37.221.243.0/24

AS204666 · Jiri Tlapak

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Summary

Country	Czechia
Domain	tlapnet.cz
ASN	AS204666
Parent Range	37.221.240.0/20
Registry	RIPE
ID	TLAPNET-CASLAV

WHOIS Details

inetnum:        37.221.240.0 - 37.221.243.255
netname:        TLAPNET-Caslav
descr:          Caslav - Tlapnet s.r.o.
country:        CZ
admin-c:        TA7655-RIPE
tech-c:         TA7655-RIPE
abuse-c:        TA7655-RIPE
org:            ORG-TS210-RIPE
status:         ASSIGNED PA
mnt-by:         TLAPNET-MNT
created:        2013-02-16T15:59:21Z
last-modified:  2020-08-22T13:09:11Z
source:         RIPE
abuse-email:    servis@tlapnet.cz
abuse-c:        TA7655-RIPE
abuse-org:      ORG-TS210-RIPE

organisation:   ORG-TS210-RIPE
org-name:       Tlapnet s.r.o.
country:        CZ
org-type:       OTHER
address:        U Schodu 122/5
address:        Praha 9, PS? 190 00
e-mail:         info@tlapnet.cz
abuse-c:        AC32880-RIPE
mnt-ref:        TLAPNET-MNT
mnt-by:         MNT-GRAPESC
created:        2013-09-13T16:49:47Z
last-modified:  2022-12-01T17:28:33Z
source:         RIPE

role:           Tlapnet
address:        U schodu 122/5
address:        190 00 Praha 9
e-mail:         info@tlapnet.cz
abuse-mailbox:  servis@tlapnet.cz
nic-hdl:        TA7655-RIPE
mnt-by:         TLAPNET-MNT
created:        2020-08-22T13:07:56Z
last-modified:  2020-08-22T13:11:39Z
source:         RIPE

route:          37.221.240.0/20
descr:          TLAPNET
origin:         AS198668
mnt-by:         TLAPNET-MNT
created:        2013-07-04T13:36:59Z
last-modified:  2013-07-04T13:36:59Z
source:         RIPE

Overlapping Ranges

BGP prefixes that contain 37.221.243.0/24

Range	ASN	Company	Num of IPs
37.221.240.0/20	AS204666	ISP Alliance a.s.	4,096

Nearby Ranges

BGP prefixes that overlap with 37.221.0.0/16

Range	ASN	Company	Num of IPs
37.221.0.0/18	AS206065	Tose'h Fanavari Ertebabat Pasargad Arian Co. PJS	16,384
37.221.128.0/19	AS62384	Nataliya Vasylivna Protsykevych	8,192
37.221.240.0/20	AS204666	ISP Alliance a.s.	4,096
37.221.144.0/20	AS62384	Radio Service Ltd.	4,096
37.221.128.0/20	AS62384	Radio Service Ltd.	4,096
37.221.216.0/21	AS51514	Spotler Limited	2,048
37.221.232.0/21	AS198760	Quattre Internet SL	2,048
37.221.224.0/21	AS198965	itm8 Sverige AB	2,048
37.221.208.0/21	AS41075	ATW Internet Kft.	2,048
37.221.192.0/21	AS197540	netcup GmbH	2,048
37.221.100.0/22	AS198537	Kamil Turon trading as KAMNET	1,024
37.221.88.0/22	AS201730	Cloud4com s.r.o.	1,024
37.221.104.0/22	AS34244	Teleservice Bredband Skane AB	1,024
37.221.196.0/22	AS197540	netcup GmbH	1,024
37.221.192.0/22	AS197540	netcup GmbH	1,024
37.221.120.0/22	AS210218	Open Fiber S.P.A.	1,024
37.221.200.0/23	AS8492	OBIT Ltd.	512
37.221.172.0/23	AS3223	The entire subnet is used for shared hosting by	512
37.221.82.0/23	AS49505	Riserank Sp. z o.o.	512
37.221.77.0/24	AS211851	Web9 Bilisim ve Yazilim Hizmetleri	256
37.221.80.0/24	AS212667	Online Connect Ltd	256
37.221.111.0/24	AS30475	Beyond Tomorrow Ltd	256
37.221.110.0/24	AS33185	Beyond Tomorrow Ltd	256
37.221.117.0/24	AS35236	IXOXI s.r.o.	256
37.221.84.0/24	AS39305	MEDIA COMMUNICATION IDF S.A.R.L.	256
37.221.85.0/24	AS39305	MEDIA COMMUNICATION IDF S.A.R.L.	256
37.221.86.0/24	AS39305	MEDIA COMMUNICATION IDF S.A.R.L.	256
37.221.202.0/24	AS43370	OBIT-telecommunications, LLC	256
37.221.207.0/24	AS43370	OBIT-telecommunications, LLC	256
37.221.81.0/24	AS48031	IT Hostline Ltd	256
37.221.116.0/24	AS48131	IXOXI s.r.o.	256
37.221.68.0/24	AS49121	Infinity Telecom	256
37.221.69.0/24	AS49121	Infinity Telecom, s.r.o.	256
37.221.71.0/24	AS49121	Infinity Telecom, s.r.o.	256
37.221.92.0/24	AS49581	Ferdinand Zink trading as Tube-Hosting	256
37.221.94.0/24	AS49581	Ferdinand Zink trading as Tube-Hosting	256
37.221.108.0/24	AS53340	Beyond Tomorrow Ltd	256
37.221.78.0/24	AS57397	STERLY VERI MERKEZI YAZILIM VE SIBER GUVENLIK HIZMETLERI A.S.	256
37.221.187.0/24	AS58084	Newcontact Ltd	256
37.221.188.0/24	AS58084	Newcontact Ltd	256
37.221.189.0/24	AS58084	Newcontact Ltd	256
37.221.191.0/24	AS58084	Newcontact Ltd	256
37.221.93.0/24	AS58087	Datalix	256
37.221.180.0/24	AS60861	Redcat d.o.o. Podgorica	256
37.221.98.0/24	AS62007	Retelit Digital Services S.p.A.	256
37.221.203.0/24	AS8492	Obit, Ltd.	256
37.221.206.0/24	AS8492	Obit, Ltd.	256
37.221.112.0/24	AS9009	M247 Miami Infrastructure	256
37.221.113.0/24	AS9009	M247 LTD London Infrastructure	256
37.221.114.0/24	AS9009	M247 LTD Frankfurt Infrastructure	256

