coreinterview.com - dns.ninja

`coreinterview.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3031::6815:5e6^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3036::ac43:85f4^{🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.5.230^{Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.133.244^{🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`jermaine.ns.cloudflare.com` ⭐
		A	2606:4700:58::a29f:2c9d^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jermaine.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c39d^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`jermaine.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:239d^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`jermaine.ns.cloudflare.com`
		A	108.162.195.157^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jermaine.ns.cloudflare.com`
		A	162.159.44.157^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jermaine.ns.cloudflare.com`
		A	172.64.35.157^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jermaine.ns.cloudflare.com`
NS	`joyce.ns.cloudflare.com`
		A	2606:4700:50::a29f:260e^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`joyce.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c20e^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`joyce.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:220e^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`joyce.ns.cloudflare.com`
		A	108.162.194.14^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`joyce.ns.cloudflare.com`
		A	162.159.38.14^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`joyce.ns.cloudflare.com`
		A	172.64.34.14^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`joyce.ns.cloudflare.com`
MX	`smtp.google.com` ⭐
		A	2607:f8b0:4004:c1d::1a^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`ww-in-f26.1e100.net`
		A	2607:f8b0:4004:c23::1a^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`yuiadrs-in-f26.1e100.net`
		A	2607:f8b0:4004:c23::1b^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`yuiadrs-in-f27.1e100.net`
		A	2607:f8b0:4004:c27::1b^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`yuiadsk-in-f27.1e100.net`
		A	142.251.167.27^{🇺🇸 Google142.251.167.0/24}
			PTR	`ww-in-f27.1e100.net`
		A	172.253.139.26^{🇺🇸 Google172.253.139.0/24}
			PTR	`yuiadsk-in-f26.1e100.net`
		A	192.178.155.26^{🇺🇸 Google192.178.155.0/24}
			PTR	`yuiadrs-in-f26.1e100.net`
		A	192.178.155.27^{🇺🇸 Google192.178.155.0/24}
			PTR	`yuiadrs-in-f27.1e100.net`
		A	192.178.218.26^{🇺🇸 Google192.178.218.0/24}
			PTR	`yuiadtq-in-f26.1e100.net`
TXT	`google-site-verification=pKVwdMSTnpqsJNLfrtjI0CTGDgv4FWRVraft81fS-Rg`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.5.230, 172.67.133.244
		IPv6 hints	2606:4700:3031::6815:5e6, 2606:4700:3036::ac43:85f4
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=228, name=cloudflare-ech.com
SOA	`jermaine.ns.cloudflare.com`dns@cloudflare.com serial=2405903303

`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=1781436960

Previously MX for

coreinterview.com

Same first word

coreinterview.com

DNS History

13 records (7 active, 6 former)

●NSjermaine.ns.cloudflare.com2026-02-21 → 2026-06-14 · 3 obs

○ 2018-01-04 16:04:34
● 2026-02-21 20:39:28
● 2026-06-14 12:00:12

●NSjoyce.ns.cloudflare.com2026-02-21 → 2026-06-14 · 3 obs

○ 2018-01-04 16:04:34
● 2026-02-21 20:39:28
● 2026-06-14 12:00:12

○NSns0.aitcom.net2015-06-12 → 2018-01-04 · 4 obs

● 2015-06-12 01:58:58
● 2018-01-04 16:04:34
○ 2026-02-21 20:39:28
○ 2026-06-14 12:00:12

○NSns1.aitcom.net2015-06-12 → 2018-01-04 · 4 obs

● 2015-06-12 01:58:58
● 2018-01-04 16:04:34
○ 2026-02-21 20:39:28
○ 2026-06-14 12:00:12

○NSns2.aitcom.net2015-06-12 → 2018-01-04 · 4 obs

● 2015-06-12 01:58:58
● 2018-01-04 16:04:34
○ 2026-02-21 20:39:28
○ 2026-06-14 12:00:12

○MXcoreinterview.com2015-06-12 → 2018-01-04 · 4 obs

● 2015-06-12 01:58:58
● 2018-01-04 16:04:34
○ 2026-02-21 20:39:28
○ 2026-06-14 12:00:12

