holbert.org - dns.ninja

`holbert.org`

DNSSEC	⚠️ Not signed
A	2606:4700:3033::ac43:cd1c^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3036::6815:168a^{🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.22.138^{Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.205.28^{🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`clarissa.ns.cloudflare.com` ⭐
		A	2606:4700:50::a29f:267b^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`clarissa.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c27b^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`clarissa.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:227b^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`clarissa.ns.cloudflare.com`
		A	108.162.194.123^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`clarissa.ns.cloudflare.com`
		A	162.159.38.123^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`clarissa.ns.cloudflare.com`
		A	172.64.34.123^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`clarissa.ns.cloudflare.com`
NS	`ray.ns.cloudflare.com`
		A	2606:4700:58::adf5:3b8a^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ray.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c18a^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`ray.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:218a^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`ray.ns.cloudflare.com`
		A	108.162.193.138^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ray.ns.cloudflare.com`
		A	172.64.33.138^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ray.ns.cloudflare.com`
		A	173.245.59.138^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ray.ns.cloudflare.com`
MX	`eforward1.registrar-servers.com` ⭐
		A	162.255.118.51^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`eforward1.registrar-servers.com`
			PTR	`eforward3.registrar-servers.com`
MX	`eforward2.registrar-servers.com` ⭐
		A	162.255.118.52^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`eforward2.registrar-servers.com`
MX	`eforward3.registrar-servers.com` ⭐
		A	162.255.118.51^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`eforward1.registrar-servers.com`
			PTR	`eforward3.registrar-servers.com`
MX	`eforward4.registrar-servers.com`⁽¹⁵⁾
		A	162.255.118.52^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`eforward2.registrar-servers.com`
MX	`eforward5.registrar-servers.com`⁽²⁰⁾
		A	162.255.118.51^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`eforward1.registrar-servers.com`
			PTR	`eforward3.registrar-servers.com`
TXT	`v=spf1 include:spf.efwd.registrar-servers.com ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.22.138, 172.67.205.28
		IPv6 hints	2606:4700:3033::ac43:cd1c, 2606:4700:3036::6815:168a
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=132, name=cloudflare-ech.com
SOA	`clarissa.ns.cloudflare.com`dns@cloudflare.com serial=2405613419

`org`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a0.org.afilias-nst.info` ⭐ ⚠️ Not in parent delegation
	NS	`a2.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`b0.org.afilias-nst.org`
	NS	`b2.org.afilias-nst.org`
	NS	`c0.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`d0.org.afilias-nst.org`
	SOA	`a0.org.afilias-nst.info`hostmaster@donuts.email serial=1783151507

Same first word

holbert.net

holbert.name

holbert.com

holbert.us

holbert.org

holbert.com.mx

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DNS History

21 records (11 active, 10 former)

○NSbuy.internettraffic.com2015-07-14 → 2015-07-14 · 3 obs

● 2015-07-14 20:54:04
○ 2015-11-14 21:20:28
○ 2026-07-04 08:15:18

●NSclarissa.ns.cloudflare.com2026-04-09 → 2026-07-04 · 3 obs

○ 2017-07-06 21:04:00
● 2026-04-09 12:39:34
● 2026-07-04 08:15:18

○NSns11.domaincontrol.com2015-11-14 → 2016-09-13 · 5 obs

○ 2015-07-14 20:54:04
● 2015-11-14 21:20:28
● 2016-09-13 17:55:54
○ 2017-07-06 21:04:00
○ 2026-07-04 08:15:18

○NSns12.domaincontrol.com2015-11-14 → 2016-09-13 · 5 obs

○ 2015-07-14 20:54:04
● 2015-11-14 21:20:28
● 2016-09-13 17:55:54
○ 2017-07-06 21:04:00
○ 2026-07-04 08:15:18

●NSray.ns.cloudflare.com2026-04-09 → 2026-07-04 · 3 obs

○ 2017-07-06 21:04:00
● 2026-04-09 12:39:34
● 2026-07-04 08:15:18

○NSsell.internettraffic.com2015-07-14 → 2015-07-14 · 3 obs

● 2015-07-14 20:54:04
○ 2015-11-14 21:20:28
○ 2026-07-04 08:15:18

●MXeforward1.registrar-servers.com2026-04-09 → 2026-07-04 · 3 obs

○ 2017-07-06 21:04:00
● 2026-04-09 12:39:34
● 2026-07-04 08:15:18

●MXeforward2.registrar-servers.com2026-04-09 → 2026-07-04 · 3 obs

○ 2017-07-06 21:04:00
● 2026-04-09 12:39:34
● 2026-07-04 08:15:18

●MXeforward3.registrar-servers.com2026-04-09 → 2026-07-04 · 3 obs

○ 2017-07-06 21:04:00
● 2026-04-09 12:39:34
● 2026-07-04 08:15:18

●MXeforward4.registrar-servers.com2026-04-09 → 2026-07-04 · 3 obs

○ 2017-07-06 21:04:00
● 2026-04-09 12:39:34
● 2026-07-04 08:15:18

●MXeforward5.registrar-servers.com2026-04-09 → 2026-07-04 · 3 obs

○ 2017-07-06 21:04:00
● 2026-04-09 12:39:34
● 2026-07-04 08:15:18

○MXmailstore1.secureserver.net2015-11-14 → 2016-09-13 · 4 obs

● 2015-11-14 21:20:28
● 2016-09-13 17:55:54
○ 2017-07-06 21:04:00
○ 2026-07-04 08:15:18

