Autonomous System details

AS7421

Cogent Communications, LLC  ·  cogentco.com

United States

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AS7421 – Cogent Communications, LLC

Field Value
Country United States
Website cogentco.com
Hosted domains 0
IPv4 addresses 163,840
IPv6 addresses 0
ASN type ISP
Registry arin
Allocated 29 years ago on Dec 06, 1996
Updated 6 days ago on Dec 23, 2025

IP Ranges

Netblock Company Num of IPs
204.204.0.0/15 Cogent Communications, LLC 131,072
209.120.0.0/17 Cogent Communications, LLC 32,768

There are no known IPv6 addresses belonging to this network

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WHOIS Details

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                                                ASHandle:       AS7421
                                                OrgID:          AS7421
                                                ASName:         AS7421
                                                ASNumber:       AS7421
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA
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Hosted Domains

There are no domains currently hosted on this ASN.

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Peers

There are 2 peers for this ASN.

Peers Name
AS199524 G-Core Labs S.A.
AS8529 Zain Omantel International FZ-LLC
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ASN API & Database

Upstreams

There are 2 upstreams for this ASN.

upstreams Name
AS199524 G-Core Labs S.A.
AS8529 Zain Omantel International FZ-LLC
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ASN API & Database

Downstreams

There are no downstreams for this ASN.

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ASN API & Database

Pingable IPs

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

IP Address ASN Details
204.205.18.218 AS7421 Cogent Communications, LLC 0.16ms from Ashburn, US
204.204.218.111 AS7421 Cogent Communications, LLC 28.27ms from Ashburn, US
209.120.28.112 AS7421 Cogent Communications, LLC 28.34ms from Ashburn, US
204.205.38.188 AS7421 Cogent Communications, LLC 0.22ms from Ashburn, US
204.205.172.212 AS7421 Cogent Communications, LLC 0.32ms from Ashburn, US
204.205.233.38 AS7421 Cogent Communications, LLC 0.17ms from Ashburn, US
204.204.57.162 AS7421 Cogent Communications, LLC 0.18ms from Ashburn, US
209.120.106.210 AS7421 Cogent Communications, LLC 28.35ms from Ashburn, US
204.204.187.197 AS7421 Cogent Communications, LLC 0.16ms from Ashburn, US
204.205.88.219 AS7421 Cogent Communications, LLC 0.19ms from Ashburn, US
209.120.72.82 AS7421 Cogent Communications, LLC 28.35ms from Ashburn, US
204.204.191.142 AS7421 Cogent Communications, LLC 0.19ms from Ashburn, US
204.205.201.62 AS7421 Cogent Communications, LLC 0.17ms from Ashburn, US
209.120.43.88 AS7421 Cogent Communications, LLC 0.26ms from Ashburn, US
204.205.107.143 AS7421 Cogent Communications, LLC 0.19ms from Ashburn, US
204.205.180.128 AS7421 Cogent Communications, LLC 28.26ms from Ashburn, US
209.120.81.244 AS7421 Cogent Communications, LLC 28.35ms from Ashburn, US
204.205.89.205 AS7421 Cogent Communications, LLC 0.27ms from Ashburn, US
204.205.148.71 AS7421 Cogent Communications, LLC 0.18ms from Ashburn, US
209.120.21.75 AS7421 Cogent Communications, LLC 0.27ms from Ashburn, US
204.205.56.132 AS7421 Cogent Communications, LLC 0.18ms from Ashburn, US
204.205.117.116 AS7421 Cogent Communications, LLC 0.19ms from Ashburn, US
204.205.243.78 AS7421 Cogent Communications, LLC 0.18ms from Ashburn, US
204.204.206.145 AS7421 Cogent Communications, LLC 0.28ms from Ashburn, US
204.205.34.42 AS7421 Cogent Communications, LLC 0.18ms from Ashburn, 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
79.167.167.93 AS3329 VODAFONE-PANAFON HELLENIC TELECOMMUNICATIONS COMPANY SA 1.61ms from Athens, GR
63.87.4.157 AS701 Verizon Business 1.41ms from Atlanta, US
210.12.21.253 AS4808 China Unicom Beijing Province Network 4.91ms from Beijing, CN
120.5.53.253 AS4837 CHINA UNICOM China169 Backbone 7.03ms from Beijing, CN
3.28.2.253 AS16509 Amazon.com, Inc. 0.10ms from Dubai, AE
79.194.169.109 AS3320 Deutsche Telekom AG 5.97ms from Duesseldorf, DE
219.136.133.173 AS4134 CHINANET-BACKBONE 2.04ms from Guangzhou, CN
184.87.109.141 AS16625 Akamai Technologies, Inc. 0.49ms from Hong Kong, HK
103.12.30.61 AS55670 PT. Universal Broadband 13.34ms from Jakarta, ID
18.228.98.237 AS16509 Amazon.com, Inc. 0.13ms from Osasco, BR
174.67.120.205 AS22773 Cox Communications Inc. 0.76ms from Phoenix, US
112.233.153.173 AS4837 CHINA UNICOM China169 Backbone 4.58ms from Qingdao, CN
31.191.181.13 AS1267 WIND TRE S.P.A. 3.00ms from Rome, IT
68.199.58.221 AS6128 Cablevision Systems Corp. 11.12ms from Secaucus, US
14.7.107.253 AS17858 LG POWERCOMM 3.56ms from Seoul, KR
43.227.118.253 AS45974 NHNCLOUD 5.68ms from Seoul, KR
118.60.14.189 AS4766 Korea Telecom 3.63ms from Seoul, KR
112.164.5.45 AS4766 Korea Telecom 5.45ms from Seoul, KR
210.198.218.125 AS2516 KDDI CORPORATION 9.46ms from Tokyo, JP
213.202.47.109 AS21466 Kabelfernsehen Bodeli AG 8.62ms from Zuerich, CH
80.252.176.13 AS12552 GlobalConnect AB 0.88ms from Amsterdam, NL
34.186.126.125 AS396982 Google LLC 0.12ms from Ashburn, US
77.13.155.141 AS6805 Telefonica Germany GmbH & Co.OHG 4.06ms from Berlin, DE
206.85.235.205 AS33728 Unitel Inc 6.80ms from Boston, US
98.28.254.221 AS10796 Charter Communications Inc 11.78ms from Columbus, US

Traceroute

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

$
traceroute -a -n -q1 -f4 204.204.78.64
traceroute to 204.204.78.64 (204.204.78.64): 64 hops max, 52 byte packets
4 [AS3257] 89.149.130.50 8.495 ms
5 *
6 *
7 *
8 *
9 [AS7421] 204.204.78.64 36.893 ms
Measurement taken from IPinfo ProbeNet in Allentown, US
On

Related Networks

What is an ASN?

Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.

The ASN details will often correspond to the IP address owner, but for smaller organizations it may be that organization's parent, or their ISP. Find out more about AS7421 at robtex.

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