Autonomous System details

AS204666

Jiri Tlapak · tlapnet.cz

Czechia

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AS204666 – Jiri Tlapak

Field	Value
Country	Czechia
Website	tlapnet.cz
Hosted domains	661
IPv4 addresses	15,104
IPv6 addresses	4,516,006,472,238,886,852,629,200,000,000
ASN type	ISP
Registry	ripe
Allocated	8 years ago on Jan 29, 2018
Updated	a year ago on Mar 25, 2025

Netblock	Company	Num of IPs
37.221.240.0/20	ISP Alliance a.s.	4,096
45.153.192.0/22	ISP Alliance a.s.	1,024
85.255.88.0/22	ISP Alliance a.s.	1,024
185.19.0.0/22	ISP Alliance a.s.	1,024
185.64.220.0/22	ISP Alliance a.s.	1,024
185.87.140.0/22	Jiri Tlapak	1,024
185.97.24.0/22	ISP Alliance a.s.	1,024
185.230.172.0/22	Jiri Tlapak	1,024
185.243.172.0/22	Jiri Tlapak	1,024
5.59.102.0/23	IT Globe s.r.o.	512
91.224.90.0/23	Livady s.r.o.	512
185.87.142.0/23	Jiri Tlapak	512
213.108.162.0/23	ISP Alliance a.s.	512
37.221.241.0/24	Caslav - Tlapnet s.r.o.	256
37.221.242.0/24	Caslav - Tlapnet s.r.o.	256
37.221.243.0/24	Caslav - Tlapnet s.r.o.	256
37.221.245.0/24	Policka - Tlapnet s.r.o.	256
37.221.247.0/24	Policka and Rychnov nad Kneznou - Tlapnet s.r.o.	256
37.221.248.0/24	Prelouc - Tlapnet s.r.o.	256
37.221.249.0/24	Prelouc - Tlapnet s.r.o.	256
37.221.250.0/24	Svetla nad Sazavou - Tlapnet s.r.o.	256
37.221.251.0/24	Svetla nad Sazavou - Tlapnet s.r.o.	256
37.221.252.0/24	Golcuv Jenikov - Tlapnet s.r.o.	256
45.153.192.0/24	ISP Alliance a.s.	256
45.153.194.0/24	ISP Alliance a.s.	256
45.153.195.0/24	ISP Alliance a.s.	256
176.119.192.0/24	Jiri Tlapak	256
185.64.220.0/24	core routers and so on of GS-NET s.r.o.	256
185.64.222.0/24	client usage	256
185.74.60.0/24	Tlapnet s.r.o.	256
185.97.24.0/24	STEN.cz s.r.o.	256
185.97.25.0/24	STEN.cz s.r.o.	256
185.97.26.0/24	STEN.cz s.r.o.	256
185.188.100.0/24	TrojanoviceNET s.r.o.	256
185.188.101.0/24	Tlapnet s.r.o.	256
185.188.103.0/24	Tlapnet s.r.o.	256
213.108.162.0/24	ISP Alliance a.s.	256

Netblock	Company
2a04:c740::/29	ISP Alliance a.s.
2a04:f940::/29	ISP Alliance a.s.
2a05:aa00::/29	Jiri Tlapak
2a0a:10c0::/29	ISP Alliance a.s.
2a0d:1880::/29	Jiri Tlapak
2a0f:9300::/29	ISP Alliance a.s.
2a0f:fec0::/29	Jiri Tlapak
2a03:d840::/32	ISP Alliance a.s.
2a03:d840:fe02::/48	ISP Alliance a.s.

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WHOIS Details

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                                                ASHandle:       AS204666
                                                OrgID:          AS204666
                                                ASName:         AS204666
                                                ASNumber:       AS204666
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA

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Hosted Domains

There are 661 domain names hosted across 137 IP addresses on this ASN.

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IP Address	Domain	Domains on this IP
91.224.90.13	██████████	84
5.59.102.15	██████████	41
5.59.102.14	██████████	40
91.224.90.10	██████████	36
91.224.90.36	██████████	28
185.64.221.200	██████████	22
37.221.254.200	██████████	17
91.224.90.54	██████████	17
91.224.90.152	██████████	17
37.221.240.35	██████████	16

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Peers

There are 4 peers for this ASN.

Peers	Name
AS16019	Vodafone Czech Republic a.s.
AS197412	Jiri Tlapak
AS210436	IT Globe s.r.o.
AS47232	ISP Alliance a.s.

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ASN API & Database

Upstreams

There are 2 upstreams for this ASN.

upstreams	Name
AS16019	Vodafone Czech Republic a.s.
AS47232	ISP Alliance a.s.

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ASN API & Database

Downstreams

There are 2 downstreams for this ASN.

Downstreams	Name
AS197412	Jiri Tlapak
AS210436	IT Globe s.r.o.

