`textbook-comparison.com`

DNSSEC	⚠️ Not signed
A	2607:f1c0:100f:f000::200^{🇺🇸 IONOS-AS2607:f1c0::/32 1&1 Internet Inc. 701 Lee Rd, Suite 300 Chesterbrook, PA 19087 US}
		PTR	`2607-f1c0-100f-f000-0000-0000-0000-0200.elastic-ssl.ui-r.com`
A	74.208.236.107^{🇺🇸 IONOS-AS74.208.0.0/16 IONOS Inc.}
NS	`ns1052.ui-dns.de` ⭐
		A	2607:f1c0:fe:53:185:132:32:52^{🇺🇸 IONOS-ANYCAST2607:f1c0:fe::/47 AS8560 global anycast services (more specific) 1&1 IONOS Inc. 701 Lee Rd, Suite 300 Chesterbrook, PA 19087 US}
			PTR	`ns1052.ui-dns.de`
		A	185.132.32.52^{🇩🇪 IONOS-ANYCAST185.132.32.0/22 IONOS DNSAS (eBGP DNS)}
			PTR	`ns1052.ui-dns.de`
NS	`ns1052.ui-dns.biz`
		A	2607:f1c0:fe:53:185:132:33:52^{🇺🇸 IONOS-ANYCAST2607:f1c0:fe::/47 AS8560 global anycast services (more specific) 1&1 IONOS Inc. 701 Lee Rd, Suite 300 Chesterbrook, PA 19087 US}
			PTR	`ns1052.ui-dns.biz`
		A	185.132.33.52^{🇩🇪 IONOS-ANYCAST185.132.32.0/22 IONOS DNSAS (eBGP DNS)}
			PTR	`ns1052.ui-dns.biz`
NS	`ns1052.ui-dns.com`
		A	2001:8d8:fe:53:0:d9a0:5234:100^{🇩🇪 IONOS-AS2001:8d8:fe::/47 IONOS AS8560 anycast more specific}
			PTR	`ns1052.ui-dns.com`
		A	217.160.82.52^{🇩🇪 IONOS-AS217.160.80.0/22 AS8560 anycast more specific}
			PTR	`ns1052.ui-dns.com`
NS	`ns1052.ui-dns.org`
		A	2001:8d8:fe:53:0:d9a0:5334:100^{🇩🇪 IONOS-AS2001:8d8:fe::/47 IONOS AS8560 anycast more specific}
			PTR	`ns1052.ui-dns.org`
		A	217.160.83.52^{🇩🇪 IONOS-AS217.160.80.0/22 AS8560 anycast more specific}
			PTR	`ns1052.ui-dns.org`
MX	`mx00.ionos.com` ⭐
		A	74.208.5.3^{🇺🇸 IONOS-AS74.208.0.0/16 IONOS Inc.}
			PTR	`mx00.perfora.net`
MX	`mx01.ionos.com` ⭐
		A	74.208.5.21^{🇺🇸 IONOS-AS74.208.0.0/16 IONOS Inc.}
			PTR	`mx01.perfora.net`
TXT	`v=spf1 include:_spf-us.ionos.com ~all`
SOA	`ns1052.ui-dns.de`hostmaster@1and1.com 2016-04-05 #8

`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=1784090482

Same first word

textbook-comparison.com

DNS History

18 records (8 active, 10 former)

○NSns-us.1and1-dns.com2016-12-20 → 2016-12-20 · 3 obs

● 2016-12-20 11:11:58
○ 2018-01-03 07:52:42
○ 2026-07-15 05:11:26

○NSns-us.1and1-dns.de2016-12-20 → 2016-12-20 · 3 obs

● 2016-12-20 11:11:58
○ 2018-01-03 07:52:42
○ 2026-07-15 05:11:26

○NSns-us.1and1-dns.org2016-12-20 → 2016-12-20 · 3 obs

● 2016-12-20 11:11:58
○ 2018-01-03 07:52:42
○ 2026-07-15 05:11:26

○NSns-us.1and1-dns.us2016-12-20 → 2016-12-20 · 3 obs

● 2016-12-20 11:11:58
○ 2018-01-03 07:52:42
○ 2026-07-15 05:11:26

●NSns1052.ui-dns.biz2018-01-03 → 2026-07-15 · 3 obs

○ 2016-12-20 11:11:58
● 2018-01-03 07:52:42
● 2026-07-15 05:11:26

●NSns1052.ui-dns.com2018-01-03 → 2026-07-15 · 3 obs

○ 2016-12-20 11:11:58
● 2018-01-03 07:52:42
● 2026-07-15 05:11:26

●NSns1052.ui-dns.de2018-01-03 → 2026-07-15 · 3 obs

○ 2016-12-20 11:11:58
● 2018-01-03 07:52:42
● 2026-07-15 05:11:26

●NSns1052.ui-dns.org2018-01-03 → 2026-07-15 · 3 obs

○ 2016-12-20 11:11:58
● 2018-01-03 07:52:42
● 2026-07-15 05:11:26

○MXmx00.1and1.com2016-12-20 → 2018-01-03 · 4 obs

● 2016-12-20 11:11:58
● 2018-01-03 07:52:42
○ 2026-02-28 04:18:58
○ 2026-07-15 05:11:26

