81.6.128.0/21

AS30778 · Kielce University of Technology

Need more data or want to access it via API or data downloads? Sign up to get free access

Summary

Country	Poland
Domain	symetra.pl
ASN	AS30778
Registry	RIPE
ID	DX4-NETWORK

WHOIS Details

inetnum:        81.6.134.0 - 81.6.135.255
netname:        DX4-NETWORK
descr:          Symetra, www.dx4.pl
country:        PL
admin-c:        AW4504-RIPE
tech-c:         WW1362-RIPE
status:         ASSIGNED PA
mnt-by:         KUT-PL
created:        2006-10-24T14:11:05Z
last-modified:  2013-07-24T18:39:32Z
source:         RIPE
abuse-email:    abuse@man.kielce.pl
abuse-c:        KIE8-RIPE
abuse-org:      ORG-KUoT1-RIPE

person:         Anna Wojtowicz
address:        Kilinskiego 16
address:        28-100 Busko-Zdroj
address:        PL
phone:          +48 41 3808033
e-mail:         office@symetra.pl
nic-hdl:        AW4504-RIPE
mnt-by:         KUT-PL
created:        2013-07-24T18:39:32Z
last-modified:  2013-07-24T18:39:32Z
source:         RIPE

person:         Wojciech Wielogorski
address:        Kilinskiego 16
address:        28-100 Busko-Zdroj
address:        PL
phone:          +48 41 3808033
e-mail:         serwis@symetra.pl
nic-hdl:        WW1362-RIPE
mnt-by:         KUT-PL
created:        2013-07-24T18:39:32Z
last-modified:  2013-07-24T18:39:32Z
source:         RIPE

route:          81.6.128.0/21
descr:          Metropolitan Area Network KIELMAN
descr:          Kielce, POLAND
origin:         AS30778
remarks:        removed cross-nfy: TS408-RIPE
notify:         lir-tech@tu.kielce.pl
mnt-by:         KUT-PL
created:        2003-12-23T07:28:13Z
last-modified:  2004-01-30T16:29:40Z
source:         RIPE

Overlapping Ranges

BGP prefixes that are contained by 81.6.128.0/21

Range	ASN	Company	Num of IPs
81.6.133.0/24	AS209801	Virtual Future sp. z o.o.	256

Nearby Ranges

BGP prefixes that overlap with 81.6.0.0/16

Range	ASN	Company	Num of IPs
81.6.192.0/18	AS13285	TalkTalk Communications Limited	16,384
81.6.64.0/18	AS15897	Vodafone Telekomunikasyon A.S.	16,384
81.6.0.0/19	AS1836	green.ch AG	8,192
81.6.48.0/20	AS1836	green.ch AG	4,096
81.6.32.0/20	AS13030	Init7 (Switzerland) Ltd.	4,096
81.6.139.0/24	AS43386	N3T Projekt	256
81.6.140.0/24	AS43386	N3T Projekt	256
81.6.187.0/24	AS48227	Swietokrzyski Urzad Wojewodzki	256
81.6.136.0/24	AS208930	INTERBIT	256
81.6.133.0/24	AS209801	Virtual Future sp. z o.o.	256
81.6.136.0/24	AS30778	INTERBIT	256
81.6.140.0/24	AS30778	N3T Projekt	256

Hosted domains

There are no domains currently hosted on this ASN.

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

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

IP Address	ASN	Details
81.6.128.238	AS30778 Kielce University of Technology	`3.68ms` from Warsaw, PL

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
111.32.9.69	AS38019 tianjin Mobile Communication Company Limited	`3.04ms` from Beijing, CN
61.181.71.133	AS4837 CHINA UNICOM China169 Backbone	`5.29ms` from Beijing, CN
72.153.15.101	AS8075 Microsoft Corporation	`0.21ms` from Boydton, US
96.53.17.5	AS6327 Shaw Communications	`0.98ms` from Calgary, CA
39.160.169.53	AS56045 China Mobile communications corporation	`9.13ms` from Changsha, CN
20.236.115.245	AS8075 Microsoft Corporation	`0.30ms` from Chicago, US
95.208.13.165	AS3209 Vodafone GmbH	`10.13ms` from Frankfurt am Main, DE
92.39.120.5	AS32806 MTNSAT Holdings LLC	`6.58ms` from Frankfurt am Main, DE
87.170.45.69	AS3320 Deutsche Telekom AG	`6.10ms` from Frankfurt am Main, DE
95.114.132.85	AS6805 Telefonica Germany GmbH & Co.OHG	`9.12ms` from Frankfurt am Main, DE
20.87.252.37	AS8075 Microsoft Corporation	`0.14ms` from Johannesburg, ZA
188.37.113.133	AS12353 Vodafone Portugal	`5.83ms` from Lisbon, PT
87.115.101.213	AS6871 Plusnet	`4.41ms` from London, GB
212.81.165.53	AS3262 SAREnet, S.A.	`0.69ms` from Madrid, ES
24.103.27.197	AS12271 Charter Communications Inc	`1.82ms` from New York City, US
68.202.240.101	AS33363 Charter Communications, Inc	`10.07ms` from Orlando, US
190.141.230.5	AS18809 Cable Onda	`7.65ms` from Panama, PA
88.188.135.165	AS12322 Free SAS	`2.55ms` from Paris, FR
180.224.45.37	AS17858 LG POWERCOMM	`1.52ms` from Seoul, KR
121.172.215.133	AS4766 Korea Telecom	`1.21ms` from Seoul, KR
123.154.79.165	AS4837 CHINA UNICOM China169 Backbone	`11.77ms` from Shanghai, CN
51.16.249.165	AS16509 Amazon.com, Inc.	`1.34ms` from Tel Aviv, IL
130.34.94.133	AS2907 Research Organization of Information and Systems, National Institute of Informatics	`6.55ms` from Tokyo, JP
27.137.145.117	AS9824 JCOM Co., Ltd.	`12.70ms` from Tokyo, JP
102.153.29.37	AS327934 SOCIETE NATIONALE DES TELECOMMUNICATIONS (Tunisie Telecom)	`9.97ms` from Tunis, TN

Traceroute

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

traceroute -a -n -q1 -f2 -m12 81.6.131.218

traceroute to 81.6.131.218 (81.6.131.218): 12 hops max, 52 byte packets

2 [] 156.146.32.142 32.455 ms

3 [AS201011] 81.95.9.64 0.194 ms

4 [AS201011] 5.56.19.38 15.832 ms

5 *

6 *

7 [AS30778] 81.6.128.65 47.977 ms

8 [AS30778] 81.6.128.71 52.802 ms

9 [AS30778] 81.6.128.65 50.465 ms

10 *

11 *

12 *

Measurement taken from

IPinfo ProbeNet in Stockholm, SE

On November 22nd 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.

An API built with users in mind: reliable, accurate, and easy-to-use

Discover why industry-leading companies around the globe love our data. IPinfo's accurate insights fuel use cases from cybersecurity, data enrichment, web personalization, and much more.

Get Started for Free Contact Sales