81.201.56.0/21

AS8251 · FreeTel, s.r.o.

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Summary

Country	Czechia
Domain	pilsfree.net
ASN	AS8251
Registry	RIPE
ID	PILSFREENFX

WHOIS Details

inetnum:        81.201.56.0 - 81.201.59.255
netname:        PILSFREENFX
org:            ORG-Po8-RIPE
geoloc:         49.7477831 13.3783489
descr:          Pilsfree.net member workstations
country:        CZ
admin-c:        MUKI
tech-c:         MUKI
mnt-irt:        IRT-PILSFREE
status:         ASSIGNED PA
mnt-by:         CZNFX-MNT
created:        2007-02-24T21:51:37Z
last-modified:  2015-09-06T12:27:36Z
source:         RIPE
abuse-email:    abuse@pilsfree.net
abuse-c:        PFA-RIPE
abuse-org:      ORG-Po8-RIPE

organisation:   ORG-Po8-RIPE
org-name:       PilsFree, z.s.
abuse-c:        PFA-RIPE
admin-c:        muki
org-type:       OTHER
address:        Tachovska 41, 323 00 Plzen, Czech Republic
e-mail:         info@pilsfree.net
mnt-ref:        muki-mnt
mnt-by:         muki-mnt
created:        2007-09-15T21:13:43Z
last-modified:  2017-10-30T14:51:28Z
source:         RIPE

person:         Pavel Muknsnabl
address:        Tachovska 41, Plzen, CZ
e-mail:         ripe@muki.cz
phone:          +420775163264
nic-hdl:        muki
created:        2007-02-15T09:11:11Z
last-modified:  2017-10-30T21:53:57Z
source:         RIPE
mnt-by:         muki-mnt

route:          81.201.56.0/21
descr:          Neutral Free eXchange members - FreeTel alternate
origin:         AS41711
mnt-by:         CZNFX-MNT
created:        2016-11-02T08:10:39Z
last-modified:  2016-11-02T08:10:39Z
source:         RIPE

route:          81.201.56.0/21
descr:          Neutral Free eXchange members
origin:         AS8251
mnt-by:         CZNFX-MNT
created:        2007-02-05T10:56:15Z
last-modified:  2010-06-22T07:35:51Z
source:         RIPE

Nearby Ranges

BGP prefixes that overlap with 81.201.0.0/16

Range	ASN	Company	Num of IPs
81.201.224.0/20	AS12923	Wizard Computersysteme GmbH	4,096
81.201.144.0/20	AS16205	DSI GmbH Daten Service Informationssysteme	4,096
81.201.240.0/20	AS21365	MTS PJSC	4,096
81.201.0.0/20	AS25305	Albedo S.r.l.	4,096
81.201.192.0/20	AS25353	BAR Informatik AG	4,096
81.201.32.0/20	AS3320	Marschall Electronics GmbH & Co. KG	4,096
81.201.80.0/20	AS41135	Voxbone SA	4,096
81.201.176.0/20	AS41157	Oxymium SARL	4,096
81.201.208.0/20	AS57829	Iver Sverige AB	4,096
81.201.128.0/20	AS61323	ANS ACADEMY LIMITED	4,096
81.201.16.0/20	AS8359	MTS PJSC	4,096
81.201.89.0/24	AS41135	Voxbone worldwide VOIP backbone	256
81.201.95.0/24	AS41135	Voxbone worldwide VOIP backbone	256
81.201.88.0/24	AS41135	Voxbone worldwide VOIP backbone	256
81.201.92.0/24	AS41135	Voxbone worldwide VOIP backbone	256
81.201.93.0/24	AS41135	Voxbone worldwide VOIP backbone	256
81.201.84.0/24	AS41135	Voxbone worldwide VOIP backbone	256
81.201.94.0/24	AS41135	Voxbone worldwide VOIP backbone	256
81.201.85.0/24	AS41135	Voxbone worldwide VOIP backbone	256
81.201.83.0/24	AS41135	Voxbone worldwide VOIP backbone	256
81.201.91.0/24	AS41135	Voxbone worldwide VOIP backbone	256
81.201.163.0/24	AS29575	Reuters LAN	256
81.201.164.0/24	AS29575	Reuters LAN	256
81.201.80.0/24	AS41135	Voxbone SA	256
81.201.87.0/24	AS41135	Voxbone worldwide VOIP backbone	256
81.201.86.0/24	AS41135	Voxbone SA	256
81.201.82.0/24	AS41135	Voxbone worldwide VOIP backbone	256

