ref4ref.com - dns.ninja

`ref4ref.com`

DNSSEC	⚠️ Not signed
A	89.31.143.90^{🇩🇪 UDAG89.31.143.0/24}
NS	`ns.udag.de` ⭐
		A	2001:8d8:fe:53:217:160:80:253^{🇩🇪 IONOS-AS2001:8d8:fe::/47 IONOS AS8560 anycast more specific}
			PTR	`ns.udag.de`
		A	217.160.80.253^{🇩🇪 IONOS-AS217.160.80.0/22 AS8560 anycast more specific}
			PTR	`ns.udag.de`
NS	`ns.udag.net`
		A	2607:f1c0:fe:53:185:132:33:253^{🇺🇸 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	`ns.udag.net`
		A	185.132.33.253^{🇩🇪 IONOS-ANYCAST185.132.32.0/22 IONOS DNSAS (eBGP DNS)}
			PTR	`ns.udag.net`
NS	`ns.udag.org`
		A	2607:f1c0:fe:53:185:132:34:253^{🇺🇸 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	`ns.udag.org`
		A	185.132.34.253^{🇩🇪 IONOS-ANYCAST185.132.32.0/22 IONOS DNSAS (eBGP DNS)}
			PTR	`ns.udag.org`
MX	`mx00.udag.de` ⭐
		A	62.146.106.39^{🇩🇪 IPX-AS1559862.146.104.0/22 NorthC Deutschland GmbH}
			PTR	`mx00.udag.de`
MX	`mx01.udag.de`⁽²⁰⁾
		A	62.146.106.40^{🇩🇪 IPX-AS1559862.146.104.0/22 NorthC Deutschland GmbH}
			PTR	`mx01.udag.de`
TXT	`v=spf1 include:_smtp.udag.de ~all`
SOA	`ns.udag.de`hostmaster@united-domains.de 2023-12-08 #5

`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=1786148354

Subdomains

mail.ref4ref.com

Same first word

ref4ref.com

DNS History

12 records (6 active, 6 former)

●NSns.udag.de2026-03-24 → 2026-08-08 · 3 obs

○ 2016-09-17 02:15:52
● 2026-03-24 20:22:48
● 2026-08-08 00:33:06

●NSns.udag.net2026-03-24 → 2026-08-08 · 3 obs

○ 2016-09-17 02:15:52
● 2026-03-24 20:22:48
● 2026-08-08 00:33:06

●NSns.udag.org2026-03-24 → 2026-08-08 · 3 obs

○ 2016-09-17 02:15:52
● 2026-03-24 20:22:48
● 2026-08-08 00:33:06

○NSns1.crowfoot.arvixe.com2015-08-17 → 2016-04-05 · 4 obs

● 2015-08-17 16:11:10
● 2016-04-05 20:34:52
○ 2016-09-17 02:15:52
○ 2026-08-08 00:33:06

○NSns2.crowfoot.arvixe.com2015-08-17 → 2016-04-05 · 4 obs

● 2015-08-17 16:11:10
● 2016-04-05 20:34:52
○ 2016-09-17 02:15:52
○ 2026-08-08 00:33:06

○MXmail.ref4ref.com2015-08-17 → 2016-04-05 · 4 obs

● 2015-08-17 16:11:10
● 2016-04-05 20:34:52
○ 2016-09-17 02:15:52
○ 2026-08-08 00:33:06

○MXmail2.ref4ref.com2015-08-17 → 2016-04-05 · 4 obs

● 2015-08-17 16:11:10
● 2016-04-05 20:34:52
○ 2016-09-17 02:15:52
○ 2026-08-08 00:33:06

●MXmx00.udag.de2026-03-24 → 2026-08-08 · 3 obs

○ 2016-09-17 02:15:52
● 2026-03-24 20:22:48
● 2026-08-08 00:33:06

●MXmx01.udag.de2026-03-24 → 2026-08-08 · 3 obs

○ 2016-09-17 02:15:52
● 2026-03-24 20:22:48
● 2026-08-08 00:33:06

○A143.95.251.452015-12-10 → 2016-04-05 · 5 obs

○ 2015-08-17 16:11:10
● 2015-12-10 02:54:20
● 2016-04-05 20:34:52
○ 2016-09-17 02:15:52
○ 2026-08-08 00:33:06

○A23.91.123.2042015-08-17 → 2015-08-17 · 3 obs

● 2015-08-17 16:11:10
○ 2015-12-10 02:54:20
○ 2026-08-08 00:33:06

●A89.31.143.902026-03-24 → 2026-08-08 · 3 obs

○ 2016-09-17 02:15:52
● 2026-03-24 20:22:48
● 2026-08-08 00:33:06

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
ref4ref.com	ns.udag.de, ns.udag.net, ns.udag.org	-

✅ Authoritative Response

Server:217.160.80.253

NS records: ns.udag.de, ns.udag.net, ns.udag.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for ref4ref.com (unsigned zone)

⏱️ Timing

Total: 336ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`89.31.143.90`
NS	3	`ns.udag.org, ns.udag.de...`
MX	2	`mx00.udag.de (pri: 10), mx01.udag.de (pri: 20)`
TXT	1	`v=spf1 include:_smtp.udag.de ~all`
SOA	1	`ns.udag.de hostmaster.united-domains.de`

Analysis

Hierarchy

The domain mail.ref4ref.com falls under the parent ref4ref.com.

IP Addresses

ref4ref.com resolves to one IP address: 89.31.143.90.

dds.gmbh, graysharon3.beep.com, amor-yoga.com and two other host names share IP numbers with ref4ref.com.

Name Servers

ref4ref.com is delegated to three name servers: ns.udag.de, ns.udag.net and ns.udag.org.

At least some of ref4ref.com's name servers are shared with other domains, for example titan-international.media, snap-buckle.com, froling.us and two more.

ns.udag.de, ns.udag.net and ns.udag.org each resolve to two IP addresses: ns.udag.de resolves to 217.160.80.253 and 2001:8d8:fe:53:217:160:80:253; ns.udag.net resolves to 185.132.33.253 and 2607:f1c0:fe:53:185:132:33:253; ns.udag.org resolves to 185.132.34.253 and 2607:f1c0:fe:53:185:132:34:253.

Mail Servers

Mail for ref4ref.com is handled by two mail servers — mx00.udag.de and mx01.udag.de.

ref4ref.com uses an identical mail server configuration to several other domains — among them hausundgrundbesitzer.tips, nidoco.com, galatasaray.at and two more.

Each of mx00.udag.de and mx01.udag.de has one IP address: mx00.udag.de uses 62.146.106.39 and mx01.udag.de uses 62.146.106.40.