`firstbooks.net`

DNSSEC	⚠️ Not signed
A	2606:4700:3031::ac43:92b1^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::6815:419b^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.65.155^{Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.146.177^{🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`holly.ns.cloudflare.com` ⭐
		A	2606:4700:50::a29f:2685^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`holly.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c285^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`holly.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2285^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`holly.ns.cloudflare.com`
		A	108.162.194.133^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`holly.ns.cloudflare.com`
		A	162.159.38.133^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`holly.ns.cloudflare.com`
		A	172.64.34.133^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`holly.ns.cloudflare.com`
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`
MX	`smtp.google.com` ⭐
		A	2607:f8b0:4004:c1d::1a^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`ww-in-f26.1e100.net`
		A	2607:f8b0:4004:c1d::1b^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`ww-in-f27.1e100.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	142.251.167.26^{🇺🇸 Google142.251.167.0/24}
			PTR	`ww-in-f26.1e100.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`
TXT	`google-site-verification=vlIr7Du1PmBLMpapXGskHxraq2NHiheCZlKBvhhzEBU`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4	104.21.65.155, 172.67.146.177
		IPv6	2606:4700:3031::ac43:92b1, 2606:4700:3037::6815:419b
SOA	`holly.ns.cloudflare.com`dns@cloudflare.com serial=2399505617

`net`

	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=1774738472

Same first word

firstbooks.ru

firstbooks.net

firstbooks.com

firstbooks.org

Similar names

robskisoft.com

DNS History

23 records (7 active, 16 former)

●NSholly.ns.cloudflare.com2026-03-25 → 2026-03-28 · 3 obs

○ 2017-11-27 14:24:00
● 2026-03-25 23:49:12
● 2026-03-28 23:08:04

●NSjermaine.ns.cloudflare.com2026-03-25 → 2026-03-28 · 3 obs

○ 2017-11-27 14:24:00
● 2026-03-25 23:49:12
● 2026-03-28 23:08:04

○NSns1.dsredirection.com2016-12-06 → 2016-12-06 · 4 obs

○ 2016-03-26 04:17:46
● 2016-12-06 05:39:50
○ 2017-11-27 14:24:00
○ 2026-03-28 23:08:04

○NSns1.sedoparking.com2017-11-27 → 2017-11-27 · 4 obs

○ 2016-12-06 05:39:50
● 2017-11-27 14:24:00
○ 2026-03-25 23:49:12
○ 2026-03-28 23:08:04

○NSns1stv.name.com2015-07-26 → 2016-03-26 · 4 obs

● 2015-07-26 17:16:32
● 2016-03-26 04:17:46
○ 2016-12-06 05:39:50
○ 2026-03-28 23:08:04

○NSns2.dsredirection.com2016-12-06 → 2016-12-06 · 4 obs

○ 2016-03-26 04:17:46
● 2016-12-06 05:39:50
○ 2017-11-27 14:24:00
○ 2026-03-28 23:08:04

○NSns2.sedoparking.com2017-11-27 → 2017-11-27 · 4 obs

○ 2016-12-06 05:39:50
● 2017-11-27 14:24:00
○ 2026-03-25 23:49:12
○ 2026-03-28 23:08:04

○NSns2jqz.name.com2015-07-26 → 2016-03-26 · 4 obs

● 2015-07-26 17:16:32
● 2016-03-26 04:17:46
○ 2016-12-06 05:39:50
○ 2026-03-28 23:08:04

○NSns3dkz.name.com2015-07-26 → 2016-03-26 · 4 obs

● 2015-07-26 17:16:32
● 2016-03-26 04:17:46
○ 2016-12-06 05:39:50
○ 2026-03-28 23:08:04

○NSns4lqx.name.com2015-07-26 → 2016-03-26 · 4 obs

● 2015-07-26 17:16:32
● 2016-03-26 04:17:46
○ 2016-12-06 05:39:50
○ 2026-03-28 23:08:04

○MXlocalhost2017-11-27 → 2017-11-27 · 3 obs

● 2017-11-27 14:24:00
○ 2026-03-25 23:49:12
○ 2026-03-28 23:08:04

●MXsmtp.google.com2026-03-25 → 2026-03-28 · 3 obs

○ 2017-11-27 14:24:00
● 2026-03-25 23:49:12
● 2026-03-28 23:08:04

●A104.21.65.1552026-03-25 → 2026-03-28 · 3 obs

○ 2017-11-27 14:24:00
● 2026-03-25 23:49:12
● 2026-03-28 23:08:04

●A172.67.146.1772026-03-25 → 2026-03-28 · 3 obs

○ 2017-11-27 14:24:00
● 2026-03-25 23:49:12
● 2026-03-28 23:08:04

○A208.73.211.1792016-12-06 → 2016-12-06 · 4 obs

○ 2016-03-26 04:17:46
● 2016-12-06 05:39:50
○ 2017-11-27 14:24:00
○ 2026-03-28 23:08:04

○A208.73.211.1832016-12-06 → 2016-12-06 · 4 obs

○ 2016-03-26 04:17:46
● 2016-12-06 05:39:50
○ 2017-11-27 14:24:00
○ 2026-03-28 23:08:04