Hosted domains

There are 228 domain names hosted across 102 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
81.201.60.150	spelina.net	34
81.201.62.20	pohrebnisluzbarequiem.cz	11
81.201.58.168	akmarik.cz	11
81.201.56.243	udernik.net	10
81.201.61.25	mh2netict.cz	9
81.201.61.194	usmevavyucitel.cz	8
81.201.60.138	pilsfree.net	6
81.201.63.18	snerovadla.cz	5
81.201.63.17	starlaces.eu	4
81.201.61.200	gcmc.cz	4
81.201.58.33	microhobby.org	4
81.201.59.63	pocitace-plzen.cz	4
81.201.59.159	charlieblog.cz	4
81.201.56.75	cyril-oak.eu	3
81.201.61.26	mhbox.cz	3
81.201.59.87	jankus.cz	3
81.201.57.164	milandavidek.cz	3
81.201.63.13	profiadministrativa.cz	3
81.201.56.53	banknotes.cz	3
81.201.59.29	time4it.cz	2

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.

Useful for Cybersecurity

Read more

Pingable IPs

1,097 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
81.201.58.0	AS8251 FreeTel, s.r.o.	`2.27ms` from Prague, CZ
81.201.63.30	AS8251 FreeTel, s.r.o.	`3.24ms` from Prague, CZ
81.201.57.176	AS8251 FreeTel, s.r.o.	`2.33ms` from Prague, CZ
81.201.60.14	AS8251 FreeTel, s.r.o.	`0.70ms` from Prague, CZ
81.201.61.39	AS8251 FreeTel, s.r.o.	`2.40ms` from Prague, CZ
81.201.56.226	AS8251 FreeTel, s.r.o.	`2.32ms` from Prague, CZ
81.201.59.40	AS8251 FreeTel, s.r.o.	`2.36ms` from Prague, CZ
81.201.62.30	AS8251 FreeTel, s.r.o.	`4.63ms` 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
77.167.161.229	AS1136 KPN B.V.	`6.73ms` from Amsterdam, NL
17.156.216.5	AS714 Apple Inc.	`10.94ms` from Ashburn, US
171.221.172.165	AS4134 CHINANET-BACKBONE	`2.05ms` from Chengdu, CN
76.150.10.213	AS7922 Comcast Cable Communications, LLC	`4.94ms` from Chicago, US
75.186.119.229	AS10796 Charter Communications Inc	`10.96ms` from Columbus, US
158.41.173.197	AS1448 United Cooperative Services	`3.14ms` from Dallas, US
177.73.79.5	AS262769 AVANZA TELECOM LTDA	`19.79ms` from Fortaleza, BR
175.123.69.197	AS9318 SK Broadband Co Ltd	`5.20ms` from Incheon, KR
84.68.230.117	AS5378 Vodafone Limited	`8.49ms` from Manchester, GB
128.184.36.101	AS7645 Deakin University	`1.34ms` from Melbourne, AU
128.112.187.37	AS88 Princeton University	`2.79ms` from New York City, US
87.185.232.245	AS3320 Deutsche Telekom AG	`5.56ms` from Nuernberg, DE
18.229.171.181	AS16509 Amazon.com, Inc.	`0.13ms` from Osasco, BR
179.119.82.149	AS26599 TELEFÔNICA BRASIL S.A	`1.67ms` from Sao Paulo, BR
191.61.100.37	AS4230 CLARO S.A.	`1.25ms` from Sao Paulo, BR
54.64.225.21	AS16509 Amazon.com, Inc.	`0.18ms` from Tokyo, JP
143.189.247.165	AS2527 Sony Network Communications Inc.	`1.60ms` from Tokyo, JP
75.109.27.53	AS19108 Optimum	`13.78ms` from Ashburn, US
73.81.25.5	AS7922 Comcast Cable Communications, LLC	`4.73ms` from Ashburn, US
76.24.1.53	AS7922 Comcast Cable Communications, LLC	`8.88ms` from Boston, US
217.224.178.85	AS3320 Deutsche Telekom AG	`3.20ms` from Hamburg, DE
183.143.232.21	AS4134 CHINANET-BACKBONE	`7.83ms` from Hangzhou, CN
31.7.35.181	AS7768 Nuh Ahmet Firat trading as TEKNET YAZILIM VE BILGISAYAR TEKNOLOJILERI	`16.82ms` from Izmir, TR
144.129.32.149	AS33363 Charter Communications, Inc	`9.35ms` from Los Angeles, US
35.196.210.213	AS396982 Google LLC	`0.13ms` from Moncks Corner, US

Traceroute

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

traceroute -a -n -q1 -f4 81.201.58.148

traceroute to 81.201.58.148 (81.201.58.148): 64 hops max, 52 byte packets

4 [] 91.210.16.74 0.748 ms

5 [AS8251] 78.108.106.9 2.559 ms

6 [AS8251] 81.201.58.148 2.277 ms

Measurement taken from

IPinfo ProbeNet in Prague, CZ

On March 29th 2026

What are IP address ranges?

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