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ASN API & Database

Pingable IPs

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

IP Address	ASN	Details
185.19.3.10	AS204666 Jiri Tlapak	`0.39ms` from Prague, CZ
185.188.100.1	AS204666 Jiri Tlapak	`7.10ms` from Prague, CZ
185.97.27.17	AS204666 Jiri Tlapak	`2.96ms` from Prague, CZ
45.153.194.17	AS204666 Jiri Tlapak	`0.24ms` from Prague, CZ
37.221.245.19	AS204666 Jiri Tlapak	`3.56ms` from Prague, CZ
37.221.252.10	AS204666 Jiri Tlapak	`1.46ms` from Prague, CZ
185.188.101.110	AS204666 Jiri Tlapak	`7.18ms` from Prague, CZ
185.19.0.194	AS204666 Jiri Tlapak	`1.85ms` from Prague, CZ
185.19.1.1	AS204666 Jiri Tlapak	`2.92ms` from Prague, CZ
185.243.173.1	AS204666 Jiri Tlapak	`0.30ms` from Prague, CZ
185.188.103.129	AS204666 Jiri Tlapak	`0.62ms` from Prague, CZ
185.97.26.2	AS204666 Jiri Tlapak	`2.48ms` from Prague, CZ
185.97.24.6	AS204666 Jiri Tlapak	`2.50ms` from Prague, CZ
37.221.248.5	AS204666 Jiri Tlapak	`4.02ms` from Prague, CZ
213.108.162.5	AS204666 Jiri Tlapak	`2.91ms` from Prague, CZ
185.74.60.72	AS204666 Jiri Tlapak	`1.36ms` from Prague, CZ
185.64.221.203	AS204666 Jiri Tlapak	`0.36ms` from Prague, CZ
185.243.172.65	AS204666 Jiri Tlapak	`0.31ms` from Prague, CZ
37.221.246.1	AS204666 Jiri Tlapak	`0.38ms` from Prague, CZ
45.153.192.222	AS204666 Jiri Tlapak	`2.35ms` from Prague, CZ
185.97.25.23	AS204666 Jiri Tlapak	`2.72ms` from Prague, CZ
85.255.90.193	AS204666 Jiri Tlapak	`0.43ms` from Prague, CZ
37.221.251.222	AS204666 Jiri Tlapak	`2.41ms` from Prague, CZ
185.243.174.228	AS204666 Jiri Tlapak	`2.84ms` from Prague, CZ
185.87.140.57	AS204666 Jiri Tlapak	`3.30ms` 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
47.40.250.74	AS20115 Charter Communications LLC	`11.89ms` from Atlanta, US
60.30.139.42	AS4837 CHINA UNICOM China169 Backbone	`5.50ms` from Beijing, CN
44.225.84.58	AS16509 Amazon.com, Inc.	`0.23ms` from Boardman, US
146.115.173.202	AS6079 RCN	`6.33ms` from Boston, US
218.104.179.10	AS17816 China Unicom IP network China169 Guangdong province	`3.79ms` from Guangzhou, CN
91.156.17.42	AS719 Elisa Oyj	`0.89ms` from Helsinki, FI
183.82.117.234	AS18209 Atria Convergence Technologies Ltd.,	`0.70ms` from Hyderabad, IN
78.136.73.234	AS29119 AIRE NETWORKS DEL MEDITERRANEO SL UNIPERSONAL	`0.43ms` from Madrid, ES
68.199.165.74	AS6128 Cablevision Systems Corp.	`7.38ms` from New York City, US
80.93.88.10	AS21409 Ikoula Net SAS	`0.06ms` from Reims, FR
191.57.81.122	AS4230 CLARO S.A.	`14.91ms` from Rio de Janeiro, BR
73.93.129.26	AS7922 Comcast Cable Communications, LLC	`6.01ms` from San Jose, US
32.142.107.250	AS7018 AT&T Enterprises, LLC	`1.29ms` from Santa Clara, US
211.114.121.10	AS38406 Kyeonggi-Do Hwaseong Office of Education	`2.18ms` from Seoul, KR
113.224.153.26	AS4837 CHINA UNICOM China169 Backbone	`2.31ms` from Tieling, CN
153.164.166.218	AS4713 NTT DOCOMO BUSINESS,Inc.	`3.69ms` from Tokyo, JP
20.116.149.26	AS8075 Microsoft Corporation	`0.19ms` from Toronto, CA
198.246.172.10	AS399305 Westinghouse Air Brake Technologies Corporation	`0.35ms` from Ashburn, US
222.35.74.10	AS24138 China TieTong Telecommunications Corporation	`1.72ms` from Beijing, CN
91.190.63.42	AS136787 PacketHub S.A.	`0.53ms` from Denver, US
60.170.197.154	AS4134 CHINANET BACKBONE	`9.68ms` from Huainan, CN
93.112.209.42	AS25019 Saudi Telecom Company JSC	`1.32ms` from Jeddah, SA
195.250.209.42	AS5603 Telekom Slovenije, d.d.	`0.58ms` from Ljubljana, SI
124.148.41.58	AS7545 TPG Telecom Limited	`11.14ms` from Melbourne, AU
195.103.145.218	AS3269 Telecom Italia S.p.A.	`1.83ms` from Milan, IT

Traceroute

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

traceroute -a -n -q1 -f2 -m22 85.255.88.61

traceroute to 85.255.88.61 (85.255.88.61): 22 hops max, 52 byte packets

2 [] 84.17.33.142 204.662 ms

3 *

4 [AS1299] 62.115.144.47 0.488 ms

5 [AS1273] 195.2.10.85 156.024 ms

6 [AS1273] 195.2.30.26 153.389 ms

7 *

8 [AS1273] 195.2.9.125 146.163 ms

9 [AS1273] 195.2.10.233 155.573 ms

10 [AS1273] 195.2.12.42 155.943 ms

11 [AS16019] 81.27.200.59 155.87 ms

12 [AS16019] 213.192.1.2 153.748 ms

13 *

14 [AS204666] 45.153.194.34 153.768 ms

15 *

16 [AS204666] 185.243.173.6 155.268 ms

17 *

18 *

19 [AS204666] 185.243.173.6 156.75 ms

20 *

21 *

22 *

Measurement taken from

IPinfo ProbeNet in Los Angeles, US

On April 13th 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 AS204666 at robtex.

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