`f.lu`

DNSSEC	⚠️ Not signed
A	2606:4700:3034::6815:1ee7^{🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::ac43:adf7^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.30.231^{Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.173.247^{🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`jen.ns.cloudflare.com` ⭐
		A	2606:4700:50::a29f:26b9^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jen.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c2b9^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`jen.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:22b9^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`jen.ns.cloudflare.com`
		A	108.162.194.185^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jen.ns.cloudflare.com`
		A	162.159.38.185^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jen.ns.cloudflare.com`
		A	172.64.34.185^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jen.ns.cloudflare.com`
NS	`jimmy.ns.cloudflare.com`
		A	2606:4700:58::a29f:2c4c^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jimmy.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c34c^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`jimmy.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:234c^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`jimmy.ns.cloudflare.com`
		A	108.162.195.76^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jimmy.ns.cloudflare.com`
		A	162.159.44.76^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jimmy.ns.cloudflare.com`
		A	172.64.35.76^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jimmy.ns.cloudflare.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.30.231, 172.67.173.247
		IPv6 hints	2606:4700:3034::6815:1ee7, 2606:4700:3035::ac43:adf7
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=194, name=cloudflare-ech.com
SOA	`jen.ns.cloudflare.com`dns@cloudflare.com serial=2401301567

`lu`

	DNSSEC	🔒 Signed (DS record present)
	NS	`ns1.dns.lu` ⭐
	NS	`g.dns.lu`
	NS	`i.dns.lu`
	NS	`j.dns.lu`
	NS	`k.dns.lu`
	NS	`p.dns.lu`
	TXT	`Exported: 2026-05-09 15:01:01`
	SOA	`ns1.dns.lu`noc@restena.lu serial=1778331673

Same first word

f.ph

f.co.nz

f.company

f.org

f.gov.au

f.co

f.im

f.io

f.dog

f.gold

f.energy

f.plus

f.vision

f.biz

f.cheap

f.fj.cn

f.st

f.sc.cn

f.mw

f.ua

f.cm

f.sn.cn

f.elementor.cloud

f.ltd

f.wtf

f.gs.cn

f.freetls.fastly.net

f.cn

f.bank

f.fm

f.tv

f.fr

f.hr

f.akamaiedge-staging.net

f.bio

f.de

f.hu

f.tt

f.srl

f.tm

f.technology

f.is

f.com.pl

f.dating

f.ms

f.tl

f.nz

f.x0.to

f.cl

f.ps

f.sh.cn

f.nu

f.net.cn

f.to

f.edgesuite.net

f.co.uk

f.akamaiedge.net

f.fyi

f.cz

f.fi

f.cool

f.gd

f.cx

f.bi

f.kg

f.ai

f.gripe

f.run

f.net.pl

f.cc

f.gg

f.ag

f.lu

f.kiev.ua

f.team

f.sh

f.at

f.nx.cn

f.edu.pl

f.pl

f.akamai.net

f.gl

f.vg

f.hk.cn

f.mr

f.kz

f.xj.cn

f.box

f.dk

f.cg

f.zj.cn

f.co.za

f.recipes

f.inc

f.am

f.ht

f.tj.cn

f.ac

f.com.ua

f.pn

DNS History

8 records (6 active, 2 former)

●NSjen.ns.cloudflare.com2026-02-15 → 2026-05-09 · 2 obs

● 2026-02-15 18:11:24
● 2026-05-09 14:20:38

●NSjimmy.ns.cloudflare.com2026-02-15 → 2026-05-09 · 2 obs

● 2026-02-15 18:11:24
● 2026-05-09 14:20:38

●A104.21.30.2312026-02-15 → 2026-05-09 · 10 obs

● 2026-02-15 18:11:24
● 2026-02-21 07:55:00
○ 2026-02-26 16:24:56
○ 2026-02-28 11:02:02
● 2026-03-03 09:07:38
○ 2026-03-03 13:13:08
● 2026-03-10 07:06:32
○ 2026-03-18 01:13:44
● 2026-03-21 21:17:00
● 2026-05-09 14:20:38

○A172.64.80.12026-02-26 → 2026-03-18 · 10 obs

○ 2026-02-15 18:11:24
○ 2026-02-21 07:55:00
● 2026-02-26 16:24:56
● 2026-02-28 11:02:02
○ 2026-03-03 09:07:38
● 2026-03-03 13:13:08
○ 2026-03-10 07:06:32
● 2026-03-18 01:13:44
○ 2026-03-21 21:17:00
○ 2026-05-09 14:20:38

●A172.67.173.2472026-02-15 → 2026-05-09 · 10 obs

○A2606:4700:130:436c:6f75:6466:6c61:72652026-02-26 → 2026-03-18 · 9 obs

○ 2026-02-21 07:55:00
● 2026-02-26 16:24:56
● 2026-02-28 11:02:02
○ 2026-03-03 09:07:38
● 2026-03-03 13:13:08
○ 2026-03-10 07:06:32
● 2026-03-18 01:13:44
○ 2026-03-21 21:17:00
○ 2026-05-09 14:20:38

●A2606:4700:3034::6815:1ee72026-02-15 → 2026-05-09 · 10 obs

●A2606:4700:3035::ac43:adf72026-02-15 → 2026-05-09 · 10 obs

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
lu	p.dns.lu, j.dns.lu, g.dns.lu, ns1.dns.lu...	12 records
f.lu	jen.ns.cloudflare.com, jimmy.ns.cloudflare.com	-

✅ Authoritative Response

Server:162.159.44.76

NS records: jen.ns.cloudflare.com, jimmy.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for f.lu (unsigned zone)

⏱️ Timing

Total: 469ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.173.247, 104.21.30.231`
AAAA	2	`2606:4700:3035::ac43:adf7, 2606:4700:3034::6815:1ee7`
NS	2	`jen.ns.cloudflare.com, jimmy.ns.cloudflare.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`jen.ns.cloudflare.com dns.cloudflare.com`

📌 Glue Records Collected

Total: 12

In-bailiwick: 12 (p.dns.lu, p.dns.lu, j.dns.lu...)

Analysis

IP Addresses

Four IP numbers are pointed to by f.lu: 2606:4700:3034::6815:1ee7, 2606:4700:3035::ac43:adf7, 104.21.30.231 and 172.67.173.247.

other host names including primo-europe.eu, tipicadocedecupuacu.sbs, beerkong.de, kg-group.capital and yapaycicekmerkezi.com share IP numbers with f.lu.

Name Servers

f.lu is delegated to two name servers jen.ns.cloudflare.com and jimmy.ns.cloudflare.com.

f.lu shares the same name server setup as other domains, for instance ck.ly, ve.ly, loan.fm, frontierdental.com and who.fm.

f.lu at least partially shares name servers with other domains, for instance fanstar.com, ciceromagazine.com, naomiebooth.com, vsarv.com and pokobo.com.

These name servers are commonly used with rayden.ns.cloudflare.com, melnicoff.ns.cloudflare.com and augustus.ns.cloudflare.com.

Host names with six IP numbers:

Host name jen.ns.cloudflare.com points to: 2606:4700:50::a29f:26b9, 2803:f800:50::6ca2:c2b9, 2a06:98c1:50::ac40:22b9, 108.162.194.185, 162.159.38.185 and 172.64.34.185.

Host name jimmy.ns.cloudflare.com points to: 2606:4700:58::a29f:2c4c, 2803:f800:50::6ca2:c34c, 2a06:98c1:50::ac40:234c, 108.162.195.76, 162.159.44.76 and 172.64.35.76.

f.lu - robtex.com

f.lu

lu