courseforjob.net - robtex.com

courseforjob.net

DNSSEC⚠️ Not signed
A2606:4700:3030::ac43:c03f🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3031::6815:33f4🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.51.244Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.192.63🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSjillian.ns.cloudflare.com ⭐
A2606:4700:50::a29f:262c🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRjillian.ns.cloudflare.com
A2803:f800:50::6ca2:c22c🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRjillian.ns.cloudflare.com
A2a06:98c1:50::ac40:222c🇺🇸 Cloudflare2a06:98c1:50::/45
PTRjillian.ns.cloudflare.com
A108.162.194.44🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRjillian.ns.cloudflare.com
A162.159.38.44Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRjillian.ns.cloudflare.com
A172.64.34.44🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRjillian.ns.cloudflare.com
NSnorman.ns.cloudflare.com
A2606:4700:58::adf5:3bd9🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRnorman.ns.cloudflare.com
A2803:f800:50::6ca2:c1d9🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRnorman.ns.cloudflare.com
A2a06:98c1:50::ac40:21d9🇺🇸 Cloudflare2a06:98c1:50::/45
PTRnorman.ns.cloudflare.com
A108.162.193.217🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRnorman.ns.cloudflare.com
A172.64.33.217🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRnorman.ns.cloudflare.com
A173.245.59.217🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRnorman.ns.cloudflare.com
MXmx1.larksuite.com ⭐
A18.139.153.173🇸🇬 Amazon18.138.0.0/15 EC2 SIN prefix
PTRec2-18-139-153-173.ap-southeast-1.compute.amazonaws.com
MXmx2.larksuite.com(5)
A18.139.153.173🇸🇬 Amazon18.138.0.0/15 EC2 SIN prefix
PTRec2-18-139-153-173.ap-southeast-1.compute.amazonaws.com
MXmx3.larksuite.com(10)
A18.139.153.173🇸🇬 Amazon18.138.0.0/15 EC2 SIN prefix
PTRec2-18-139-153-173.ap-southeast-1.compute.amazonaws.com
A101.126.58.223🇨🇳 VOLCANO-ENGINE101.126.56.0/21 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,
A122.14.230.154🇨🇳 CHINAMOBILE-CN122.14.224.0/20
TXTv=spf1 a mx include:spf.postal.techio.dev +include:spf.onlarksuite.com -all
TXTverification-code-site-App_lark=CqUrKSZNGlKarDlsMcrs
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.51.244, 172.67.192.63
IPv6 hints2606:4700:3030::ac43:c03f, 2606:4700:3031::6815:33f4
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=238, name=cloudflare-ech.com
SOAjillian.ns.cloudflare.comdns@cloudflare.com serial=2400544332

net

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=1776011127

Same first word

courseforjob.net

DNS History

9 records (9 active, 0 former)

NSjillian.ns.cloudflare.comnorman.ns.cloudflare.comMXmx1.larksuite.commx2.larksuite.commx3.larksuite.comA104.21.51.244172.67.192.632606:4700:3030::ac43:c03f2606:4700:3031::6815:33f4
●NSjillian.ns.cloudflare.com2026-03-29 → 2026-04-12 · 2 obs
● 2026-03-29 22:47:00
● 2026-04-12 16:46:20
●NSnorman.ns.cloudflare.com2026-03-29 → 2026-04-12 · 2 obs
● 2026-03-29 22:47:00
● 2026-04-12 16:46:20
●MXmx1.larksuite.com2026-03-29 → 2026-04-12 · 2 obs
● 2026-03-29 22:47:00
● 2026-04-12 16:46:20
●MXmx2.larksuite.com2026-03-29 → 2026-04-12 · 2 obs
● 2026-03-29 22:47:00
● 2026-04-12 16:46:20
●MXmx3.larksuite.com2026-03-29 → 2026-04-12 · 2 obs
● 2026-03-29 22:47:00
● 2026-04-12 16:46:20
●A104.21.51.2442026-03-29 → 2026-04-12 · 2 obs
● 2026-03-29 22:47:00
● 2026-04-12 16:46:20
●A172.67.192.632026-03-29 → 2026-04-12 · 2 obs
● 2026-03-29 22:47:00
● 2026-04-12 16:46:20
●A2606:4700:3030::ac43:c03f2026-03-29 → 2026-04-12 · 2 obs
● 2026-03-29 22:47:00
● 2026-04-12 16:46:20
●A2606:4700:3031::6815:33f42026-03-29 → 2026-04-12 · 2 obs
● 2026-03-29 22:47:00
● 2026-04-12 16:46:20

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
netb.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net, e.gtld-servers.net...-
courseforjob.netnorman.ns.cloudflare.com, jillian.ns.cloudflare.com-

✅ Authoritative Response

Server:172.64.34.44

NS records: norman.ns.cloudflare.com, jillian.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for courseforjob.net (unsigned zone)

⏱️ Timing

Total: 593ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.192.63, 104.21.51.244
AAAA22606:4700:3030::ac43:c03f, 2606:4700:3031::6815:33f4
NS2jillian.ns.cloudflare.com, norman.ns.cloudflare.com
MX3mx1.larksuite.com (pri: 1), mx3.larksuite.com (pri: 10)...
TXT2v=spf1 a mx include:spf.postal.techio.de, verification-code-site-App_lark=CqUrKSZN
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1jillian.ns.cloudflare.com dns.cloudflare

Analysis

IP Addresses

courseforjob.net points to four IP numbers: 2606:4700:3030::ac43:c03f, 2606:4700:3031::6815:33f4, 104.21.51.244 and 172.67.192.63.

Other host names, for instance www.howapi.co.kr, redbtn.info, 2530.com.cn, www.lajytnrioiaqy.website and etahockey.com share IP numbers with courseforjob.net.

Name Servers

courseforjob.net is delegated to two name servers: jillian.ns.cloudflare.com and norman.ns.cloudflare.com.

courseforjob.net uses the same name server setup as other domains, for instance egzekucj(0x616e616c)eznosci.pl, weselneauta.pl, nastudia.pl, missnudity.com and tatworld.ru.

courseforjob.net shares name servers with other domains at least partially, for instance formotion.is, hkim.jp, xenolumadara.com, smart-group.biz and mz-plinko.com.

These name servers are often used with gabriel.ns.cloudflare.com, alexa.ns.cloudflare.com, santino.ns.cloudflare.com, eloise.ns.cloudflare.com and tadeo.ns.cloudflare.com.

Host names with six IP numbers: jillian.ns.cloudflare.com points to 2606:4700:50::a29f:262c, 2803:f800:50::6ca2:c22c, 2a06:98c1:50::ac40:222c, 108.162.194.44, 162.159.38.44 and 172.64.34.44; norman.ns.cloudflare.com points to 2606:4700:58::adf5:3bd9, 2803:f800:50::6ca2:c1d9, 2a06:98c1:50::ac40:21d9, 108.162.193.217, 172.64.33.217 and 173.245.59.217.

Mail Servers

courseforjob.net is handled by three mail servers: mx1.larksuite.com, mx2.larksuite.com and mx3.larksuite.com.

courseforjob.net shares some mail servers with other domains, including eggdemy.com, 0vm.com, cnsdj.com, binggroup.com and nekofight.com.

Host names with three IP numbers:

Host name mx3.larksuite.com points to: 18.139.153.173, 101.126.58.223 and 122.14.230.154.

Host names with one IP number:

mx1.larksuite.com and mx2.larksuite.com point to 18.139.153.173.

Host names that point to 18.139.153.173 are mx3.larksuite.com, mx1.larksuite.com and mx2.larksuite.com.