51sfc.com - robtex.com

51sfc.com

DNSSEC⚠️ Not signed
A2606:4700:3030::ac43:ab67🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3032::6815:1d30🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.29.48Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.171.103🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSaddyson.ns.cloudflare.com ⭐
A2606:4700:50::a29f:2644🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRaddyson.ns.cloudflare.com
A2803:f800:50::6ca2:c244🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRaddyson.ns.cloudflare.com
A2a06:98c1:50::ac40:2244🇺🇸 Cloudflare2a06:98c1:50::/45
PTRaddyson.ns.cloudflare.com
A108.162.194.68🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRaddyson.ns.cloudflare.com
A162.159.38.68Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRaddyson.ns.cloudflare.com
A172.64.34.68🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRaddyson.ns.cloudflare.com
NSosmar.ns.cloudflare.com
A2606:4700:58::a29f:2c7c🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRosmar.ns.cloudflare.com
A2803:f800:50::6ca2:c37c🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRosmar.ns.cloudflare.com
A2a06:98c1:50::ac40:237c🇺🇸 Cloudflare2a06:98c1:50::/45
PTRosmar.ns.cloudflare.com
A108.162.195.124🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRosmar.ns.cloudflare.com
A162.159.44.124Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRosmar.ns.cloudflare.com
A172.64.35.124🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRosmar.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4104.21.29.48, 172.67.171.103
IPv62606:4700:3030::ac43:ab67, 2606:4700:3032::6815:1d30
SOAaddyson.ns.cloudflare.comdns@cloudflare.com serial=2395932915

com

DNSSEC🔒 Signed (DS record present)
NSa.gtld-servers.net ⭐
NSb.gtld-servers.net
NSc.gtld-servers.net
NSd.gtld-servers.net
NSe.gtld-servers.net
NSf.gtld-servers.net
NSg.gtld-servers.net
NSh.gtld-servers.net
NSi.gtld-servers.net
NSj.gtld-servers.net
NSk.gtld-servers.net
NSl.gtld-servers.net
NSm.gtld-servers.net
SOAa.gtld-servers.netnstld@verisign-grs.com serial=1774646002

Same first word

51sfc.com

Similar names

51fcs.cn

DNS History

13 records (6 active, 7 former)

