efficient.guru - dns.ninja

`efficient.guru`

DNSSEC	⚠️ Not signed
A	2606:4700:3034::ac43:a990^{🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::6815:1ba5^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.27.165^{Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.169.144^{🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`hazel.ns.cloudflare.com` ⭐
		A	2606:4700:50::a29f:269d^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`hazel.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c29d^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`hazel.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:229d^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`hazel.ns.cloudflare.com`
		A	108.162.194.157^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`hazel.ns.cloudflare.com`
		A	162.159.38.157^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`hazel.ns.cloudflare.com`
		A	172.64.34.157^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`hazel.ns.cloudflare.com`
NS	`karl.ns.cloudflare.com`
		A	2606:4700:58::adf5:3bbe^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`karl.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c1be^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`karl.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:21be^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`karl.ns.cloudflare.com`
		A	108.162.193.190^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`karl.ns.cloudflare.com`
		A	172.64.33.190^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`karl.ns.cloudflare.com`
		A	173.245.59.190^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`karl.ns.cloudflare.com`
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c17::1a^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`bl-in-f26.1e100.net`
		A	142.251.163.27^{🇺🇸 Google142.251.163.0/24}
			PTR	`wv-in-f27.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽⁵⁾
		A	2800:3f0:4003:c0f::1b^{🇨🇱 Google2800:3f0:4003::/48}
		A	108.177.123.27^{🇺🇸 Google108.177.123.0/24}
			PTR	`lcscld-in-f27.1e100.net`
MX	`alt2.aspmx.l.google.com`⁽⁵⁾
		A	2a00:1450:400b:c02::1a^{🇮🇪 Google2a00:1450:400b::/48}
			PTR	`dj-in-f26.1e100.net`
		A	172.253.116.26^{🇺🇸 Google172.253.116.0/24}
			PTR	`dj-in-f26.1e100.net`
MX	`alt3.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:4009:c0f::1b^{🇬🇧 Google2a00:1450:4009::/48}
			PTR	`yulhrs-in-f27.1e100.net`
		A	192.178.223.26^{🇺🇸 Google192.178.223.0/24}
			PTR	`yulhrs-in-f26.1e100.net`
MX	`alt4.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:400c:c23::1b^{🇧🇪 Google2a00:1450:400c::/48}
			PTR	`yubrupd-in-f27.1e100.net`
		A	172.253.157.26^{🇺🇸 Google172.253.0.0/16}
			PTR	`yubrupd-in-f26.1e100.net`
TXT	`google-site-verification=qEmkQaVR3Nmyq8d4VOz1aeaJ3xpm7uZFHIaxLf6mWws`
TXT	`v=spf1 include:_spf.google.com ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.27.165, 172.67.169.144
		IPv6 hints	2606:4700:3034::ac43:a990, 2606:4700:3035::6815:1ba5
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=254, name=cloudflare-ech.com
SOA	`hazel.ns.cloudflare.com`dns@cloudflare.com serial=2410243541

`guru`

	DNSSEC	🔒 Signed (DS record present)
	NS	`v0n0.nic.guru` ⭐
	NS	`v0n1.nic.guru`
	NS	`v0n2.nic.guru`
	NS	`v0n3.nic.guru`
	NS	`v2n0.nic.guru`
	NS	`v2n1.nic.guru`
	SOA	`v0n0.nic.guru`hostmaster@donuts.email serial=1785608132

⚠️ On DNS blocklist: spam-tlds

Same first word

Similar names

efficeint.com

DNS History

21 records (11 active, 10 former)

●NShazel.ns.cloudflare.com2026-03-01 → 2026-08-01 · 3 obs

○ 2016-12-25 12:17:38
● 2026-03-01 18:35:28
● 2026-08-01 18:41:28

●NSkarl.ns.cloudflare.com2026-03-01 → 2026-08-01 · 3 obs

○ 2016-12-25 12:17:38
● 2026-03-01 18:35:28
● 2026-08-01 18:41:28

○NSns-us.1and1-dns.com2016-12-10 → 2016-12-25 · 4 obs

● 2016-12-10 23:50:10
● 2016-12-25 12:17:38
○ 2026-03-01 18:35:28
○ 2026-08-01 18:41:28