○MXsmtp.secureserver.net2015-11-14 → 2016-09-13 · 4 obs

● 2015-11-14 21:20:28
● 2016-09-13 17:55:54
○ 2017-07-06 21:04:00
○ 2026-07-04 08:15:18

●A104.21.22.1382026-04-09 → 2026-07-04 · 3 obs

○ 2017-07-06 21:04:00
● 2026-04-09 12:39:34
● 2026-07-04 08:15:18

●A172.67.205.282026-04-09 → 2026-07-04 · 3 obs

○ 2017-07-06 21:04:00
● 2026-04-09 12:39:34
● 2026-07-04 08:15:18

○A2606:4700:3033::6815:168a2026-04-09 → 2026-06-11 · 4 obs

○ 2017-07-06 21:04:00
● 2026-04-09 12:39:34
● 2026-06-11 17:23:02
○ 2026-07-04 08:15:18

●A2606:4700:3033::ac43:cd1c2026-07-04 → 2026-07-04 · 2 obs

○ 2026-06-11 17:23:02
● 2026-07-04 08:15:18

●A2606:4700:3036::6815:168a2026-07-04 → 2026-07-04 · 2 obs

○ 2026-06-11 17:23:02
● 2026-07-04 08:15:18

○A2606:4700:3036::ac43:cd1c2026-04-09 → 2026-06-11 · 4 obs

○ 2017-07-06 21:04:00
● 2026-04-09 12:39:34
● 2026-06-11 17:23:02
○ 2026-07-04 08:15:18

○A50.63.202.442015-11-14 → 2016-09-13 · 5 obs

○ 2015-07-14 20:54:04
● 2015-11-14 21:20:28
● 2016-09-13 17:55:54
○ 2017-07-06 21:04:00
○ 2026-07-04 08:15:18

○A69.172.201.2082015-07-14 → 2015-07-14 · 3 obs

● 2015-07-14 20:54:04
○ 2015-11-14 21:20:28
○ 2026-07-04 08:15:18

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	b2.org.afilias-nst.org, b0.org.afilias-nst.org, d0.org.afilias-nst.org	-
holbert.org	ray.ns.cloudflare.com, clarissa.ns.cloudflare.com	-

✅ Authoritative Response

Server:108.162.194.123

NS records: ray.ns.cloudflare.com, clarissa.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for holbert.org (unsigned zone)

⏱️ Timing

Total: 1780ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.205.28, 104.21.22.138`
AAAA	2	`2606:4700:3033::ac43:cd1c, 2606:4700:3036::6815:168a`
NS	2	`clarissa.ns.cloudflare.com, ray.ns.cloudflare.com`
MX	5	`eforward1.registrar-servers.com (pri: 10, eforward2.registrar-servers.com (pri: 10...`
TXT	1	`v=spf1 include:spf.efwd.registrar-server`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`clarissa.ns.cloudflare.com dns.cloudflar`

Analysis

IP Addresses

holbert.org resolves to four IP addresses: 104.21.22.138, 172.67.205.28, 2606:4700:3033::ac43:cd1c and 2606:4700:3036::6815:168a.

Additional host names — boothbooks.co.uk, aci.or.id, mail.justmisha.com and two others — share IP numbers with holbert.org.

Name Servers

The NS records for holbert.org delegate to clarissa.ns.cloudflare.com and ray.ns.cloudflare.com.

holbert.org shares its name server setup with other domains, including arrivall.co, 4it.ru, cnl-europe.com and two others.

holbert.org has at least partial name server overlap with other domains, such as trendtraderupdatesmail.com, hipopotamo.com, rhodium.co.il and two others.

These name servers tend to appear together with the name servers jay.ns.cloudflare.com, maleah.ns.cloudflare.com and marjory.ns.cloudflare.com.

Host names with 6 IP numbers:

clarissa.ns.cloudflare.com maps to 108.162.194.123, 162.159.38.123, 172.64.34.123 and 3 additional IP addresses.

ray.ns.cloudflare.com maps to 108.162.193.138, 172.64.33.138, 173.245.59.138 and 3 additional IP addresses.

Mail Servers

holbert.org is handled by five mail servers: eforward1.registrar-servers.com, eforward2.registrar-servers.com, eforward3.registrar-servers.com and two others.

holbert.org shares mail servers — at least in part — with other domains, including cobra4v.com, 999quanxun.com, basicallyfleetdogfish.click and two others.

These mail servers tend to be used in combination with the mail servers eforward4.registrar-servers.com and eforward5.registrar-servers.com.

Host names pointing to a single IP address:

eforward1.registrar-servers.com resolves to the IP address 162.255.118.51.

eforward2.registrar-servers.com resolves to the IP address 162.255.118.52.

eforward3.registrar-servers.com resolves to the IP address 162.255.118.51.

eforward4.registrar-servers.com resolves to the IP address 162.255.118.52.

eforward5.registrar-servers.com resolves to the IP address 162.255.118.51.

eforward1.registrar-servers.com, eforward3.registrar-servers.com and eforward5.registrar-servers.com are host names that all point to 162.255.118.51.

eforward2.registrar-servers.com and eforward4.registrar-servers.com each have 162.255.118.52 IP addresses.