`mailserver.rubygrand.com`

	DNSSEC	⚠️ Not signed
	A	2600:1008:a01b:d0a5:206d:6df4:ad91:5d98^{🇺🇸 AS61672600:1008:a010::/44 Verizon Business}
	A	138.199.2.51^{🇺🇸 CDN77138.199.2.0/23 ATL}

`rubygrand.com`

	DNSSEC	⚠️ Not signed
	A	2600:1008:a01b:d0a5:206d:6df4:ad91:5d98^{🇺🇸 AS61672600:1008:a010::/44 Verizon Business}
	A	138.199.2.51^{🇺🇸 CDN77138.199.2.0/23 ATL}
	NS	`ns1.dynu.com` ⭐
	NS	`ns2.dynu.com`
	NS	`ns3.dynu.com`
	NS	`ns4.dynu.com`
	NS	`ns5.dynu.com`
	NS	`ns6.dynu.com`
	MX	`mail.rubygrand.com` ⭐
	SOA	`ns1.dynu.com`administrator@dynu.com serial=1032

Previously MX for

rubygrand.com

Same first word

mailserver.bid

mailserver.systems

mailserver.tokyo

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mailserver.dyndns.biz

mailserver.id

mailserver.cn

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mailserver.dns-cloud.net

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mailserver.co.kr

mailserver.dyndns.tv

mailserver.cologne

mailserver.name

mailserver.s3.nl-ams.scw.cloud

mailserver.vn

mailserver.pro

mailserver.ca

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mailserver.delivery

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mailserver.work

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mailserver.from-de.com

mailserver.ne.jp

mailserver.no

mailserver.com.my

mailserver.co

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mailserver.rocks

mailserver.nf

mailserver.vg

Similar names

DNS History

18 records (2 active, 16 former)

○NSns1.namebrightdns.com2015-05-31 → 2016-08-08 · 6 obs

● 2015-05-31 00:10:36
● 2015-10-16 13:24:06
○ 2015-12-30 13:48:50
● 2016-03-26 20:45:20
● 2016-08-08 06:11:38
○ 2026-04-24 07:07:58

○NSns2.namebrightdns.com2015-10-16 → 2016-08-08 · 4 obs

○ 2015-05-31 00:10:36
● 2015-10-16 13:24:06
● 2016-08-08 06:11:38
○ 2026-04-24 07:07:58

○NSnsg1.namebrightdns.com2015-05-31 → 2016-08-08 · 6 obs

● 2015-05-31 00:10:36
○ 2015-10-16 13:24:06
○ 2015-12-30 13:48:50
● 2016-03-26 20:45:20
● 2016-08-08 06:11:38
○ 2026-04-24 07:07:58

○NSnsg2.namebrightdns.com2015-05-31 → 2016-08-08 · 5 obs

● 2015-05-31 00:10:36
○ 2015-10-16 13:24:06
● 2015-12-30 13:48:50
● 2016-08-08 06:11:38
○ 2026-04-24 07:07:58

○MXanmail.namebrightmail.com2015-05-31 → 2015-05-31 · 3 obs

● 2015-05-31 00:10:36
○ 2015-10-16 13:24:06
○ 2026-04-24 07:07:58

○A107.23.160.2182015-12-30 → 2015-12-30 · 4 obs

○ 2015-10-16 13:24:06
● 2015-12-30 13:48:50
○ 2016-03-26 20:45:20
○ 2026-04-24 07:07:58

○A107.23.198.2402016-08-08 → 2016-08-08 · 3 obs

○ 2016-03-26 20:45:20
● 2016-08-08 06:11:38
○ 2026-04-24 07:07:58

●A138.199.2.512026-04-24 → 2026-04-24 · 2 obs

○ 2016-08-08 06:11:38
● 2026-04-24 07:07:58

●A2600:1008:a01b:d0a5:206d:6df4:ad91:5d982026-04-24 → 2026-04-24 · 2 obs

○ 2016-08-08 06:11:38
● 2026-04-24 07:07:58

○A52.206.43.2342016-08-08 → 2016-08-08 · 3 obs

○ 2016-03-26 20:45:20
● 2016-08-08 06:11:38
○ 2026-04-24 07:07:58

○A52.21.180.2332016-03-26 → 2016-03-26 · 4 obs

○ 2015-12-30 13:48:50
● 2016-03-26 20:45:20
○ 2016-08-08 06:11:38
○ 2026-04-24 07:07:58

○A52.3.120.902016-03-26 → 2016-03-26 · 4 obs

○ 2015-12-30 13:48:50
● 2016-03-26 20:45:20
○ 2016-08-08 06:11:38
○ 2026-04-24 07:07:58

○A52.4.72.1372016-08-08 → 2016-08-08 · 3 obs

○ 2016-03-26 20:45:20
● 2016-08-08 06:11:38
○ 2026-04-24 07:07:58

○A54.174.31.2542015-05-31 → 2015-10-16 · 4 obs

● 2015-05-31 00:10:36
● 2015-10-16 13:24:06
○ 2015-12-30 13:48:50
○ 2026-04-24 07:07:58

○A54.208.74.2152015-05-31 → 2015-10-16 · 4 obs

● 2015-05-31 00:10:36
● 2015-10-16 13:24:06
○ 2015-12-30 13:48:50
○ 2026-04-24 07:07:58

○A54.209.90.812015-12-30 → 2015-12-30 · 4 obs

○ 2015-10-16 13:24:06
● 2015-12-30 13:48:50
○ 2016-03-26 20:45:20
○ 2026-04-24 07:07:58

○A54.236.123.2242016-08-08 → 2016-08-08 · 3 obs

○ 2016-03-26 20:45:20
● 2016-08-08 06:11:38
○ 2026-04-24 07:07:58

○CNAMEhdredirect-lb-399551664.us-east-1.elb.amazonaws.com2015-05-31 → 2016-08-08 · 3 obs

● 2015-05-31 00:10:36
● 2016-08-08 06:11:38
○ 2026-04-24 07:07:58

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	i.gtld-servers.net, m.gtld-servers.net, c.gtld-servers.net, g.gtld-servers.net...	-
rubygrand.com	ns1.dynu.com, ns2.dynu.com, ns3.dynu.com, ns4.dynu.com...	11 records

✅ Authoritative Response

Server:72.51.58.2

NS records: ns1.dynu.com, ns2.dynu.com, ns3.dynu.com, ns4.dynu.com, ns5.dynu.com, ns6.dynu.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for rubygrand.com (unsigned zone)

⏱️ Timing

Total: 605ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`138.199.2.51`
AAAA	1	`2600:1008:a01b:d0a5:206d:6df4:ad91:5d98`

📌 Glue Records Collected

Total: 11

Out-of-bailiwick: 11 (ns1.dynu.com, ns2.dynu.com, ns2.dynu.com...)

Analysis

IP Addresses

mailserver.rubygrand.com resolves to two IP numbers: 2600:1008:a01b:d0a5:206d:6df4:ad91:5d98 and 138.199.2.51.

Other host names, for instance mintro.org, mail.rubygrand.com and rubygrand.com share IP numbers with mailserver.rubygrand.com.

mailserver.rubygrand.com - robtex.com