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 15 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
204.205.100.37 AS7421 Cogent Communications, LLC 28.28ms from Ashburn, US
204.204.176.98 AS7421 Cogent Communications, LLC 28.30ms from Ashburn, US
204.205.251.187 AS7421 Cogent Communications, LLC 28.29ms from Ashburn, US
204.204.115.155 AS7421 Cogent Communications, LLC 28.29ms from Ashburn, US
209.120.99.219 AS7421 Cogent Communications, LLC 28.36ms from Ashburn, US
209.120.12.178 AS7421 Cogent Communications, LLC 28.36ms from Ashburn, US
209.120.47.130 AS7421 Cogent Communications, LLC 28.33ms from Ashburn, US
204.204.231.245 AS7421 Cogent Communications, LLC 28.29ms from Ashburn, US
204.204.136.22 AS7421 Cogent Communications, LLC 28.35ms from Ashburn, US
204.204.103.148 AS7421 Cogent Communications, LLC 28.28ms from Ashburn, US
204.205.30.192 AS7421 Cogent Communications, LLC 28.27ms from Ashburn, US
204.205.110.143 AS7421 Cogent Communications, LLC 28.31ms from Ashburn, US
204.204.236.67 AS7421 Cogent Communications, LLC 28.27ms from Ashburn, US
209.120.28.150 AS7421 Cogent Communications, LLC 28.35ms from Ashburn, US
209.120.2.127 AS7421 Cogent Communications, LLC 28.34ms from Ashburn, US
204.205.84.251 AS7421 Cogent Communications, LLC 28.27ms from Ashburn, US
204.204.28.233 AS7421 Cogent Communications, LLC 28.29ms from Ashburn, US
204.204.34.26 AS7421 Cogent Communications, LLC 28.30ms from Ashburn, US
204.204.246.169 AS7421 Cogent Communications, LLC 28.28ms from Ashburn, US
204.205.27.176 AS7421 Cogent Communications, LLC 28.27ms from Ashburn, US
204.204.85.12 AS7421 Cogent Communications, LLC 28.29ms from Ashburn, US
204.205.11.157 AS7421 Cogent Communications, LLC 28.29ms from Ashburn, US
209.120.57.220 AS7421 Cogent Communications, LLC 28.34ms from Ashburn, US
204.205.207.226 AS7421 Cogent Communications, LLC 28.29ms from Ashburn, US
204.204.17.133 AS7421 Cogent Communications, LLC 28.33ms 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
20.61.255.125 AS8075 Microsoft Corporation 0.26ms from Amsterdam, NL
18.214.89.45 AS14618 Amazon.com, Inc. 0.53ms from Ashburn, US
159.27.158.157 AS58593 Shanghai Blue Cloud Technology Co.,Ltd 3.20ms from Beijing, CN
35.162.187.157 AS16509 Amazon.com, Inc. 0.15ms from Boardman, US
129.92.223.157 AS668 United States Department of Defense (DoD) 4.20ms from Chicago, US
116.31.190.109 AS140308 CHINATELECOM Guangdong province Zhuhai 5G network 6.30ms from Guangzhou, CN
183.245.80.93 AS56041 China Mobile communications corporation 8.80ms from Hangzhou, CN
23.36.242.205 AS20940 Akamai International B.V. 0.23ms from Jakarta, ID
189.124.223.45 AS28220 Alares Cabo Servicos de Telecomunicacoes S.A. 3.15ms from Joao Pessoa, BR
202.163.107.29 AS9541 Cyber Internet Services (Pvt) Ltd. 18.07ms from Karachi, PK
35.237.128.61 AS396982 Google LLC 0.14ms from Moncks Corner, US
106.5.97.13 AS4134 CHINANET-BACKBONE 6.96ms from Nanchang, CN
75.246.95.45 AS6167 Verizon Business 15.75ms from New York City, US
178.170.46.77 AS21409 Ikoula Net SAS 0.74ms from Reims, FR
187.65.188.61 AS28573 Claro NXT Telecomunicacoes Ltda 11.94ms from Rio de Janeiro, BR
93.71.208.29 AS30722 Vodafone Italia S.p.A. 3.18ms from Rome, IT
191.112.191.237 AS7418 TELEFÓNICA CHILE S.A. 4.91ms from Santiago, CL
179.125.92.205 AS262988 Pombonet Telecomunicações e Informática 1.87ms from Sao Paulo, BR
177.107.69.173 AS52862 ISP PREMIUM TELECOM S/A 2.95ms from Sao Paulo, BR
180.227.46.93 AS17858 LG POWERCOMM 1.91ms from Seoul, KR
59.10.63.189 AS4766 Korea Telecom 1.60ms from Seoul, KR
108.241.15.77 AS7018 AT&T Enterprises, LLC 3.89ms from Atlanta, US
192.144.135.205 AS45090 Shenzhen Tencent Computer Systems Company Limited 1.76ms from Beijing, CN
210.12.21.253 AS4808 China Unicom Beijing Province Network 4.81ms from Beijing, CN
116.131.137.77 AS4837 CHINA UNICOM China169 Backbone 9.56ms from Beijing, CN

Traceroute

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

$
traceroute -a -n -q1 -f2 204.205.201.145
traceroute to 204.205.201.145 (204.205.201.145): 64 hops max, 52 byte packets
2 [AS917] 199.119.65.2 0.141 ms
3 *
4 *
5 *
6 *
7 *
8 *
9 *
10 [AS7421] 204.205.201.145 24.556 ms
Measurement taken from IPinfo ProbeNet in Ashburn, 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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