●MXmx00.ionos.com2026-02-28 → 2026-07-15 · 3 obs

○ 2018-01-03 07:52:42
● 2026-02-28 04:18:58
● 2026-07-15 05:11:26

○MXmx01.1and1.com2016-12-20 → 2018-01-03 · 4 obs

● 2016-12-20 11:11:58
● 2018-01-03 07:52:42
○ 2026-02-28 04:18:58
○ 2026-07-15 05:11:26

●MXmx01.ionos.com2026-02-28 → 2026-07-15 · 3 obs

○ 2018-01-03 07:52:42
● 2026-02-28 04:18:58
● 2026-07-15 05:11:26

○A192.195.77.2492016-12-20 → 2026-03-10 · 4 obs

● 2016-12-20 11:11:58
● 2026-03-10 12:30:16
○ 2026-04-09 22:49:08
○ 2026-07-15 05:11:26

○A2001:8d8:100f:f000::2002026-04-09 → 2026-04-17 · 5 obs

○ 2026-03-10 12:30:16
● 2026-04-09 22:49:08
● 2026-04-17 04:37:10
○ 2026-07-02 14:05:00
○ 2026-07-15 05:11:26

○A217.160.0.602026-04-09 → 2026-04-17 · 5 obs

○ 2026-03-10 12:30:16
● 2026-04-09 22:49:08
● 2026-04-17 04:37:10
○ 2026-07-02 14:05:00
○ 2026-07-15 05:11:26

○A2607:f1c0:1000:7027:e7fb:44f3:34cf:20362016-12-20 → 2026-03-10 · 4 obs

● 2016-12-20 11:11:58
● 2026-03-10 12:30:16
○ 2026-04-09 22:49:08
○ 2026-07-15 05:11:26

●A2607:f1c0:100f:f000::2002026-07-02 → 2026-07-15 · 3 obs

○ 2026-04-17 04:37:10
● 2026-07-02 14:05:00
● 2026-07-15 05:11:26

●A74.208.236.1072026-07-02 → 2026-07-15 · 3 obs

○ 2026-04-17 04:37:10
● 2026-07-02 14:05:00
● 2026-07-15 05:11:26

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, k.gtld-servers.net, e.gtld-servers.net, c.gtld-servers.net...	-
textbook-comparison.com	ns1052.ui-dns.de, ns1052.ui-dns.biz, ns1052.ui-dns.org, ns1052.ui-dns.com	2 records

✅ Authoritative Response

Server:185.132.32.52

NS records: ns1052.ui-dns.de, ns1052.ui-dns.biz, ns1052.ui-dns.org, ns1052.ui-dns.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for textbook-comparison.com (unsigned zone)

⏱️ Timing

Total: 416ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`74.208.236.107`
AAAA	1	`2607:f1c0:100f:f000::200`
NS	4	`ns1052.ui-dns.biz, ns1052.ui-dns.com...`
MX	2	`mx00.ionos.com (pri: 10), mx01.ionos.com (pri: 10)`
TXT	1	`v=spf1 include:_spf-us.ionos.com ~all`
SOA	1	`ns1052.ui-dns.de hostmaster.1and1.com`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns1052.ui-dns.com, ns1052.ui-dns.com)

Analysis

IP Addresses

textbook-comparison.com has two IP addresses: 74.208.236.107 and 2607:f1c0:100f:f000::200

Among the host names that share IP numbers with textbook-comparison.com are cyanidecode.info, podcastbite.com, swccfl.com and two others.

Name Servers

The domain textbook-comparison.com is delegated to these four name servers: ns1052.ui-dns.biz, ns1052.ui-dns.com, ns1052.ui-dns.de and ns1052.ui-dns.org.

The name servers of textbook-comparison.com overlap at least partially with those of other domains — among them bnn4.com, reboarder-kindersitz.info, photovoltaik-brandenburg.de and two more.

These name servers commonly appear in delegations together with ns1069.ui-dns.biz, ns1021.ui-dns.com, ns1083.ui-dns.de and 3 other.

Each of the four hosts ns1052.ui-dns.biz, ns1052.ui-dns.com, ns1052.ui-dns.de and ns1052.ui-dns.org has two IP addresses. ns1052.ui-dns.biz points to 185.132.33.52 and 2607:f1c0:fe:53:185:132:33:52. ns1052.ui-dns.com points to 217.160.82.52 and 2001:8d8:fe:53:0:d9a0:5234:100. ns1052.ui-dns.de points to 185.132.32.52 and 2607:f1c0:fe:53:185:132:32:52. ns1052.ui-dns.org points to 217.160.83.52 and 2001:8d8:fe:53:0:d9a0:5334:100.

Mail Servers

The MX records for textbook-comparison.com point to two mail servers: mx00.ionos.com and mx01.ionos.com.

textbook-comparison.com has the same mail server arrangement as a number of other domains, for example bijouera.com, breslauer.net, tes-ga.com and two more.

Both mx00.ionos.com and mx01.ionos.com have a single IP address each — mx00.ionos.com resolves to 74.208.5.3 while mx01.ionos.com resolves to 74.208.5.21.

textbook-comparison.com - robtex.com