Hosted domains

There are 3 domain names hosted across 3 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
37.221.243.57	smrz.name	1
37.221.243.99	pongovi.cz	1
37.221.243.33	marpo.org	1

Hosted domains API

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Pingable IPs

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

IP Address	ASN	Details
37.221.243.5	AS204666 Jiri Tlapak	`1.46ms` 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
3.225.216.136	AS14618 Amazon.com, Inc.	`0.51ms` from Ashburn, US
67.202.3.168	AS14618 Amazon.com, Inc.	`0.48ms` from Ashburn, US
162.225.187.216	AS7018 AT&T Enterprises, LLC	`11.46ms` from Chicago, US
43.199.2.216	AS16509 Amazon.com, Inc.	`0.11ms` from Hong Kong, HK
166.104.35.120	AS9321 Hanyang University	`1.56ms` from Incheon, KR
46.249.8.232	AS34456 Rial Com JSC	`1.39ms` from Moscow, RU
23.46.164.72	AS1680 Cellcom Fixed Line Communication L.P	`0.85ms` from Rosh Ha‘Ayin, IL
58.125.164.168	AS9318 SK Broadband Co Ltd	`5.99ms` from Seoul, KR
202.67.94.72	AS9443 Vocus Retail	`3.68ms` from Sydney, AU
31.62.61.136	AS5617 Orange Polska Spolka Akcyjna	`14.79ms` from Warsaw, PL
44.192.126.8	AS14618 Amazon.com, Inc.	`0.72ms` from Ashburn, US
3.161.194.72	AS16509 Amazon.com, Inc.	`0.22ms` from Atlanta, US
34.96.22.248	AS396982 Google LLC	`0.51ms` from Council Bluffs, US
84.148.223.120	AS3320 Deutsche Telekom AG	`7.82ms` from Duesseldorf, DE
68.149.66.232	AS6327 Shaw Communications	`4.67ms` from Edmonton, CA
67.164.83.56	AS7922 Comcast Cable Communications, LLC	`10.06ms` from Fremont, US
187.201.80.72	AS8151 UNINET	`1.12ms` from Guadalajara, MX
59.95.3.248	AS9829 National Internet Backbone	`11.59ms` from Mumbai, IN
126.34.137.168	AS17676 SoftBank Corp.	`3.51ms` from Osaka, JP
179.181.74.56	AS18881 TELEFÔNICA BRASIL S.A	`3.21ms` from Osasco, BR
78.80.183.104	AS13036 T-Mobile Czech Republic a.s.	`1.10ms` from Prague, CZ
151.77.65.152	AS1267 WIND TRE S.P.A.	`6.58ms` from Rome, IT
37.232.161.120	AS12714 PJSC MegaFon	`10.89ms` from Samara, RU
77.91.12.200	AS35378 Sat Film Sp. z o.o.	`8.24ms` from Warsaw, PL
82.168.81.184	AS1136 KPN B.V.	`3.07ms` from Amsterdam, NL

Traceroute

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

traceroute -a -n -q1 -f4 37.221.243.5

traceroute to 37.221.243.5 (37.221.243.5): 64 hops max, 52 byte packets

4 [AS16019] 213.192.1.6 0.474 ms

5 *

6 [AS204666] 37.221.243.5 1.534 ms

Measurement taken from

IPinfo ProbeNet in Prague, CZ

On March 20th 2026

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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