○A208.73.211.1922016-12-06 → 2016-12-06 · 4 obs

○ 2016-03-26 04:17:46
● 2016-12-06 05:39:50
○ 2017-11-27 14:24:00
○ 2026-03-28 23:08:04

○A208.73.211.1952016-12-06 → 2016-12-06 · 4 obs

○ 2016-03-26 04:17:46
● 2016-12-06 05:39:50
○ 2017-11-27 14:24:00
○ 2026-03-28 23:08:04

●A2606:4700:3031::ac43:92b12026-03-25 → 2026-03-28 · 3 obs

○ 2017-11-27 14:24:00
● 2026-03-25 23:49:12
● 2026-03-28 23:08:04

●A2606:4700:3037::6815:419b2026-03-25 → 2026-03-28 · 3 obs

○ 2017-11-27 14:24:00
● 2026-03-25 23:49:12
● 2026-03-28 23:08:04

○A72.52.4.1202017-11-27 → 2017-11-27 · 4 obs

○ 2016-12-06 05:39:50
● 2017-11-27 14:24:00
○ 2026-03-25 23:49:12
○ 2026-03-28 23:08:04

○A8.5.1.512015-07-26 → 2016-03-26 · 4 obs

● 2015-07-26 17:16:32
● 2016-03-26 04:17:46
○ 2016-12-06 05:39:50
○ 2026-03-28 23:08:04

○PTRns1.dsredirection.com2016-12-06 → 2016-12-06 · 3 obs

● 2016-12-06 05:39:50
○ 2017-11-27 14:24:00
○ 2026-03-28 23:08:04

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
net	m.gtld-servers.net, k.gtld-servers.net, b.gtld-servers.net, f.gtld-servers.net...	-
firstbooks.net	holly.ns.cloudflare.com, jermaine.ns.cloudflare.com	-

✅ Authoritative Response

Server:162.159.44.157

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for firstbooks.net (unsigned zone)

⏱️ Timing

Total: 774ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.146.177, 104.21.65.155`
AAAA	2	`2606:4700:3037::6815:419b, 2606:4700:3031::ac43:92b1`
NS	2	`holly.ns.cloudflare.com, jermaine.ns.cloudflare.com`
MX	1	`smtp.google.com (pri: 5)`
TXT	1	`google-site-verification=vlIr7Du1PmBLMpa`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`holly.ns.cloudflare.com dns.cloudflare.c`

Analysis

IP Addresses

firstbooks.net points to four IP numbers: 2606:4700:3031::ac43:92b1, 2606:4700:3037::6815:419b, 104.21.65.155 and 172.67.146.177.

Other host names, for instance mensajero.com, umwteknologipangan.ac.id, aqso.net, gebaos.com and tenerg.cn share IP numbers with firstbooks.net.

Name Servers

Delegation for firstbooks.net rests with two name servers, holly.ns.cloudflare.com and jermaine.ns.cloudflare.com.

firstbooks.net shares the same name server setup as other domains, including organic-tona.com, masteriplatino.com, accountinghelp.us, television-envivo.co and dyromoda.com.

firstbooks.net at least partially shares name servers with other domains, for instance sturgiscompany.com, dzuho.com, drolladdug.rest, ammirtrucc.world and topfacebook.com.

these name servers are commonly used with dalary.ns.cloudflare.com, gannon.ns.cloudflare.com and joyce.ns.cloudflare.com.

Host names with six IP numbers: holly.ns.cloudflare.com points to: 2606:4700:50::a29f:2685, 2803:f800:50::6ca2:c285, 2a06:98c1:50::ac40:2285, 108.162.194.133, 162.159.38.133 and 172.64.34.133. jermaine.ns.cloudflare.com points to: 2606:4700:58::a29f:2c9d, 2803:f800:50::6ca2:c39d, 2a06:98c1:50::ac40:239d, 108.162.195.157, 162.159.44.157 and 172.64.35.157.

Mail Servers

firstbooks.net is handled by a single mail server, smtp.google.com.

firstbooks.net uses the same mail server configuration as other domains, such as jbcreativeproductions.com, eyecontacteyecare.com, snkmedia.nl, eyu.it and aixploria.com.

firstbooks.net shares mail servers with other domains at least in part, for instance dhapsi.com, institutociclosensino.com.br, vestor.id, therawfoodworld.com and bambui.com.br.

These mail servers are often used with alt1.aspmx.l.google.com, alt2.aspmx.l.google.com, alt3.aspmx.l.google.com, alt4.aspmx.l.google.com and aspmx.l.google.com.

Host smtp.google.com points to nine IP numbers: 2607:f8b0:4004:c1d::1a, 2607:f8b0:4004:c1d::1b, 2607:f8b0:4004:c23::1a, 2607:f8b0:4004:c23::1b, 142.251.167.26, 142.251.167.27, 172.253.139.26, 192.178.155.26 and 192.178.155.27.

firstbooks.net - robtex.com

firstbooks.net

net

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

IP Addresses

Name Servers

Mail Servers

`firstbooks.net`

`net`