○NSns-us.1and1-dns.de2016-12-10 → 2016-12-25 · 4 obs

● 2016-12-10 23:50:10
● 2016-12-25 12:17:38
○ 2026-03-01 18:35:28
○ 2026-08-01 18:41:28

○NSns-us.1and1-dns.org2016-12-10 → 2016-12-25 · 4 obs

● 2016-12-10 23:50:10
● 2016-12-25 12:17:38
○ 2026-03-01 18:35:28
○ 2026-08-01 18:41:28

○NSns-us.1and1-dns.us2016-12-10 → 2016-12-25 · 4 obs

● 2016-12-10 23:50:10
● 2016-12-25 12:17:38
○ 2026-03-01 18:35:28
○ 2026-08-01 18:41:28

●MXalt1.aspmx.l.google.com2026-03-01 → 2026-08-01 · 3 obs

○ 2016-12-25 12:17:38
● 2026-03-01 18:35:28
● 2026-08-01 18:41:28

●MXalt2.aspmx.l.google.com2026-03-01 → 2026-08-01 · 3 obs

○ 2016-12-25 12:17:38
● 2026-03-01 18:35:28
● 2026-08-01 18:41:28

●MXalt3.aspmx.l.google.com2026-03-01 → 2026-08-01 · 3 obs

○ 2016-12-25 12:17:38
● 2026-03-01 18:35:28
● 2026-08-01 18:41:28

●MXalt4.aspmx.l.google.com2026-03-01 → 2026-08-01 · 3 obs

○ 2016-12-25 12:17:38
● 2026-03-01 18:35:28
● 2026-08-01 18:41:28

●MXaspmx.l.google.com2026-03-01 → 2026-08-01 · 3 obs

○ 2016-12-25 12:17:38
● 2026-03-01 18:35:28
● 2026-08-01 18:41:28

○MXmx00.1and1.com2016-12-10 → 2016-12-25 · 4 obs

● 2016-12-10 23:50:10
● 2016-12-25 12:17:38
○ 2026-03-01 18:35:28
○ 2026-08-01 18:41:28

○MXmx01.1and1.com2016-12-10 → 2016-12-25 · 4 obs

● 2016-12-10 23:50:10
● 2016-12-25 12:17:38
○ 2026-03-01 18:35:28
○ 2026-08-01 18:41:28

●A104.21.27.1652026-05-13 → 2026-08-01 · 3 obs

○ 2026-03-01 18:35:28
● 2026-05-13 00:54:48
● 2026-08-01 18:41:28

●A172.67.169.1442026-05-13 → 2026-08-01 · 3 obs

○ 2026-03-01 18:35:28
● 2026-05-13 00:54:48
● 2026-08-01 18:41:28

○A216.250.120.2482016-12-10 → 2016-12-25 · 4 obs

● 2016-12-10 23:50:10
● 2016-12-25 12:17:38
○ 2026-03-01 18:35:28
○ 2026-08-01 18:41:28

○A2606:4700:3032::ac43:a9902026-05-13 → 2026-06-15 · 5 obs

○ 2026-03-01 18:35:28
● 2026-05-13 00:54:48
● 2026-06-15 07:18:54
○ 2026-07-30 07:30:06
○ 2026-08-01 18:41:28

●A2606:4700:3034::ac43:a9902026-07-30 → 2026-08-01 · 3 obs

○ 2026-06-15 07:18:54
● 2026-07-30 07:30:06
● 2026-08-01 18:41:28

●A2606:4700:3035::6815:1ba52026-05-13 → 2026-08-01 · 3 obs

○ 2026-03-01 18:35:28
● 2026-05-13 00:54:48
● 2026-08-01 18:41:28

○A2607:f1c0:1000:10:8da:2238:25bb:c8012016-12-10 → 2016-12-25 · 4 obs

● 2016-12-10 23:50:10
● 2016-12-25 12:17:38
○ 2026-03-01 18:35:28
○ 2026-08-01 18:41:28

