f-class.org - robtex.com

f-class.org

DNSSEC⚠️ Not signed
A2606:4700:3035::6815:522d🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3036::ac43:9967🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.82.45Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.153.103🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSaragorn.ns.cloudflare.com ⭐
A2606:4700:58::adf5:3b43🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRaragorn.ns.cloudflare.com
A2803:f800:50::6ca2:c143🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRaragorn.ns.cloudflare.com
A2a06:98c1:50::ac40:2143🇺🇸 Cloudflare2a06:98c1:50::/45
PTRaragorn.ns.cloudflare.com
A108.162.193.67🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRaragorn.ns.cloudflare.com
A172.64.33.67🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRaragorn.ns.cloudflare.com
A173.245.59.67🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRaragorn.ns.cloudflare.com
NScruz.ns.cloudflare.com
A2606:4700:50::adf5:3a58🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRcruz.ns.cloudflare.com
A2803:f800:50::6ca2:c058🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRcruz.ns.cloudflare.com
A2a06:98c1:50::ac40:2058🇺🇸 Cloudflare2a06:98c1:50::/45
PTRcruz.ns.cloudflare.com
A108.162.192.88🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRcruz.ns.cloudflare.com
A172.64.32.88🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRcruz.ns.cloudflare.com
A173.245.58.88🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRcruz.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4104.21.82.45, 172.67.153.103
IPv62606:4700:3035::6815:522d, 2606:4700:3036::ac43:9967
SOAaragorn.ns.cloudflare.comdns@cloudflare.com serial=2398681534

org

DNSSEC🔒 Signed (DS record present)
NSa0.org.afilias-nst.info ⭐ ⚠️ Not in parent delegation
NSa2.org.afilias-nst.info ⚠️ Not in parent delegation
NSb0.org.afilias-nst.org
NSb2.org.afilias-nst.org
NSc0.org.afilias-nst.info ⚠️ Not in parent delegation
NSd0.org.afilias-nst.org
SOAa0.org.afilias-nst.infohostmaster@donuts.email serial=1774518899
rank #228062 globally
rank #16354 in the tld
📈 Tranco rank: #881,063

Same first word

f-class.org

DNS History

11 records (6 active, 5 former)

NSaragorn.ns.cloudflare.comcruz.ns.cloudflare.comdns1.storm-pro.netdns2.storm-pro.netdns3.storm-pro.netdns4.storm-pro.netA104.21.82.45172.67.153.1032606:4700:3035::6815:522d2606:4700:3036::ac43:99675.252.32.35
●NSaragorn.ns.cloudflare.com2026-03-18 → 2026-03-26 · 2 obs
● 2026-03-18 01:10:12
● 2026-03-26 10:30:46
●NScruz.ns.cloudflare.com2026-03-18 → 2026-03-26 · 2 obs
● 2026-03-18 01:10:12
● 2026-03-26 10:30:46
○NSdns1.storm-pro.net2026-03-18 → 2026-03-26 · 2 obs
○ 2026-03-18 01:10:12
○ 2026-03-26 10:30:46
○NSdns2.storm-pro.net2026-03-18 → 2026-03-26 · 2 obs
○ 2026-03-18 01:10:12
○ 2026-03-26 10:30:46
○NSdns3.storm-pro.net2026-03-18 → 2026-03-26 · 2 obs
○ 2026-03-18 01:10:12
○ 2026-03-26 10:30:46
○NSdns4.storm-pro.net2026-03-18 → 2026-03-26 · 2 obs
○ 2026-03-18 01:10:12
○ 2026-03-26 10:30:46
●A104.21.82.452026-03-18 → 2026-03-26 · 2 obs
● 2026-03-18 01:10:12
● 2026-03-26 10:30:46
●A172.67.153.1032026-03-18 → 2026-03-26 · 2 obs
● 2026-03-18 01:10:12
● 2026-03-26 10:30:46
●A2606:4700:3035::6815:522d2026-03-18 → 2026-03-26 · 2 obs
● 2026-03-18 01:10:12
● 2026-03-26 10:30:46
●A2606:4700:3036::ac43:99672026-03-18 → 2026-03-26 · 2 obs
● 2026-03-18 01:10:12
● 2026-03-26 10:30:46
○A5.252.32.352026-03-18 → 2026-03-26 · 2 obs
○ 2026-03-18 01:10:12
○ 2026-03-26 10:30:46

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
orgb0.org.afilias-nst.org, b2.org.afilias-nst.org, d0.org.afilias-nst.org-
f-class.orgcruz.ns.cloudflare.com, aragorn.ns.cloudflare.com-

✅ Authoritative Response

Server:173.245.58.88

NS records: cruz.ns.cloudflare.com, aragorn.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for f-class.org (unsigned zone)

⏱️ Timing

Total: 377ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.82.45, 172.67.153.103
AAAA22606:4700:3035::6815:522d, 2606:4700:3036::ac43:9967
NS2aragorn.ns.cloudflare.com, cruz.ns.cloudflare.com
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1aragorn.ns.cloudflare.com dns.cloudflare

Analysis

IP Addresses

Four IP numbers are pointed to by f-class.org: 2606:4700:3035::6815:522d, 2606:4700:3036::ac43:9967, 104.21.82.45 and 172.67.153.103.

other host names including nanfangrencai.com, cartoon(0x706f726e).pics, (0x736578)shop-cupido.com, zongpeng.com.cn and aktualnosci.co.pl share IP numbers with f-class.org.

Name Servers

f-class.org is delegated to two name servers aragorn.ns.cloudflare.com and cruz.ns.cloudflare.com.

f-class.org shares the same name server setup as other domains, for instance cls.az, triatlonwedstrijden.be, pulsosetii.ru, mynamaz.ru and ullesportiu-2.cfd.

f-class.org at least partially shares name servers with other domains, for instance theseedproject.co.nz, hardees.mobi, cartcan.com, cakawauqy.com and gb298.com.

These name servers are commonly used with fatima.ns.cloudflare.com, uma.ns.cloudflare.com and damian.ns.cloudflare.com.

Host names with six IP numbers:

Host name aragorn.ns.cloudflare.com points to: 2606:4700:58::adf5:3b43, 2803:f800:50::6ca2:c143, 2a06:98c1:50::ac40:2143, 108.162.193.67, 172.64.33.67 and 173.245.59.67.

Host name cruz.ns.cloudflare.com points to: 2606:4700:50::adf5:3a58, 2803:f800:50::6ca2:c058, 2a06:98c1:50::ac40:2058, 108.162.192.88, 172.64.32.88 and 173.245.58.88.