20162017201820192020202120222023202420252026NSaddyson.ns.cloudflare.comosmar.ns.cloudflare.comns251.ndns.cnns252.ndns.cnA104.21.29.48172.67.171.1032606:4700:3030::ac43:ab672606:4700:3032::6815:1d30174.139.50.60188.114.96.0188.114.97.02a06:98c1:3120::2a06:98c1:3121::
●NSaddyson.ns.cloudflare.com2026-02-27 → 2026-03-27 · 3 obs
○ 2017-03-22 06:29:28
● 2026-02-27 21:23:08
● 2026-03-27 21:23:02
○NSns251.ndns.cn2015-06-07 → 2017-03-22 · 4 obs
● 2015-06-07 13:27:52
● 2017-03-22 06:29:28
○ 2026-02-27 21:23:08
○ 2026-03-27 21:23:02
○NSns252.ndns.cn2015-06-07 → 2017-03-22 · 4 obs
● 2015-06-07 13:27:52
● 2017-03-22 06:29:28
○ 2026-02-27 21:23:08
○ 2026-03-27 21:23:02
●NSosmar.ns.cloudflare.com2026-02-27 → 2026-03-27 · 3 obs
○ 2017-03-22 06:29:28
● 2026-02-27 21:23:08
● 2026-03-27 21:23:02
●A104.21.29.482026-02-27 → 2026-03-27 · 5 obs
○ 2017-03-22 06:29:28
● 2026-02-27 21:23:08
● 2026-02-27 23:05:02
○ 2026-03-06 12:58:24
● 2026-03-27 21:23:02
●A172.67.171.1032026-02-27 → 2026-03-27 · 5 obs
○ 2017-03-22 06:29:28
● 2026-02-27 21:23:08
● 2026-02-27 23:05:02
○ 2026-03-06 12:58:24
● 2026-03-27 21:23:02
○A174.139.50.602015-06-07 → 2017-03-22 · 4 obs
● 2015-06-07 13:27:52
● 2017-03-22 06:29:28
○ 2026-02-27 21:23:08
○ 2026-03-27 21:23:02
○A188.114.96.02026-03-06 → 2026-03-06 · 3 obs
○ 2026-02-27 23:05:02
● 2026-03-06 12:58:24
○ 2026-03-27 21:23:02
○A188.114.97.02026-03-06 → 2026-03-06 · 3 obs
○ 2026-02-27 23:05:02
● 2026-03-06 12:58:24
○ 2026-03-27 21:23:02
●A2606:4700:3030::ac43:ab672026-02-27 → 2026-03-27 · 5 obs
○ 2017-03-22 06:29:28
● 2026-02-27 21:23:08
● 2026-02-27 23:05:02
○ 2026-03-06 12:58:24
● 2026-03-27 21:23:02
●A2606:4700:3032::6815:1d302026-02-27 → 2026-03-27 · 5 obs
○ 2017-03-22 06:29:28
● 2026-02-27 21:23:08
● 2026-02-27 23:05:02
○ 2026-03-06 12:58:24
● 2026-03-27 21:23:02
○A2a06:98c1:3120::2026-03-06 → 2026-03-06 · 3 obs
○ 2026-02-27 23:05:02
● 2026-03-06 12:58:24
○ 2026-03-27 21:23:02
○A2a06:98c1:3121::2026-03-06 → 2026-03-06 · 3 obs
○ 2026-02-27 23:05:02
● 2026-03-06 12:58:24
○ 2026-03-27 21:23:02

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coma.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...-
51sfc.comaddyson.ns.cloudflare.com, osmar.ns.cloudflare.com12 records

✅ Authoritative Response

Server:108.162.195.124

NS records: addyson.ns.cloudflare.com, osmar.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 51sfc.com (unsigned zone)

⏱️ Timing

Total: 97ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.171.103, 104.21.29.48
AAAA22606:4700:3032::6815:1d30, 2606:4700:3030::ac43:ab67
NS2addyson.ns.cloudflare.com, osmar.ns.cloudflare.com
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1addyson.ns.cloudflare.com dns.cloudflare

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (addyson.ns.cloudflare.com, addyson.ns.cloudflare.com, addyson.ns.cloudflare.com...)

Analysis

IP Addresses

Four IP numbers are pointed to by 51sfc.com: 2606:4700:3030::ac43:ab67, 2606:4700:3032::6815:1d30, 104.21.29.48 and 172.67.171.103.

other host names including karyaendustri.com.tr, al-kafaah.com, 1win-fgh5.top, galahadmgmt.com and comedu.net share IP numbers with 51sfc.com.

Name Servers

51sfc.com is delegated to two name servers addyson.ns.cloudflare.com and osmar.ns.cloudflare.com.

51sfc.com shares the same name server setup as other domains, for instance ritaow.com, sanhetest.com, hizenx.com, new-now.com and a8cms.com.

51sfc.com at least partially shares name servers with other domains, for instance mks888.net, 1wufjt.life, 1wafik.life, 1wsinu.life and cdnmail.net.

These name servers are commonly used alongside leia.ns.cloudflare.com and merlin.ns.cloudflare.com.

Host names with six IP numbers:

Host name addyson.ns.cloudflare.com points to: 2606:4700:50::a29f:2644, 2803:f800:50::6ca2:c244, 2a06:98c1:50::ac40:2244, 108.162.194.68, 162.159.38.68 and 172.64.34.68.

Host name osmar.ns.cloudflare.com points to: 2606:4700:58::a29f:2c7c, 2803:f800:50::6ca2:c37c, 2a06:98c1:50::ac40:237c, 108.162.195.124, 162.159.44.124 and 172.64.35.124.