`groundzerobooksltd.com`

DNSSEC	⚠️ Not signed
A	151.101.1.91^{🇺🇸 Fastly151.101.0.0/22}
A	151.101.65.91^{🇺🇸 Fastly151.101.64.0/22}
A	151.101.129.91^{🇺🇸 Fastly151.101.128.0/22}
A	151.101.193.91^{🇺🇸 Fastly151.101.192.0/22}
NS	`ns2.rackspace.com` ⭐
		A	65.61.188.4^{🇺🇸 RACKSPACE-LON65.61.188.0/24 Rackspace, 5000 Walzem Road, San Antonio, TX 78218}
			PTR	`ns2.rackspace.com`
NS	`ns.rackspace.com`
		A	69.20.95.4^{🇺🇸 RACKSPACE-DFW69.20.95.0/24 Rackspace, 5000 Walzem Road, San Antonio, TX 78218}
			PTR	`ns.rackspace.com`
MX	`mx1.emailsrvr.com` ⭐
		A	173.203.187.1^{🇺🇸 RACKSPACE-IAD173.203.128.0/18 Rackspace Managed Hosting, 9725 Data point drive, Suite 100, San Antonio, TX 78229}
			PTR	`mx1.emailsrvr.com`
MX	`mx2.emailsrvr.com`⁽²⁰⁾
		A	146.20.161.2^{🇺🇸 RACKSPACE-IAD146.20.0.0/16 Rackspace US Inc}
			PTR	`mx2.emailsrvr.com`
TXT	`google-site-verification=2CMRKg8PWjuSN2_F0zHkkOzHAS-FeRlwZABpZRb3A1o`
TXT	`v=spf1 include:spf.bibliopolis.com ~all`
SOA	`ns.rackspace.com`hostmaster@rackspace.com serial=1773214742

`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=1774649637

Previously MX for

groundzerobooksltd.com

Same first word

groundzerobooksltd.com

DNS History

14 records (8 active, 6 former)

