🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`151.21.ftth.classcom.pl`

DNSSEC	⚠️ Not signed
A	176.115.21.151^{🇵🇱 CLASSCOM-AS176.115.0.0/19 CLASSCOM}
		PTR	`151.21.ftth.classcom.pl`

`21.ftth.classcom.pl`

DNSSEC

⚠️ Not signed

PTR for

151.21.115.176.in-addr.arpa

Same first word

151.digital

151.dk

151.freeboxos.fr

151.tel

151.hu

151.net

151.in-addr.arpa

151.fr

151.pl

151.wine

151.am

151.life

151.uk

151.me

151.ca

151.bg

151.co.in

151.us

151.mx

151.cx

151.co.nz

151.la

151.live

151.im

151.com.hk

151.lu

151.capital

151.cz

151.bz

151.hk

151.run

151.ru

151.es

151.lc

151.bio

151.ws

151.fi

151.tw

151.com.ph

151.one

151.homes

151.lat

151.io

151.at

151.ph

151.by

151.pm

151.kz

151.uz

151.ie

151.org.uk

151.gr

151.app

151.co.il

151.co.uk

151.pages.dev

151.workers.dev

151.rs

151.jp

151.ai

151.ink

151.com.au

151.de

151.bet

151.quest

151.to

151.mk

151.ag

151.cam

151.cards

151.vc

151.cn

151.tm

151.llc

151.ir

151.ro

151.st

151.nl

151.net.ph

151.tv

151.pp.ua

151.nz

151.fun

151.ch

151.si

151.no

151.org

151.vg

151.com.cn

151.eu

151.cl

151.ae

151.info

151.com

Similar names

511.pt

511.md

115.studio

115.bar

115.uk

115.zone

115.su

115.co.jp

115.lt

511.army

511.wine

115.lol

511.online

511.at

115.pl

511.kr

115.com

115.mom

511.vercel.app

115.freeboxos.fr

115.org

511.jp

115.io.vn

115.hamburg

511.be

115.us.kg

511.global

115.live

115.se

115.us

511.lc

511.vg

511.co.kr

115.trafficmanager.net

115.im

511.de

115.ru.com

511.cam

511.fi

115.run

511.sk

115.bz

511.store

511.shop

511.consulting

115.ag

115.cash

115.tm

511.au

115.ltd

511.ch

115.kr

511.co

115.pp.ua

511.im

115.onl

511.io

115.top

115.game

511.cc

115.net.ph

511.company

Previous names

Next names

DNS History

1 record (1 active, 0 former)

●A176.115.21.1512017-07-17 → 2026-10-18 · 2 obs

● 2017-07-17 17:26:36
● 2026-10-18 03:39:56

🔍 DNS Trace

📋 Delegation Chain

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

✅ Authoritative Response

Server:195.150.77.18

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for classcom.pl (unsigned zone)

⏱️ Timing

Total: 575ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`176.115.21.151`

📌 Glue Records Collected

Total: 16

In-bailiwick: 16 (j-dns.pl, h-dns.pl, f-dns.pl...)

Analysis

IP Addresses

151.21.ftth.classcom.pl directs to one IP number, which is 176.115.21.151.

151.21.ftth.classcom.pl - robtex.com