77.78.88.0/23

AS21430 · WIA spol. s.r.o.

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Summary

Country	Czechia
Domain	casablanca.cz
ASN	AS21430
Registry	RIPE
ID	NET2U-CZ

WHOIS Details

inetnum:        77.78.89.0 - 77.78.89.255
netname:        Net2u-CZ
descr:          NET2U s.r.o.
country:        CZ
admin-c:        CASA3-RIPE
tech-c:         CASA3-RIPE
status:         ASSIGNED PA
mnt-by:         CASABLANCA-RIPE-MNT
mnt-by:         WIA-AS-MNT
created:        2009-09-02T07:39:46Z
last-modified:  2020-11-18T14:26:00Z
source:         RIPE
abuse-email:    abuse@wia.cz
abuse-c:        WAC9-RIPE
abuse-org:      ORG-Wss1-RIPE

role:           Casablanca INT RIPE manager
address:        Casablanca INT
address:        Vinohradska 184, Prague 3 - 130 52
address:        Czech republic
phone:          +420 270 000 270
fax-no:         +420 270 000 277
e-mail:         hostmaster@casablanca.cz
abuse-mailbox:  abuse@casablanca.cz
admin-c:        JH1771-RIPE
tech-c:         JH1771-RIPE
notify:         hostmaster@casablanca.cz
nic-hdl:        CASA3-RIPE
created:        2005-09-05T10:42:10Z
last-modified:  2015-07-03T11:19:49Z
source:         RIPE
mnt-by:         CASABLANCA-CORE-MNT

route:          77.78.88.0/22
descr:          CASA to WIA transfer
origin:         AS21430
mnt-by:         CASABLANCA-CORE-MNT
mnt-by:         WIA-AS-MNT
created:        2020-09-14T10:12:50Z
last-modified:  2020-09-14T10:12:50Z
source:         RIPE

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

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Useful for Cybersecurity

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Pingable IPs

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

IP Address	ASN	Details
77.78.88.157	AS21430 WIA spol. s.r.o.	`1.47ms` 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
217.165.237.7	AS5384 Emirates Internet	`2.29ms` from Al Fujairah City, AE
177.116.236.167	AS26599 TELEFÔNICA BRASIL S.A	`1.73ms` from Belo Horizonte, BR
192.52.65.7	AS3 Massachusetts Institute of Technology	`1.23ms` from Boston, US
139.218.117.167	AS9443 Vocus Retail	`1.77ms` from Brisbane, AU
40.116.74.231	AS8075 Microsoft Corporation	`0.54ms` from Chicago, US
34.31.246.55	AS396982 Google LLC	`0.13ms` from Council Bluffs, US
97.184.44.151	AS6167 Verizon Business	`19.85ms` from Dallas, US
3.67.185.71	AS16509 Amazon.com, Inc.	`0.16ms` from Frankfurt am Main, DE
2.100.202.247	AS13285 TalkTalk Communications Limited	`2.41ms` from London, GB
18.172.148.23	AS16509 Amazon.com, Inc.	`0.14ms` from London, GB
34.49.169.119	AS396982 Google LLC	`0.08ms` from Melbourne, AU
123.48.65.55	AS18126 Chubu Telecommunications Company, Inc.	`5.78ms` from Osaka, JP
186.194.210.71	AS262691 CONECTA LTDA.	`10.10ms` from Sao Paulo, BR
221.44.240.231	AS17676 SoftBank Corp.	`3.64ms` from Tokyo, JP
135.236.36.119	AS8075 Microsoft Corporation	`0.23ms` from Amsterdam, NL
23.79.26.23	AS16625 Akamai Technologies, Inc.	`0.48ms` from Atlanta, US
96.237.176.167	AS701 Verizon Business	`1.15ms` from Boston, US
24.63.109.135	AS7922 Comcast Cable Communications, LLC	`4.11ms` from Boston, US
71.68.43.199	AS11426 Charter Communications Inc	`8.48ms` from Charlotte, US
95.33.124.39	AS9145 EWE TEL GmbH	`6.06ms` from Hamburg, DE
217.39.32.23	AS2856 British Telecommunications PLC	`7.88ms` from London, GB
14.2.148.7	AS4739 Internode Pty Ltd	`13.03ms` from Melbourne, AU
202.17.149.103	AS2514 NTT PC Communications, Inc.	`5.40ms` from Osaka, JP
3.80.255.183	AS14618 Amazon.com, Inc.	`0.62ms` from Reston, US
104.168.193.71	AS54290 Hostwinds LLC.	`0.26ms` from Seattle, US

Traceroute

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

traceroute -a -n -q1 -f2 -m6 77.78.89.153

traceroute to 77.78.89.153 (77.78.89.153): 6 hops max, 52 byte packets

2 [AS29134] 217.31.48.15 0.508 ms

3 [] 91.210.16.28 0.59 ms

4 *

5 *

6 *

Measurement taken from

IPinfo ProbeNet in Prague, CZ

On August 28th 2025

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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