`duo2.nu`

DNSSEC	⚠️ Not signed
A	2606:4700:3034::ac43:be3a^{🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::6815:13d7^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.19.215^{Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.190.58^{🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`ada.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3a36^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ada.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c036^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`ada.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2036^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`ada.ns.cloudflare.com`
		A	108.162.192.54^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ada.ns.cloudflare.com`
		A	172.64.32.54^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ada.ns.cloudflare.com`
		A	173.245.58.54^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ada.ns.cloudflare.com`
NS	`agustin.ns.cloudflare.com`
		A	2606:4700:58::a29f:2c5a^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`agustin.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c35a^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`agustin.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:235a^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`agustin.ns.cloudflare.com`
		A	108.162.195.90^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`agustin.ns.cloudflare.com`
		A	162.159.44.90^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`agustin.ns.cloudflare.com`
		A	172.64.35.90^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`agustin.ns.cloudflare.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4	104.21.19.215, 172.67.190.58
		IPv6	2606:4700:3034::ac43:be3a, 2606:4700:3035::6815:13d7
SOA	`ada.ns.cloudflare.com`dns@cloudflare.com serial=2398579508

`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	`id:eac1eab3-c44d-47c8-a8b2-552bf3a98d7c`
	TXT	`NU zone update: 2026-03-26 07:43:13 +0000 (EPOCH 1774510993) (auto)`
	SOA	`catcher-in-the-rye.nic.nu`hostmaster@nic.nu serial=1774511096

Same first word

duo2.tv

duo2.me

duo2.com

duo2.nu

duo2.com.au

duo2.net

duo2.com.br

duo2.de

Similar names

udo2.com

2odu.com

do2u.com

dou2.ru

2dou.com.cn

2dou.com

dou2.com

u2do.com

2duo.de

2duo.com

do2u.ro

do2u.org

2duo.nl

oud2.com

DNS History

16 records (6 active, 10 former)

●NSada.ns.cloudflare.com2026-02-25 → 2026-03-26 · 3 obs

○ 2017-12-08 22:52:48
● 2026-02-25 03:21:12
● 2026-03-26 08:47:22

●NSagustin.ns.cloudflare.com2026-02-25 → 2026-03-26 · 3 obs

○ 2017-12-08 22:52:48
● 2026-02-25 03:21:12
● 2026-03-26 08:47:22

○NSdns10.activeisp.com2015-05-15 → 2015-05-15 · 3 obs

● 2015-05-15 16:48:44
○ 2015-10-19 15:39:54
○ 2026-03-26 08:47:22

○NSdns11.activeisp.com2015-05-15 → 2015-05-15 · 3 obs

● 2015-05-15 16:48:44
○ 2015-10-19 15:39:54
○ 2026-03-26 08:47:22

○NSdns12.activeisp.com2015-05-15 → 2015-05-15 · 3 obs

● 2015-05-15 16:48:44
○ 2015-10-19 15:39:54
○ 2026-03-26 08:47:22

○NSns1.loopia.se2015-10-19 → 2017-12-08 · 5 obs

○ 2015-05-15 16:48:44
● 2015-10-19 15:39:54
● 2017-12-08 22:52:48
○ 2026-02-25 03:21:12
○ 2026-03-26 08:47:22

○NSns2.loopia.se2015-10-19 → 2017-12-08 · 5 obs

○ 2015-05-15 16:48:44
● 2015-10-19 15:39:54
● 2017-12-08 22:52:48
○ 2026-02-25 03:21:12
○ 2026-03-26 08:47:22

●A104.21.19.2152026-02-25 → 2026-03-26 · 7 obs

○ 2017-12-08 22:52:48
● 2026-02-25 03:21:12
● 2026-03-16 12:36:06
○ 2026-03-16 15:57:22
○ 2026-03-17 20:16:06
● 2026-03-26 01:42:52
● 2026-03-26 08:47:22

●A172.67.190.582026-02-25 → 2026-03-26 · 7 obs

○ 2017-12-08 22:52:48
● 2026-02-25 03:21:12
● 2026-03-16 12:36:06
○ 2026-03-16 15:57:22
○ 2026-03-17 20:16:06
● 2026-03-26 01:42:52
● 2026-03-26 08:47:22

○A188.114.96.02026-03-16 → 2026-03-17 · 5 obs

○ 2026-03-16 12:36:06
● 2026-03-16 15:57:22
● 2026-03-17 20:16:06
○ 2026-03-26 01:42:52
○ 2026-03-26 08:47:22

