back2back.nu - dns.ninja

`back2back.nu`

DNSSEC	🔒 Signed (DS record present)
A	185.20.205.69^{🇩🇰 team-blue-denmark185.20.204.0/22}
		PTR	`linux393.unoeuro.com`
NS	`ns1.simply.com` ⭐
		A	2a02:2339:1:15c::4562:4562^{🇩🇰 team-blue-denmark2a02:2339::/36}
			PTR	`ns1.simply.com`
		A	91.197.248.78^{🇩🇰 team-blue-denmark91.197.248.0/22}
			PTR	`ns1.simply.com`
NS	`ns2.simply.com`
		A	2a02:2339:4006:101::4562:4562^{🇩🇰 team-blue-denmark2a02:2339:4000::/34}
			PTR	`ns2.simply.com`
		A	185.25.141.15^{🇩🇰 team-blue-denmark185.25.141.0/24 Zitcom A/S}
			PTR	`ns2.simply.com`
NS	`ns3.simply.com`
		A	91.197.248.79^{🇩🇰 team-blue-denmark91.197.248.0/22}
			PTR	`ns3.simply.com`
NS	`ns4.simply.com`
		A	91.197.248.80^{🇩🇰 team-blue-denmark91.197.248.0/22}
			PTR	`ns4.simply.com`
MX	`mx.simply.com` ⭐
		A	94.231.106.20^{🇩🇰 team-blue-denmark94.231.96.0/20 ZITCOM A/S}
			PTR	`mx.simply.com`
TXT	`v=spf1 include:spf.simply.com -all`
SOA	`ns1.simply.com`hostmaster@simply.com 2025-04-23 #0

`nu`

	DNSSEC	🔒 Signed (DS record present)
	NS	`catcher-in-the-rye.nic.nu` ⭐
	NS	`a.ns.nu`
	NS	`c.ns.nu`
	NS	`d.ns.nu`
	NS	`m.ns.nu`
	NS	`y.ns.nu`
	NS	`z.ns.nu`
	TXT	`NU zone update: 2026-06-19 00:50:03 +0000 (EPOCH 1781830203) (auto)`
	TXT	`id:f01f28fd-3af5-4dcc-93f2-0a633efdb13a`
	SOA	`catcher-in-the-rye.nic.nu`hostmaster@nic.nu serial=1781830256

Same first word

back2back.no

back2back.info

back2back.nu

back2back.us

back2back.in

back2back.de

back2back.mx

back2back.ae

back2back.com

back2back.co

back2back.co.za

back2back.ca

back2back.tv

back2back.org

back2back.com.br

DNS History

11 records (6 active, 5 former)

●NSns1.simply.com2026-03-24 → 2026-06-19 · 3 obs

○ 2020-01-10 13:37:52
● 2026-03-24 10:40:22
● 2026-06-19 01:20:50

○NSns1.surf-town.net2015-12-16 → 2020-01-10 · 4 obs

● 2015-12-16 21:49:06
● 2020-01-10 13:37:52
○ 2026-03-24 10:40:22
○ 2026-06-19 01:20:50

●NSns2.simply.com2026-03-24 → 2026-06-19 · 3 obs

○ 2020-01-10 13:37:52
● 2026-03-24 10:40:22
● 2026-06-19 01:20:50

○NSns2.surf-town.net2015-12-16 → 2020-01-10 · 4 obs

● 2015-12-16 21:49:06
● 2020-01-10 13:37:52
○ 2026-03-24 10:40:22
○ 2026-06-19 01:20:50

●NSns3.simply.com2026-03-24 → 2026-06-19 · 3 obs

○ 2020-01-10 13:37:52
● 2026-03-24 10:40:22
● 2026-06-19 01:20:50

○NSns3.surf-town.net2015-12-16 → 2020-01-10 · 4 obs

● 2015-12-16 21:49:06
● 2020-01-10 13:37:52
○ 2026-03-24 10:40:22
○ 2026-06-19 01:20:50

●NSns4.simply.com2026-03-24 → 2026-06-19 · 3 obs

○ 2020-01-10 13:37:52
● 2026-03-24 10:40:22
● 2026-06-19 01:20:50

○MXmail21.surftown.se2015-12-16 → 2020-01-10 · 4 obs

● 2015-12-16 21:49:06
● 2020-01-10 13:37:52
○ 2026-03-24 10:40:22
○ 2026-06-19 01:20:50

●MXmx.simply.com2026-03-24 → 2026-06-19 · 3 obs

○ 2020-01-10 13:37:52
● 2026-03-24 10:40:22
● 2026-06-19 01:20:50

●A185.20.205.692026-03-24 → 2026-06-19 · 3 obs

○ 2020-01-10 13:37:52
● 2026-03-24 10:40:22
● 2026-06-19 01:20:50

○A212.97.132.1722015-12-16 → 2020-01-10 · 4 obs

● 2015-12-16 21:49:06
● 2020-01-10 13:37:52
○ 2026-03-24 10:40:22
○ 2026-06-19 01:20:50

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
nu	a.ns.nu, c.ns.nu, d.ns.nu, m.ns.nu...	12 records
back2back.nu	ns1.simply.com, ns2.simply.com, ns3.simply.com, ns4.simply.com	-

✅ Authoritative Response

Server:91.197.248.78

NS records: ns1.simply.com, ns2.simply.com, ns3.simply.com, ns4.simply.com

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 1578ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`185.20.205.69`
NS	4	`ns4.simply.com, ns2.simply.com...`
MX	1	`mx.simply.com (pri: 10)`
TXT	1	`v=spf1 include:spf.simply.com -all`
SOA	1	`ns1.simply.com hostmaster.simply.com`

📌 Glue Records Collected

Total: 12

In-bailiwick: 12 (a.ns.nu, a.ns.nu, c.ns.nu...)

Analysis

IP Addresses

back2back.nu directs to one IP number, which is 185.20.205.69.

Among the host names that share IP numbers with back2back.nu are langegard.se, www.fryksdalen.se, rorjour.se and two others.

Name Servers

The domain back2back.nu is delegated to these four name servers: ns1.simply.com, ns2.simply.com, ns3.simply.com and ns4.simply.com.

back2back.nu has at least partial name server overlap with other domains, such as isar.dk, bestofmacedonia.com, emy.dk and two others.

It is common to find these name servers paired with the name servers ns1.unoeuro.com, ns2.unoeuro.com, ns3.unoeuro.com and ns4.unoeuro.com.

Hosts with two IP numbers each:

ns1.simply.com resolves to two addresses: 91.197.248.78 and 2a02:2339:1:15c::4562:4562.

ns2.simply.com resolves to two addresses: 185.25.141.15 and 2a02:2339:4006:101::4562:4562.

Hosts that resolve to one IP address:

The hostname ns3.simply.com resolves to 91.197.248.79.

The hostname ns4.simply.com resolves to 91.197.248.80.

Mail Servers

back2back.nu routes its mail through a single mail server, mx.simply.com.

back2back.nu has the same mail server arrangement as a number of other domains, for example gbar.dk, jrr.dk, dalsbaek.dk and two more.

The mail servers of back2back.nu are at least partially shared with other domains, including personalfit.dk.

mx.simply.com carries a single IP number, which is 94.231.106.20.