○NSns.hmdnsgroup.com2007-11-11 → 2007-11-11 · 3 obs

● 2007-11-11 22:02:58
○ 2015-07-21 06:40:06
○ 2026-03-27 22:42:42

●NSns.rackspace.com2015-07-21 → 2026-03-27 · 3 obs

○ 2007-11-11 22:02:58
● 2015-07-21 06:40:06
● 2026-03-27 22:42:42

○NSns2.hmdnsgroup.com2007-11-11 → 2007-11-11 · 3 obs

● 2007-11-11 22:02:58
○ 2015-07-21 06:40:06
○ 2026-03-27 22:42:42

●NSns2.rackspace.com2015-07-21 → 2026-03-27 · 3 obs

○ 2007-11-11 22:02:58
● 2015-07-21 06:40:06
● 2026-03-27 22:42:42

○MXgroundzerobooksltd.com2007-11-11 → 2007-11-11 · 3 obs

● 2007-11-11 22:02:58
○ 2015-07-21 06:40:06
○ 2026-03-27 22:42:42

●MXmx1.emailsrvr.com2015-07-21 → 2026-03-27 · 3 obs

○ 2007-11-11 22:02:58
● 2015-07-21 06:40:06
● 2026-03-27 22:42:42

●MXmx2.emailsrvr.com2015-07-21 → 2026-03-27 · 3 obs

○ 2007-11-11 22:02:58
● 2015-07-21 06:40:06
● 2026-03-27 22:42:42

●A151.101.1.912026-03-25 → 2026-03-27 · 3 obs

○ 2020-03-22 04:17:34
● 2026-03-25 07:00:26
● 2026-03-27 22:42:42

●A151.101.129.912026-03-25 → 2026-03-27 · 3 obs

○ 2020-03-22 04:17:34
● 2026-03-25 07:00:26
● 2026-03-27 22:42:42

●A151.101.193.912026-03-25 → 2026-03-27 · 3 obs

○ 2020-03-22 04:17:34
● 2026-03-25 07:00:26
● 2026-03-27 22:42:42

●A151.101.65.912026-03-25 → 2026-03-27 · 3 obs

○ 2020-03-22 04:17:34
● 2026-03-25 07:00:26
● 2026-03-27 22:42:42

○A63.247.143.1822007-11-11 → 2007-11-11 · 3 obs

● 2007-11-11 22:02:58
○ 2015-07-21 06:40:06
○ 2026-03-27 22:42:42

○A67.192.143.32015-07-21 → 2017-03-16 · 5 obs

○ 2007-11-11 22:02:58
● 2015-07-21 06:40:06
● 2017-03-16 21:32:40
○ 2020-03-22 04:17:34
○ 2026-03-27 22:42:42

○A67.192.143.522020-03-22 → 2020-03-22 · 4 obs

○ 2017-03-16 21:32:40
● 2020-03-22 04:17:34
○ 2026-03-25 07:00:26
○ 2026-03-27 22:42:42

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
groundzerobooksltd.com	ns2.rackspace.com, ns.rackspace.com	2 records

✅ Authoritative Response

Server:65.61.188.4

NS records: ns2.rackspace.com, ns.rackspace.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for groundzerobooksltd.com (unsigned zone)

⏱️ Timing

Total: 317ms | Queries: -

📄 Records

Type	Count	Sample Data
A	4	`151.101.1.91, 151.101.193.91...`
NS	2	`ns.rackspace.com, ns2.rackspace.com`
MX	2	`mx2.emailsrvr.com (pri: 20), mx1.emailsrvr.com (pri: 10)`
TXT	2	`v=spf1 include:spf.bibliopolis.com ~all, google-site-verification=2CMRKg8PWjuSN2_`
SOA	1	`ns.rackspace.com hostmaster.rackspace.co`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns2.rackspace.com, ns.rackspace.com)

Analysis

IP Addresses

groundzerobooksltd.com resolves to four IPs: 151.101.1.91, 151.101.65.91, 151.101.129.91 and 151.101.193.91.

Other host names such as mojofury.bandcamp.com, kinfolk2.bandcamp.com, hanslavin.bandcamp.com, teen1.bandcamp.com and duncanfellowsband.bandcamp.com share IP numbers with groundzerobooksltd.com.

Name Servers

groundzerobooksltd.com is delegated to two name servers: ns2.rackspace.com and ns.rackspace.com.

groundzerobooksltd.com uses the same name server setup as other domains, including 109.52.92.in-addr.arpa, 503962-db1.sheilds.org, affordablehealthquotesforyou.com, 174.242.162.in-addr.arpa and amelishan.com.

At least part of the name servers for groundzerobooksltd.com are shared with other domains, for instance maxknowledge.org, driscollsb2b.biz, drua.net, imperiumcap.com and lichwalla.com.

These name servers are commonly used together with the name servers dns1.stabletransit.com, dns2.stabletransit.com, ns3.solucionwebdns.com, ns4.solucionwebdns.com, ns1.bibliopolis.com and ns2.bibliopolis.com.

Hostnames with a single IP

ns2.rackspace.com resolves to: 65.61.188.4.

ns.rackspace.com resolves to: 69.20.95.4.

Mail Servers

groundzerobooksltd.com is handled by two mail servers: mx1.emailsrvr.com and mx2.emailsrvr.com.

groundzerobooksltd.com uses the same mail server setup as other domains, for instance acnfgroup.com, viabilis.net, alcoholrehabgeorgia.com, promosunscreen.com and loveyourdrapery.ca.

groundzerobooksltd.com shares at least some mail servers with other domains, for example memberfusion.com, mankadesignstudio.com, picachomountain.com, solvusoft.com and soccerhotnews.com.

Hostnames with a single IP

mx1.emailsrvr.com resolves to: 173.203.187.1.

mx2.emailsrvr.com resolves to: 146.20.161.2.

groundzerobooksltd.com - robtex.com