○A188.114.97.02026-03-16 → 2026-03-17 · 5 obs

○ 2026-03-16 12:36:06
● 2026-03-16 15:57:22
● 2026-03-17 20:16:06
○ 2026-03-26 01:42:52
○ 2026-03-26 08:47:22

○A195.74.38.682015-05-15 → 2017-12-08 · 4 obs

● 2015-05-15 16:48:44
● 2017-12-08 22:52:48
○ 2026-02-25 03:21:12
○ 2026-03-26 08:47:22

●A2606:4700:3034::ac43:be3a2026-02-25 → 2026-03-26 · 7 obs

○ 2017-12-08 22:52:48
● 2026-02-25 03:21:12
● 2026-03-12 05:45:18
○ 2026-03-16 12:36:06
○ 2026-03-16 15:57:22
● 2026-03-17 20:16:06
● 2026-03-26 08:47:22

●A2606:4700:3035::6815:13d72026-02-25 → 2026-03-26 · 7 obs

○ 2017-12-08 22:52:48
● 2026-02-25 03:21:12
● 2026-03-12 05:45:18
○ 2026-03-16 12:36:06
○ 2026-03-16 15:57:22
● 2026-03-17 20:16:06
● 2026-03-26 08:47:22

○A2a06:98c1:3120::2026-03-16 → 2026-03-16 · 5 obs

○ 2026-03-12 05:45:18
● 2026-03-16 12:36:06
● 2026-03-16 15:57:22
○ 2026-03-17 20:16:06
○ 2026-03-26 08:47:22

○A2a06:98c1:3121::2026-03-16 → 2026-03-16 · 5 obs

○ 2026-03-12 05:45:18
● 2026-03-16 12:36:06
● 2026-03-16 15:57:22
○ 2026-03-17 20:16:06
○ 2026-03-26 08:47:22

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
nu	a.ns.nu, d.ns.nu, c.ns.nu, m.ns.nu...	12 records
duo2.nu	agustin.ns.cloudflare.com, ada.ns.cloudflare.com	-

✅ Authoritative Response

Server:108.162.195.90

NS records: agustin.ns.cloudflare.com, ada.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for duo2.nu (unsigned zone)

⏱️ Timing

Total: 512ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.190.58, 104.21.19.215`
AAAA	2	`2606:4700:3035::6815:13d7, 2606:4700:3034::ac43:be3a`
NS	2	`ada.ns.cloudflare.com, agustin.ns.cloudflare.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`ada.ns.cloudflare.com dns.cloudflare.com`

📌 Glue Records Collected

Total: 12

In-bailiwick: 12 (z.ns.nu, y.ns.nu, m.ns.nu...)

Analysis

IP Addresses

duo2.nu maps to four IP numbers: 2606:4700:3034::ac43:be3a, 2606:4700:3035::6815:13d7, 104.21.19.215 and 172.67.190.58.

Other host names such as www.methofix.click, (0x796f756a697a7a).bond, madurird.com, kilomart.com and pcpm39rekrutmenbi.id share IPs with duo2.nu.

Name Servers

Two name servers ada.ns.cloudflare.com and agustin.ns.cloudflare.com handle the delegation for duo2.nu.

duo2.nu shares the same name server setup as other domains, for example chalmerssolarteam.com, annawagrodzka.pl, pubilc-trezor-brid.pages.dev, e-sonrie.com and drogaratownika.pl.

duo2.nu at least partially shares name servers with other domains, for example healthywage.com, luaz.ru, pfppack.com, 00cllllzz.com and cannabt.com.

these name servers are commonly used alongside sarah.ns.cloudflare.com name servers.

Host names with six IP numbers:

ada.ns.cloudflare.com points to 2606:4700:50::adf5:3a36, 2803:f800:50::6ca2:c036, 2a06:98c1:50::ac40:2036, 108.162.192.54, 172.64.32.54 and 173.245.58.54.

agustin.ns.cloudflare.com points to 2606:4700:58::a29f:2c5a, 2803:f800:50::6ca2:c35a, 2a06:98c1:50::ac40:235a, 108.162.195.90, 162.159.44.90 and 172.64.35.90.

duo2.nu - robtex.com

duo2.nu

nu

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

IP Addresses

Name Servers

`duo2.nu`

`nu`