○MXsmtp.coreinterview.com2015-06-12 → 2018-01-04 · 4 obs

● 2015-06-12 01:58:58
● 2018-01-04 16:04:34
○ 2026-02-21 20:39:28
○ 2026-06-14 12:00:12

●MXsmtp.google.com2026-02-21 → 2026-06-14 · 3 obs

○ 2018-01-04 16:04:34
● 2026-02-21 20:39:28
● 2026-06-14 12:00:12

●A104.21.5.2302026-02-21 → 2026-06-14 · 3 obs

○ 2018-01-04 16:04:34
● 2026-02-21 20:39:28
● 2026-06-14 12:00:12

●A172.67.133.2442026-02-21 → 2026-06-14 · 3 obs

○ 2018-01-04 16:04:34
● 2026-02-21 20:39:28
● 2026-06-14 12:00:12

○A216.117.151.2292015-06-12 → 2018-01-04 · 4 obs

● 2015-06-12 01:58:58
● 2018-01-04 16:04:34
○ 2026-02-21 20:39:28
○ 2026-06-14 12:00:12

●A2606:4700:3031::6815:5e62026-02-21 → 2026-06-14 · 3 obs

○ 2018-01-04 16:04:34
● 2026-02-21 20:39:28
● 2026-06-14 12:00:12

●A2606:4700:3036::ac43:85f42026-02-21 → 2026-06-14 · 3 obs

○ 2018-01-04 16:04:34
● 2026-02-21 20:39:28
● 2026-06-14 12:00:12

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
coreinterview.com	joyce.ns.cloudflare.com, jermaine.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.195.157

NS records: joyce.ns.cloudflare.com, jermaine.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for coreinterview.com (unsigned zone)

⏱️ Timing

Total: 110ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.5.230, 172.67.133.244`
AAAA	2	`2606:4700:3036::ac43:85f4, 2606:4700:3031::6815:5e6`
NS	2	`jermaine.ns.cloudflare.com, joyce.ns.cloudflare.com`
MX	1	`smtp.google.com (pri: 1)`
TXT	1	`google-site-verification=pKVwdMSTnpqsJNL`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`jermaine.ns.cloudflare.com dns.cloudflar`

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

coreinterview.com points to the four IP addresses 104.21.5.230, 172.67.133.244, 2606:4700:3031::6815:5e6 and 2606:4700:3036::ac43:85f4.

Among the host names that share IP numbers with coreinterview.com are www.portabilidad.mx, forum.realliferpg.de, www.trickery.net and two others.

Name Servers

DNS delegation for coreinterview.com points to two name servers: jermaine.ns.cloudflare.com and joyce.ns.cloudflare.com.

coreinterview.com has the same name server delegation as a number of other domains, such as culinaryexploration.eu, acelera-academy.com, conscious.fashion and two more.

The name servers of coreinterview.com overlap at least partially with those of other domains — among them 44yy(0x736578)tou.com, wb-rep.com, artwister.ru and two more.

These name servers are routinely co-deployed with the name servers dalary.ns.cloudflare.com, david.ns.cloudflare.com, gigi.ns.cloudflare.com and two others.

Host names resolving to 6 IP numbers:

jermaine.ns.cloudflare.com has IP addresses 108.162.195.157, 162.159.44.157 and 172.64.35.157, plus 3 other.

joyce.ns.cloudflare.com has IP addresses 108.162.194.14, 162.159.38.14 and 172.64.34.14, plus 3 other.

Mail Servers

coreinterview.com routes its mail through a single mail server, smtp.google.com.

coreinterview.com has the same mail server arrangement as a number of other domains, for example lillieandlee.com, importautoinc.net, zurini.it and two more.

coreinterview.com shares at least some of its mail servers with other domains — for example paulowniatimber.com.au, ezland.com.vn, narayani.org and two more.

It is common for these mail servers to co-occur with alt1.aspmx.l.google.com, alt3.aspmx.l.google.com, alt2.aspmx.l.google.com and alt4.aspmx.l.google.com as mail servers.

smtp.google.com directs to 9 IP numbers, including 142.251.167.27, 172.253.139.26 and 192.178.155.26, along with 6 other.