`c21.guru`

DNSSEC	⚠️ Not signed
A	2607:f1c0:1000:7029:c3af:adc8:f458:202c^{🇺🇸 IONOS-AS2607:f1c0::/32 1&1 Internet Inc. 701 Lee Rd, Suite 300 Chesterbrook, PA 19087 US}
		PTR	`perfora.net`
A	74.208.215.249^{🇺🇸 IONOS-AS74.208.0.0/16 IONOS Inc.}
NS	`ns1056.ui-dns.org` ⭐
		A	2001:8d8:fe:53:0:d9a0:5338:100^{🇩🇪 IONOS-AS2001:8d8:fe::/47 IONOS AS8560 anycast more specific}
			PTR	`ns1056.ui-dns.org`
		A	217.160.83.56^{🇩🇪 IONOS-AS217.160.80.0/22 AS8560 anycast more specific}
			PTR	`ns1056.ui-dns.org`
NS	`ns1044.ui-dns.de`
		A	2001:8d8:fe:53:0:d9a0:502c:100^{🇩🇪 IONOS-AS2001:8d8:fe::/47 IONOS AS8560 anycast more specific}
			PTR	`ns1044.ui-dns.de`
		A	217.160.80.44^{🇩🇪 IONOS-AS217.160.80.0/22 AS8560 anycast more specific}
			PTR	`ns1044.ui-dns.de`
NS	`ns1090.ui-dns.com`
		A	2001:8d8:fe:53:0:d9a0:525a:100^{🇩🇪 IONOS-AS2001:8d8:fe::/47 IONOS AS8560 anycast more specific}
			PTR	`ns1090.ui-dns.com`
		A	217.160.82.90^{🇩🇪 IONOS-AS217.160.80.0/22 AS8560 anycast more specific}
			PTR	`ns1090.ui-dns.com`
NS	`ns1108.ui-dns.biz`
		A	2001:8d8:fe:53:0:d9a0:516c:100^{🇩🇪 IONOS-AS2001:8d8:fe::/47 IONOS AS8560 anycast more specific}
			PTR	`ns1108.ui-dns.biz`
		A	217.160.81.108^{🇩🇪 IONOS-AS217.160.80.0/22 AS8560 anycast more specific}
			PTR	`ns1108.ui-dns.biz`
MX	`mx00.ionos.com` ⭐
		A	74.208.5.3^{🇺🇸 IONOS-AS74.208.0.0/16 IONOS Inc.}
			PTR	`mx00.perfora.net`
MX	`mx01.ionos.com` ⭐
		A	74.208.5.21^{🇺🇸 IONOS-AS74.208.0.0/16 IONOS Inc.}
			PTR	`mx01.perfora.net`
TXT	`v=spf1 include:_spf-us.ionos.com ~all`
SOA	`ns1056.ui-dns.org`hostmaster@1and1.com 2018-05-31 #23

`guru`

	DNSSEC	🔒 Signed (DS record present)
	NS	`v0n0.nic.guru` ⭐
	NS	`v0n1.nic.guru`
	NS	`v0n2.nic.guru`
	NS	`v0n3.nic.guru`
	NS	`v2n0.nic.guru`
	NS	`v2n1.nic.guru`
	SOA	`v0n0.nic.guru`hostmaster@donuts.email serial=1778689589

Same first word

c21.it

c21.com.hk

c21.asia

c21.si

c21.at

c21.ir

c21.online

c21.mx

c21.cn

c21.name

c21.pt

c21.ca

c21.gr

c21.sk

c21.eu

c21.hk

c21.fr

c21.us

c21.dk

c21.nl

c21.xyz

c21.net.cn

c21.com.tr

c21.ro

c21.ae

c21.tech

c21.homes

c21.al

c21.co

c21.hr

c21.com.br

c21.pe

c21.com.cy

c21.com.vn

c21.com.cn

c21.to

c21.site

c21.gy

c21.mn

c21.pl

c21.tw

c21.me

c21.be

c21.properties

c21.com.pe

c21.azureedge.net

c21.com

c21.com.sg

c21.cz

c21.bz

c21.net

c21.nyc

c21.guru

c21.vn

c21.com.bo

c21.info

c21.in

c21.tv

c21.ru

c21.biz

c21.one

Similar names

21c.pl

1c2.eu

c12.pl

21c.de

c12.cn

12c.no

21c.email

21c.co.uk

1c2.mobi

1c2.de

2c1.de

c12.com.au

c12.me

21c.co.in

12c.com

12c.me

c12.it

21c.or.kr

21c.nl

c12.in

21c.xin

c12.fr

c12.dk

2c1.fr

21c.cn

21c.me

21c.ru

1c2.me

21c.co.jp

1c2.com.cn

c12.com

c12.kr

c12.nl

21c.it

1c2.net

12c.in

12c.co.uk

12c.eu

c12.com.br

2c1.com

c12.tv

2c1.net

c12.ca

21c.com

1c2.fr

12c.org

21c.org

12c.cn

12c.io

21c.jp

12c.com.cn

c12.ru

DNS History

11 records (8 active, 3 former)

