`onecoursesource.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3031::6815:573^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3034::ac43:855e^{🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.5.115^{Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.133.94^{🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`sam.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b8d^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sam.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c18d^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`sam.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:218d^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`sam.ns.cloudflare.com`
		A	108.162.193.141^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sam.ns.cloudflare.com`
		A	172.64.33.141^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sam.ns.cloudflare.com`
		A	173.245.59.141^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sam.ns.cloudflare.com`
NS	`sandy.ns.cloudflare.com`
		A	2606:4700:50::adf5:3adb^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sandy.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0db^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`sandy.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20db^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`sandy.ns.cloudflare.com`
		A	108.162.192.219^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sandy.ns.cloudflare.com`
		A	172.64.32.219^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sandy.ns.cloudflare.com`
		A	173.245.58.219^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sandy.ns.cloudflare.com`
MX	`mail.onecoursesource.com` ⭐
		A	38.89.139.86^{🇺🇸 AS1388638.89.139.0/24}
			PTR	`www.onecoursesource.com`
TXT	`v=spf1 ip4:38.89.139.86 -all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4	104.21.5.115, 172.67.133.94
		IPv6	2606:4700:3031::6815:573, 2606:4700:3034::ac43:855e
SOA	`sam.ns.cloudflare.com`dns@cloudflare.com serial=2394008554

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1771291435

WOT: SAFE (63/100)

DNS History

10 records (7 active, 3 former)

●NSsam.ns.cloudflare.com2026-02-25 → 2026-02-25 · 3 obs

○ 2020-02-19 22:50:36
● 2026-02-25 19:09:46
● 2026-02-25 19:09:48

●NSsandy.ns.cloudflare.com2026-02-25 → 2026-02-25 · 3 obs

○ 2020-02-19 22:50:36
● 2026-02-25 19:09:46
● 2026-02-25 19:09:48

○NSttr.technicaltrainingresources.com2015-07-09 → 2020-02-19 · 5 obs

○ 2008-03-19 02:11:02
● 2015-07-09 04:07:42
● 2020-02-19 22:50:36
○ 2026-02-25 19:09:46
○ 2026-02-25 19:09:48

●MXmail.onecoursesource.com2008-03-19 → 2026-02-25 · 2 obs

● 2008-03-19 02:11:02
● 2026-02-25 19:09:48

●A104.21.5.1152026-02-25 → 2026-02-25 · 3 obs

○ 2020-02-19 22:50:36
● 2026-02-25 19:09:46
● 2026-02-25 19:09:48

●A172.67.133.942026-02-25 → 2026-02-25 · 3 obs

○ 2020-02-19 22:50:36
● 2026-02-25 19:09:46
● 2026-02-25 19:09:48

●A2606:4700:3031::6815:5732026-02-25 → 2026-02-25 · 3 obs

○ 2020-02-19 22:50:36
● 2026-02-25 19:09:46
● 2026-02-25 19:09:48

●A2606:4700:3034::ac43:855e2026-02-25 → 2026-02-25 · 3 obs

○ 2020-02-19 22:50:36
● 2026-02-25 19:09:46
● 2026-02-25 19:09:48

○A38.89.136.1092015-07-09 → 2020-02-19 · 5 obs

○ 2008-03-19 02:11:02
● 2015-07-09 04:07:42
● 2020-02-19 22:50:36
○ 2026-02-25 19:09:46
○ 2026-02-25 19:09:48

○A66.113.130.1792008-03-19 → 2008-03-19 · 3 obs

● 2008-03-19 02:11:02
○ 2015-07-09 04:07:42
○ 2026-02-25 19:09:48

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
onecoursesource.com	sam.ns.cloudflare.com, sandy.ns.cloudflare.com	-

✅ Authoritative Response

Server: 108.162.192.219

NS records: sam.ns.cloudflare.com, sandy.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for onecoursesource.com (unsigned zone)

⏱️ Timing

Total: 221ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.5.115, 172.67.133.94`
AAAA	2	`2606:4700:3034::ac43:855e, 2606:4700:3031::6815:573`
NS	2	`sam.ns.cloudflare.com, sandy.ns.cloudflare.com`
MX	1	`mail.onecoursesource.com (pri: 0)`
TXT	1	`v=spf1 ip4:38.89.139.86 -all`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`sam.ns.cloudflare.com dns.cloudflare.com`

AI analysis

onecoursesource.com points to four IP numbers: 2606:4700:3031::6815:573, 2606:4700:3034::ac43:855e, 104.21.5.115 and 172.67.133.94.

For instance, other host names ds-kids.com, www.airliquide-expertisecenter.com, mkbtc.cn, www.oodle.software and gravitybender.com.cdn.cloudflare.net share IP numbers with onecoursesource.com.

onecoursesource.com is delegated to two name servers: sam.ns.cloudflare.com and sandy.ns.cloudflare.com.

onecoursesource.com uses the same name server setup as other domains such as epostprocessor.com, loadstatsfast.com, vjvnow.com, river949.com and balarweaves.com.

onecoursesource.com shares name servers with other domains at least partially, for example chemcentrum.nl, millermedia.nl, penables.com, zjwzhl.com and notguiltybyyaani.com.

These name servers are commonly used with the name servers jerry.ns.cloudflare.com and noel.ns.cloudflare.com.

Host names with six IP numbers: host name sam.ns.cloudflare.com points to: 2606:4700:58::adf5:3b8d, 2803:f800:50::6ca2:c18d, 2a06:98c1:50::ac40:218d, 108.162.193.141, 172.64.33.141 and 173.245.59.141; host name sandy.ns.cloudflare.com points to: 2606:4700:50::adf5:3adb, 2803:f800:50::6ca2:c0db, 2a06:98c1:50::ac40:20db, 108.162.192.219, 172.64.32.219 and 173.245.58.219.

onecoursesource.com is handled by a single mail server, mail.onecoursesource.com.

mail.onecoursesource.com points to a single IP: 38.89.139.86.

onecoursesource.com - robtex.com