springframework.guru - dns.ninja

`springframework.guru`

DNSSEC	⚠️ Not signed
A	2606:4700:3108::ac42:28c8^{🇺🇸 Cloudflare2606:4700:3108::/48 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3108::ac42:2b38^{🇺🇸 Cloudflare2606:4700:3108::/48 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.66.40.200^{🇺🇸 Cloudflare172.66.40.0/21 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.66.43.56^{🇺🇸 Cloudflare172.66.40.0/21 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`etta.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3a9c^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`etta.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c09c^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`etta.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:209c^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`etta.ns.cloudflare.com`
		A	108.162.192.156^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`etta.ns.cloudflare.com`
		A	172.64.32.156^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`etta.ns.cloudflare.com`
		A	173.245.58.156^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`etta.ns.cloudflare.com`
NS	`joel.ns.cloudflare.com`
		A	2606:4700:58::adf5:3bb8^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`joel.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c1b8^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`joel.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:21b8^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`joel.ns.cloudflare.com`
		A	108.162.193.184^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`joel.ns.cloudflare.com`
		A	172.64.33.184^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`joel.ns.cloudflare.com`
		A	173.245.59.184^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`joel.ns.cloudflare.com`
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c08::1b^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`bi-in-f27.1e100.net`
		A	172.253.139.26^{🇺🇸 Google172.253.139.0/24}
			PTR	`yuiadsk-in-f26.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽⁵⁾
		A	2800:3f0:4003:c0f::1a^{🇨🇱 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::1b^{🇮🇪 Google2a00:1450:400b::/48}
			PTR	`dj-in-f27.1e100.net`
		A	172.253.116.27^{🇺🇸 Google172.253.116.0/24}
			PTR	`dj-in-f27.1e100.net`
MX	`aspmx2.googlemail.com`⁽¹⁰⁾
		A	2800:3f0:4003:c0f::1a^{🇨🇱 Google2800:3f0:4003::/48}
		A	108.177.123.27^{🇺🇸 Google108.177.123.0/24}
			PTR	`lcscld-in-f27.1e100.net`
MX	`aspmx3.googlemail.com`⁽¹⁰⁾
		A	2a00:1450:400b:c02::1b^{🇮🇪 Google2a00:1450:400b::/48}
			PTR	`dj-in-f27.1e100.net`
		A	172.253.116.27^{🇺🇸 Google172.253.116.0/24}
			PTR	`dj-in-f27.1e100.net`
TXT	`google-site-verification=Og5_LNaiigG6F3Zq5VnhA6XiuxnOfUpARpEHHI9Fqoc`
TXT	`v=spf1 include:spf.mandrillapp.com include:helpscoutemail.com ?all`
HTTPS	HTTP/2 ✓ hints match
		IPv4 hints	172.66.40.200, 172.66.43.56
		IPv6 hints	2606:4700:3108::ac42:28c8, 2606:4700:3108::ac42:2b38
SOA	`etta.ns.cloudflare.com`dns@cloudflare.com serial=2406791771

`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=1781444577

rank #512499 globally
rank #65 in the tld

Subdomains

www.springframework.guru

courses.springframework.guru

Same first word

DNS History

18 records (11 active, 7 former)

●NSetta.ns.cloudflare.com2017-06-07 → 2026-06-14 · 3 obs

○ 2016-12-05 00:39:02
● 2017-06-07 11:36:58
● 2026-06-14 13:57:46

●NSjoel.ns.cloudflare.com2017-06-07 → 2026-06-14 · 3 obs

○ 2016-12-05 00:39:02
● 2017-06-07 11:36:58
● 2026-06-14 13:57:46

○NSns-1274.awsdns-31.org2016-12-05 → 2016-12-05 · 3 obs

● 2016-12-05 00:39:02
○ 2017-06-07 11:36:58
○ 2026-06-14 13:57:46

○NSns-1858.awsdns-40.co.uk2016-12-05 → 2016-12-05 · 3 obs

● 2016-12-05 00:39:02
○ 2017-06-07 11:36:58
○ 2026-06-14 13:57:46

○NSns-449.awsdns-56.com2016-12-05 → 2016-12-05 · 3 obs

● 2016-12-05 00:39:02
○ 2017-06-07 11:36:58
○ 2026-06-14 13:57:46

○NSns-538.awsdns-03.net2016-12-05 → 2016-12-05 · 3 obs

● 2016-12-05 00:39:02
○ 2017-06-07 11:36:58
○ 2026-06-14 13:57:46

●MXalt1.aspmx.l.google.com2016-12-05 → 2026-06-14 · 2 obs

● 2016-12-05 00:39:02
● 2026-06-14 13:57:46

●MXalt2.aspmx.l.google.com2016-12-05 → 2026-06-14 · 2 obs

● 2016-12-05 00:39:02
● 2026-06-14 13:57:46

●MXaspmx.l.google.com2016-12-05 → 2026-06-14 · 2 obs

● 2016-12-05 00:39:02
● 2026-06-14 13:57:46

●MXaspmx2.googlemail.com2016-12-05 → 2026-06-14 · 2 obs

● 2016-12-05 00:39:02
● 2026-06-14 13:57:46

●MXaspmx3.googlemail.com2016-12-05 → 2026-06-14 · 2 obs

● 2016-12-05 00:39:02
● 2026-06-14 13:57:46

○A104.25.60.352017-06-07 → 2017-06-07 · 4 obs

○ 2016-12-05 00:39:02
● 2017-06-07 11:36:58
○ 2026-02-15 21:03:48
○ 2026-06-14 13:57:46