○NSns1.fnistools.com2016-12-10 → 2016-12-10 · 3 obs

● 2016-12-10 23:37:00
○ 2026-05-05 12:20:20
○ 2026-05-13 17:03:52

●NSns1044.ui-dns.de2026-05-05 → 2026-05-13 · 3 obs

○ 2016-12-10 23:37:00
● 2026-05-05 12:20:20
● 2026-05-13 17:03:52

●NSns1056.ui-dns.org2026-05-05 → 2026-05-13 · 3 obs

○ 2016-12-10 23:37:00
● 2026-05-05 12:20:20
● 2026-05-13 17:03:52

●NSns1090.ui-dns.com2026-05-05 → 2026-05-13 · 3 obs

○ 2016-12-10 23:37:00
● 2026-05-05 12:20:20
● 2026-05-13 17:03:52

●NSns1108.ui-dns.biz2026-05-05 → 2026-05-13 · 3 obs

○ 2016-12-10 23:37:00
● 2026-05-05 12:20:20
● 2026-05-13 17:03:52

○NSns2.fnistools.com2016-12-10 → 2016-12-10 · 3 obs

● 2016-12-10 23:37:00
○ 2026-05-05 12:20:20
○ 2026-05-13 17:03:52

●MXmx00.ionos.com2026-05-05 → 2026-05-13 · 2 obs

● 2026-05-05 12:20:20
● 2026-05-13 17:03:52

●MXmx01.ionos.com2026-05-05 → 2026-05-13 · 2 obs

● 2026-05-05 12:20:20
● 2026-05-13 17:03:52

○A208.93.240.772016-12-10 → 2016-12-10 · 3 obs

● 2016-12-10 23:37:00
○ 2026-05-05 12:20:20
○ 2026-05-13 17:03:52

●A2607:f1c0:1000:7029:c3af:adc8:f458:202c2026-05-05 → 2026-05-13 · 3 obs

○ 2016-12-10 23:37:00
● 2026-05-05 12:20:20
● 2026-05-13 17:03:52

●A74.208.215.2492026-05-05 → 2026-05-13 · 3 obs

○ 2016-12-10 23:37:00
● 2026-05-05 12:20:20
● 2026-05-13 17:03:52

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
guru	v0n2.nic.guru, v2n1.nic.guru, v2n0.nic.guru, v0n1.nic.guru...	12 records
c21.guru	ns1090.ui-dns.com, ns1044.ui-dns.de, ns1056.ui-dns.org, ns1108.ui-dns.biz	-

✅ Authoritative Response

Server:217.160.83.56

NS records: ns1090.ui-dns.com, ns1044.ui-dns.de, ns1056.ui-dns.org, ns1108.ui-dns.biz

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for c21.guru (unsigned zone)

⏱️ Timing

Total: 822ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`74.208.215.249`
AAAA	1	`2607:f1c0:1000:7029:c3af:adc8:f458:202c`
NS	4	`ns1044.ui-dns.de, ns1090.ui-dns.com...`
MX	2	`mx01.ionos.com (pri: 10), mx00.ionos.com (pri: 10)`
TXT	1	`v=spf1 include:_spf-us.ionos.com ~all`
SOA	1	`ns1056.ui-dns.org hostmaster.1and1.com`

📌 Glue Records Collected

Total: 12

In-bailiwick: 12 (v0n0.nic.guru, v0n1.nic.guru, v0n2.nic.guru...)

Analysis

IP Addresses

c21.guru points to two IPs: 2607:f1c0:1000:7029:c3af:adc8:f458:202c and 74.208.215.249.

Other host names, for instance roleplayingbooks.com, manttache.com, qootv.com, instalite.net and jadacowan.com share IP numbers with c21.guru.

Name Servers

c21.guru is delegated to four name servers: ns1108.ui-dns.biz, ns1090.ui-dns.com, ns1044.ui-dns.de and ns1056.ui-dns.org.

c21.guru at least partially shares name servers with other domains such as bragenzer.com, felsch.info, arabfc.net, avenergia.com and uviaus.net.