Autonomous System details

AS204064

CEZNET s.r.o. · ceznet.cz

Czechia

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AS204064 – CEZNET s.r.o.

Field	Value
Country	Czechia
Website	ceznet.cz
Hosted domains	9
IPv4 addresses	4,096
IPv6 addresses	633,825,300,114,114,700,748,351,602,688
ASN type	ISP
Registry	ripe
Allocated	10 years ago on Sep 03, 2015
Updated	4 months ago on Sep 12, 2025

Netblock	Company	Num of IPs
185.115.180.0/22	CEZNET s.r.o.	1,024
185.116.48.0/22	CEZNET s.r.o.	1,024
185.151.172.0/22	TAN	1,024
185.201.12.0/22	CEZNET s.r.o.	1,024
185.116.51.0/24	ISP Alliance	256

Netblock	Company
2a07:7a00::/29	CEZNET s.r.o.

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WHOIS Details

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                                                ASHandle:       AS204064
                                                OrgID:          AS204064
                                                ASName:         AS204064
                                                ASNumber:       AS204064
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA

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Hosted Domains

There are 9 domain names hosted across 5 IP addresses on this ASN.

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IP Address	Domain	Domains on this IP
185.151.174.67	██████████	5
185.201.15.66	██████████	1
185.151.172.79	██████████	1
185.151.175.71	██████████	1
185.151.175.84	████████	1

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Peers

There are 2 peers for this ASN.

Peers	Name
AS47232	ISP Alliance a.s.
AS51424	Jiri Sperl

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Upstreams

There is 1 peer for this ASN.

upstreams	Name
AS47232	ISP Alliance a.s.

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Downstreams

There is 1 peer for this ASN.

Downstreams	Name
AS51424	Jiri Sperl

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Pingable IPs

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

IP Address	ASN	Details
2a07:7a00:3402:99::1	AS204064 CEZNET s.r.o.	`5.17ms` from Prague, CZ
185.201.15.109	AS204064 CEZNET s.r.o.	`3.53ms` from Prague, CZ
185.151.175.121	AS204064 CEZNET s.r.o.	`3.19ms` from Prague, CZ
185.116.49.221	AS204064 CEZNET s.r.o.	`4.43ms` from Prague, CZ
2a07:7a01:f7ea:2::16	AS204064 CEZNET s.r.o.	`3.37ms` from Prague, CZ
185.151.173.224	AS204064 CEZNET s.r.o.	`3.23ms` from Prague, CZ
2a07:7a01:4100:0:60a4:b7ff:fec2:4dbd	AS204064 CEZNET s.r.o.	`4.01ms` from Prague, CZ
185.115.181.1	AS204064 CEZNET s.r.o.	`3.61ms` from Prague, CZ
185.115.183.13	AS204064 CEZNET s.r.o.	`3.25ms` from Prague, CZ
2a07:7a00:4100:301:76e6:b8ff:fe5b:349f	AS204064 CEZNET s.r.o.	`6.61ms` from Prague, CZ
2a07:7a01:4101:0:60a4:b7ff:fec2:3a46	AS204064 CEZNET s.r.o.	`4.00ms` from Prague, CZ
185.116.51.198	AS204064 CEZNET s.r.o.	`0.14ms` from Prague, CZ
185.115.180.77	AS204064 CEZNET s.r.o.	`0.30ms` from Prague, CZ
185.151.172.23	AS204064 CEZNET s.r.o.	`3.26ms` from Prague, CZ
2a07:7a01:3202:0:e848:b8ff:fe62:7407	AS204064 CEZNET s.r.o.	`4.23ms` from Prague, CZ
2a07:7a01:3401:0:1027:f5ff:feff:c03e	AS204064 CEZNET s.r.o.	`4.36ms` from Prague, CZ
185.201.13.20	AS204064 CEZNET s.r.o.	`3.34ms` from Prague, CZ
2a07:7a01:3800:0:e848:b8ff:fe5f:865c	AS204064 CEZNET s.r.o.	`4.31ms` from Prague, CZ
185.151.174.42	AS204064 CEZNET s.r.o.	`3.23ms` from Prague, CZ
185.201.12.74	AS204064 CEZNET s.r.o.	`3.39ms` from Prague, CZ
185.201.14.31	AS204064 CEZNET s.r.o.	`3.35ms` from Prague, CZ

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
101.29.213.176	AS4837 CHINA UNICOM China169 Backbone	`8.30ms` from Beijing, CN
34.28.92.160	AS396982 Google LLC	`0.10ms` from Council Bluffs, US
84.247.119.64	AS401293 FSTcloud	`0.57ms` from Frankfurt am Main, DE
178.32.204.240	AS16276 OVH SAS	`0.06ms` from Gravelines, FR
76.167.199.192	AS20001 Charter Communications Inc	`6.58ms` from Los Angeles, US
68.111.190.240	AS22773 Cox Communications Inc.	`9.16ms` from Los Angeles, US
168.235.198.128	AS54994 Meteverse Limited.	`0.49ms` from Montreal, CA
95.139.191.144	AS12389 PJSC Rostelecom	`4.56ms` from Moscow, RU
74.64.100.176	AS12271 Charter Communications Inc	`3.92ms` from New York City, US
159.203.89.128	AS14061 DigitalOcean, LLC	`0.31ms` from New York City, US
91.217.180.16	AS197258 PJSC Sovkombank	`1.11ms` from Novosibirsk, RU
90.107.87.0	AS3215 Orange S.A.	`6.84ms` from Paris, FR
20.153.206.0	AS8069 Microsoft Corporation	`0.25ms` from San Antonio, US
1.157.69.32	AS1221 Telstra Limited	`5.84ms` from Sydney, AU
4.205.79.96	AS8075 Microsoft Corporation	`0.18ms` from Toronto, CA
139.213.202.160	AS4837 CHINA UNICOM China169 Backbone	`6.26ms` from Changchun, CN
79.198.147.240	AS3320 Deutsche Telekom AG	`8.25ms` from Frankfurt am Main, DE
183.108.61.32	AS4766 Korea Telecom	`2.79ms` from Incheon, KR
97.202.100.240	AS6167 Verizon Business	`16.68ms` from Los Angeles, US
97.134.87.16	AS6167 Verizon Business	`7.32ms` from Los Angeles, US
79.156.40.144	AS3352 TELEFONICA DE ESPANA S.A.U.	`10.55ms` from Madrid, ES
3.97.255.144	AS16509 Amazon.com, Inc.	`0.15ms` from Montreal, CA
76.71.205.112	AS577 Bell Canada	`3.73ms` from Montreal, CA
121.129.143.176	AS4766 Korea Telecom	`1.38ms` from Seoul, KR
1.158.47.128	AS1221 Telstra Limited	`2.57ms` from Sydney, AU

Traceroute

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

traceroute -a -n -q1 -m8 185.116.48.74

traceroute to 185.116.48.74 (185.116.48.74): 8 hops max, 52 byte packets

1 [AS51248] 193.161.86.1 6.433 ms

2 [AS51248] 185.8.57.10 0.199 ms

3 [] 91.210.16.109 4.599 ms

4 [AS47232] 217.75.210.15 7.058 ms

5 [AS204064] 185.115.180.41 6.778 ms

6 *

7 *

8 *

Measurement taken from

IPinfo ProbeNet in Veseli nad Moravou, CZ

On January 18th 2026

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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 AS204064 at robtex.

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