○A104.25.61.352017-06-07 → 2017-06-07 · 4 obs

○ 2016-12-05 00:39:02
● 2017-06-07 11:36:58
○ 2026-02-15 21:03:48
○ 2026-06-14 13:57:46

●A172.66.40.2002026-02-15 → 2026-06-14 · 3 obs

○ 2017-06-07 11:36:58
● 2026-02-15 21:03:48
● 2026-06-14 13:57:46

●A172.66.43.562026-02-15 → 2026-06-14 · 3 obs

○ 2017-06-07 11:36:58
● 2026-02-15 21:03:48
● 2026-06-14 13:57:46

●A2606:4700:3108::ac42:28c82026-02-15 → 2026-06-14 · 3 obs

○ 2017-06-07 11:36:58
● 2026-02-15 21:03:48
● 2026-06-14 13:57:46

●A2606:4700:3108::ac42:2b382026-02-15 → 2026-06-14 · 3 obs

○ 2017-06-07 11:36:58
● 2026-02-15 21:03:48
● 2026-06-14 13:57:46

○A54.175.35.702016-12-05 → 2016-12-05 · 3 obs

● 2016-12-05 00:39:02
○ 2017-06-07 11:36:58
○ 2026-06-14 13:57:46

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
guru	v0n0.nic.guru, v0n1.nic.guru, v0n2.nic.guru, v0n3.nic.guru...	-
springframework.guru	etta.ns.cloudflare.com, joel.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.32.156

NS records: etta.ns.cloudflare.com, joel.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for springframework.guru (unsigned zone)

⏱️ Timing

Total: 512ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.66.40.200, 172.66.43.56`
AAAA	2	`2606:4700:3108::ac42:28c8, 2606:4700:3108::ac42:2b38`
NS	2	`etta.ns.cloudflare.com, joel.ns.cloudflare.com`
MX	5	`aspmx.l.google.com (pri: 1), aspmx2.googlemail.com (pri: 10)...`
TXT	2	`google-site-verification=Og5_LNaiigG6F3Z, v=spf1 include:spf.mandrillapp.com inclu`
HTTPS	1	`{"priority":1,"target":".","alpn":["h2"]`
SOA	1	`etta.ns.cloudflare.com dns.cloudflare.co`

Analysis

Hierarchy

www.springframework.guru and courses.springframework.guru each fall under springframework.guru as their parent domain.

IP Addresses

springframework.guru resolves to four IP addresses: 172.66.40.200, 172.66.43.56, 2606:4700:3108::ac42:28c8 and 2606:4700:3108::ac42:2b38.

Two other host names, along with sg-pl.vizury.com, ge.mba and www.springframework.guru, also share IP numbers with springframework.guru.

Name Servers

DNS delegation for springframework.guru points to two name servers: etta.ns.cloudflare.com and joel.ns.cloudflare.com.

springframework.guru shares its NS records with other domains, for example frhd.it, pueblosdeperu.net, pueblosdeestadosunidos.com and two others.

springframework.guru has at least partial name server overlap with other domains, such as soilscienceaustralia.org.au, matchmehappy.co.uk, jumdc.com and two others.

It is common to see these name servers used together with name servers april.ns.cloudflare.com and vick.ns.cloudflare.com.

DNS names with 6 IP addresses:

etta.ns.cloudflare.com has IP addresses 108.162.192.156, 172.64.32.156 and 173.245.58.156, plus 3 other.

joel.ns.cloudflare.com has IP addresses 108.162.193.184, 172.64.33.184 and 173.245.59.184, plus 3 other.

Mail Servers

springframework.guru is handled by five mail servers: aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx.l.google.com and two others.

There is at least a partial MX overlap between springframework.guru and other domains, including ev-genius.com, ns500841.ns500821.ns500841.ns500821.ns500821.ns500795.ns500794.ns500794.ns500795.ns500794.ns500821.ns500821.ns500790.ns500795.lustypartnersfinder.com, herbnjoy.com and two others.

These mail servers tend to appear in combination with mail servers alt1.aspmx.l.google.com, alt2.aspmx.l.google.com, alt3.aspmx.l.google.com and 3 others.

Host names that have two IP addresses:

aspmx2.googlemail.com has two IP addresses: 108.177.123.27 and 2800:3f0:4003:c0f::1a.

aspmx3.googlemail.com has two IP addresses: 172.253.116.27 and 2a00:1450:400b:c02::1b.

aspmx.l.google.com has two IP addresses: 172.253.139.26 and 2607:f8b0:4004:c08::1b.

alt1.aspmx.l.google.com has two IP addresses: 108.177.123.27 and 2800:3f0:4003:c0f::1a.

alt2.aspmx.l.google.com has two IP addresses: 172.253.116.27 and 2a00:1450:400b:c02::1b.

Host names pointing to 2800:3f0:4003:c0f::1a IP addresses: aspmx2.googlemail.com and alt1.aspmx.l.google.com.

Host names pointing to 108.177.123.27 IP addresses: aspmx2.googlemail.com and alt1.aspmx.l.google.com.

Host names pointing to 2a00:1450:400b:c02::1b IP addresses: aspmx3.googlemail.com and alt2.aspmx.l.google.com.

Host names pointing to 172.253.116.27 IP addresses: aspmx3.googlemail.com and alt2.aspmx.l.google.com.