🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`172.21.ftth.classcom.pl`

DNSSEC	⚠️ Not signed
A	176.115.21.173^{🇵🇱 CLASSCOM-AS176.115.0.0/19 CLASSCOM}
		PTR	`173.21.ftth.classcom.pl`

`21.ftth.classcom.pl`

DNSSEC

⚠️ Not signed

Same first word

172.gg

172.me

172.lc

172.media

172.app

172.tm

172.zone

172.st

172.cz

172.ws

172.net

172.homes

172.pl

172.hk

172.co.uk

172.cam

172.ai

172.by

172.run

172.cx

172.lv

172.hr

172.sk

172.la

172.live

172.nl

172.su

172.at

172.workers.dev

172.ch

172.re

172.tv

172.im

172.fr

172.jp

172.best

172.org

172.in-addr.arpa

172.info

172.org.ph

172.net.cn

172.email

172.bio

172.in

172.wine

172.si

172.mx

172.network

172.com.au

172.ink

172.co

172.cc

172.ph

172.co.in

172.games

172.ir

172.com

172.one

172.aero

172.vc

172.io

172.eu

172.de

172.cn

172.rest

172.cl

172.us

172.it

172.lt

172.world

172.sd.cn

172.tw

172.org.uk

172.bj.cn

172.org.cn

172.es

172.uk

172.ru

172.ca

172.hk.cn

172.net.ph

172.kr

172.pages.dev

172.buzz

Similar names

127.at

127.games

127.co.jp

127.uk

721.sx

271.ph

721.io

712.hk

271.hu

721.us

127.nl

217.ru

127.xyz

721.f5.si

217.net

217.pages.dev

721.media

271.hk

127.(0x787878)

127.dev

712.wine

721.ph

271.jp

127.mx

217.life

127.uk.com

271.net.ph

721.cn

721.org.uk

721.de

712.im

127.wine

127.si

712.life

712.mba

217.fr

712.vin

712.technology

217.cm

721.ru

271.co.uk

217.bio

271.top

217.at

127.run

127.com.es

712.tw

721.bio

127.homes

271.es

127.lt

712.co.in

271.me

712.eu

721.wine

712.casino

127.io

127.ink

712.lt

127.kz

217.workers.dev

712.bet

217.ro

217.it

127.tm

712.today

271.pages.dev

217.la

712.com.cn

127.biz

271.nl

271.cn.com

271.spb.ru

271.com

271.ch

721.by

127.wiki

127.world

217.org.uk

127.net.ph

217.us

271.co.in

127.ath.cx

127.buzz

Previous names

Next names

DNS History

1 record (1 active, 0 former)

●A176.115.21.1732017-05-26 → 2026-10-18 · 2 obs

● 2017-05-26 17:24:00
● 2026-10-18 07:08:24

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
pl	a-dns.pl, b-dns.pl, d-dns.pl, f-dns.pl...	12 records
classcom.pl	dns.classcom.pl, dns2.classcom.pl	4 records

✅ Authoritative Response

Server:195.150.77.18

NS records: dns.classcom.pl, dns2.classcom.pl

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

Root DNSKEY fetch failed: Error: connect EADDRNOTAVAIL 198.41.0.4:53 - Local (0.0.0.0:0)

⏱️ Timing

Total: 424ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`176.115.21.173`

📌 Glue Records Collected

Total: 16

In-bailiwick: 16 (a-dns.pl, a-dns.pl, b-dns.pl...)

Analysis

IP Addresses

172.21.ftth.classcom.pl resolves to just one IP address, 176.115.21.173.

172.21.ftth.classcom.pl - robtex.com