1. All IP Ranges
  2. 38.0.0.0/8
  3. 38.247.0.0/16
  4. AS3819  | 38.247.121.0/24

38.247.121.0/24

AS3819  ·  EdgePrizm

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Summary

Country United States
Domain cogentco.com
ASN AS3819
Parent Range 38.0.0.0/8
Registry ARIN
ID COGENT-A

WHOIS Details

NetHandle:      NET-38-0-0-0-1
OrgID:          COGC
Parent:         
NetName:        COGENT-A
NetRange:       38.0.0.0 - 38.255.255.255
NetType:        allocation
RegDate:        1991-04-16
Updated:        2025-09-23
Source:         ARIN


OrgID:          COGC
OrgName:        Cogent Communications, LLC
CanAllocate:    
Street:         2450 N Street NW
City:           Washington
State/Prov:     DC
Country:        US
PostalCode:     20037
Comment:        Geofeed https://geofeed.cogentco.com/geofeed.csv
RegDate:        2000-05-30
Updated:        2025-09-23
ReferralServer: rwhois://rwhois.cogentco.com:4321
OrgAdminHandle: IPALL-ARIN
OrgTechHandle:  IPALL-ARIN
OrgAbuseHandle: COGEN-ARIN
OrgNOCHandle:   ZC108-ARIN
Source:         ARIN


POCHandle:      ZC108-ARIN
IsRole:         Y
LastName:       Cogent Communications
FirstName:      
Street:         2450 N Street NW
City:           Washington
State/Prov:     DC
Country:        US
PostalCode:     20037
RegDate:        2001-01-24
Updated:        2025-07-08
OfficePhone:    +1-877-875-4311
Mailbox:        noc@cogentco.com
Source:         ARIN


POCHandle:      IPALL-ARIN
IsRole:         Y
LastName:       IP Allocation
FirstName:      
Street:         2450 N Street NW
City:           Washington
State/Prov:     DC
Country:        US
PostalCode:     20037
RegDate:        2002-11-13
Updated:        2025-07-08
OfficePhone:    +1-877-875-4311
Mailbox:        ipalloc@cogentco.com
Source:         ARIN


POCHandle:      COGEN-ARIN
IsRole:         Y
LastName:       Cogent Abuse
FirstName:      
Street:         2450 N street, NW
City:           Washington
State/Prov:     DC
Country:        US
PostalCode:     20037
RegDate:        2002-11-13
Updated:        2025-07-08
OfficePhone:    +1-877-875-4311
Mailbox:        abuse@cogentco.com
Source:         ARIN

Overlapping Ranges

BGP prefixes that contain 38.247.121.0/24

Range ASN Company Num of IPs
38.0.0.0/8 AS11029 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS133524 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS133585 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS136625 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS1378 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS14011 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS14598 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS15326 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS174 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS18463 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS19021 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS19797 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS209058 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS212337 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS213685 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS214103 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS264838 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS265531 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS265865 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS270075 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS270138 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS270147 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS270226 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS272273 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS272373 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS272393 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS272979 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS273039 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS273144 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS273244 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS274796 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS27884 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS28439 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS28458 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS30038 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS32393 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS32402 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS32863 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS35699 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS36242 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS3819 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS393351 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS395246 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS396408 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS397468 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS398843 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS398885 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS399002 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS399064 Cogent Communications, LLC 16,777,216
38.0.0.0/8 AS399188 Cogent Communications, LLC 16,777,216

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

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Pingable IPs

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

IP Address ASN Details
38.247.121.42 AS174 Cogent Communications, LLC 0.33ms from Paris, FR

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
176.187.67.200 AS5410 Bouygues Telecom SA 1.84ms from Aubervilliers, FR
139.9.116.56 AS55990 Huawei Cloud Service data center 3.41ms from Beijing, CN
98.100.241.136 AS10796 Charter Communications Inc 17.39ms from Columbus, US
117.210.139.184 AS9829 National Internet Backbone 7.79ms from Delhi, IN
194.44.230.232 AS3255 UARNet-Eksintech 3.61ms from Khmelnytskyi, UA
189.223.94.184 AS8151 UNINET 4.17ms from Los Angeles, US
59.100.129.232 AS2764 AAPT Limited 1.36ms from Melbourne, AU
119.181.124.136 AS4837 CHINA UNICOM China169 Backbone 6.46ms from Qingdao, CN
39.90.11.120 AS4837 CHINA UNICOM China169 Backbone 7.65ms from Qingdao, CN
161.148.201.40 AS10954 SERVICO FEDERAL DE PROCESSAMENTO DE DADOS - SERPRO 15.84ms from Rio de Janeiro, BR
124.56.186.184 AS17858 LG POWERCOMM 4.80ms from Seoul, KR
219.118.113.120 AS18094 Tokyo Cable Network.,INC 1.11ms from Tokyo, JP
136.187.101.136 AS2907 Research Organization of Information and Systems, National Institute of Informatics 1.32ms from Tokyo, JP
87.195.255.8 AS12414 Solcon Internetdiensten B.V. 3.06ms from Amsterdam, NL
177.86.192.120 AS262773 PROXXIMA TELECOMUNICACOES SA 2.75ms from Campina Grande, BR
175.3.246.216 AS4134 CHINANET-BACKBONE 7.92ms from Changsha, CN
75.162.174.24 AS209 CenturyLink Communications, LLC 8.54ms from Chicago, US
184.59.110.72 AS10796 Charter Communications Inc 12.92ms from Columbus, US
3.147.145.40 AS16509 Amazon.com, Inc. 0.15ms from Columbus, US
120.201.15.104 AS9808 China Mobile Communications Group Co., Ltd. 8.33ms from Dalian, CN
99.103.70.88 AS7018 AT&T Enterprises, LLC 6.51ms from Dallas, US
106.213.33.88 AS24560 Bharti Airtel Ltd., Telemedia Services 10.07ms from Delhi, IN
73.26.7.104 AS7922 Comcast Cable Communications, LLC 9.39ms from Denver, US
2.19.246.8 AS16625 Akamai Technologies, Inc. 0.42ms from Duesseldorf, DE
115.76.203.56 AS7552 Viettel Group 19.70ms from Ho Chi Minh City, VN

Traceroute

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

$
traceroute -a -n -q1 -f4 38.247.121.19
traceroute to 38.247.121.19 (38.247.121.19): 64 hops max, 52 byte packets
4 [AS174] 130.117.1.161 1.165 ms
5 [AS174] 149.6.161.55 0.524 ms
6 [AS174] 38.247.121.19 0.355 ms
Measurement taken from IPinfo ProbeNet in Paris, FR
On

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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