3462 Data Communication Business Group	`1.49ms` from Taichung, TW

Traceroute

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

traceroute -a -n -q1 -f4 -m8 173.37.8.212

traceroute to 173.37.8.212 (173.37.8.212): 8 hops max, 52 byte packets

4 [AS109] 128.107.2.9 34.219 ms

5 [AS109] 72.163.0.102 33.919 ms

6 *

7 *

8 *

Measurement taken from

IPinfo ProbeNet in Toronto, CA

On December 6th 2025

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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