○A43.209.38.1492026-03-01 → 2026-03-01 · 4 obs

○ 2016-12-25 12:17:38
● 2026-03-01 18:35:28
○ 2026-05-13 00:54:48
○ 2026-08-01 18:41:28

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
guru	v0n0.nic.guru, v0n1.nic.guru, v0n2.nic.guru, v0n3.nic.guru...	12 records
efficient.guru	hazel.ns.cloudflare.com, karl.ns.cloudflare.com	-

✅ Authoritative Response

Server:162.159.38.157

NS records: hazel.ns.cloudflare.com, karl.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for efficient.guru (unsigned zone)

⏱️ Timing

Total: 366ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.27.165, 172.67.169.144`
AAAA	2	`2606:4700:3034::ac43:a990, 2606:4700:3035::6815:1ba5`
NS	2	`hazel.ns.cloudflare.com, karl.ns.cloudflare.com`
MX	5	`aspmx.l.google.com (pri: 1), alt3.aspmx.l.google.com (pri: 10)...`
TXT	2	`google-site-verification=qEmkQaVR3Nmyq8d, v=spf1 include:_spf.google.com ~all`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`hazel.ns.cloudflare.com dns.cloudflare.c`

📌 Glue Records Collected

Total: 12

In-bailiwick: 12 (v0n0.nic.guru, v0n1.nic.guru, v0n2.nic.guru...)

Analysis

IP Addresses

efficient.guru resolves to four IP addresses: 104.21.27.165, 172.67.169.144, 2606:4700:3034::ac43:a990 and 2606:4700:3035::6815:1ba5.

Additional host names — stewartcreativedesign.com, apple-ser.com, isstek.com and two others — share IP numbers with efficient.guru.

Name Servers

efficient.guru is served by two delegated name servers, hazel.ns.cloudflare.com and karl.ns.cloudflare.com.

efficient.guru shares its name server setup with other domains, including lencohellas.com, empowermall.com, samsungrd.pl and two others.

efficient.guru partially shares its NS delegation with several other domains, including matcen.dk, emjones.com.to, lzpreslav.com and two others.

These name servers are regularly seen alongside rodrigo.ns.cloudflare.com and dakota.ns.cloudflare.com as name servers.

Host names with 6 IP numbers:

hazel.ns.cloudflare.com carries IP addresses 108.162.194.157, 162.159.38.157 and 172.64.34.157, with 3 other addresses beyond those.

karl.ns.cloudflare.com carries IP addresses 108.162.193.190, 172.64.33.190 and 173.245.59.190, with 3 other addresses beyond those.

Mail Servers

efficient.guru is handled by five mail servers: aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com and two others.

efficient.guru shares mail servers — at least in part — with other domains, including dkorins.com, innoxia.co.jp, onefootedcrowprojects.com and two others.

These mail servers are frequently used alongside mail servers alt3.aspmx.l.google.com, alt4.aspmx.l.google.com, aspmx2.googlemail.com and 3 other.

Host names with two IP numbers:

aspmx.l.google.com maps to two IP addresses — 142.251.163.27 and 2607:f8b0:4004:c17::1a.

alt1.aspmx.l.google.com maps to two IP addresses — 108.177.123.27 and 2800:3f0:4003:c0f::1b.

alt2.aspmx.l.google.com maps to two IP addresses — 172.253.116.26 and 2a00:1450:400b:c02::1a.

alt3.aspmx.l.google.com maps to two IP addresses — 192.178.223.26 and 2a00:1450:4009:c0f::1b.

alt4.aspmx.l.google.com maps to two IP addresses — 172.253.157.26 and 2a00:1450:400c:c23::1b.