`mailrb2b.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3030::ac43:8d9e^{🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3031::6815:5eef^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.94.239^{Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.141.158^{🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`nolan.ns.cloudflare.com` ⭐
		A	2606:4700:58::a29f:2c38^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`nolan.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c338^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`nolan.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2338^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`nolan.ns.cloudflare.com`
		A	108.162.195.56^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`nolan.ns.cloudflare.com`
		A	162.159.44.56^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`nolan.ns.cloudflare.com`
		A	172.64.35.56^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`nolan.ns.cloudflare.com`
NS	`sonia.ns.cloudflare.com`
		A	2606:4700:50::a29f:26be^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sonia.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c2be^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`sonia.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:22be^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`sonia.ns.cloudflare.com`
		A	108.162.194.190^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sonia.ns.cloudflare.com`
		A	162.159.38.190^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sonia.ns.cloudflare.com`
		A	172.64.34.190^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sonia.ns.cloudflare.com`
MX	`mailrb2b-com.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:c927::^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-bn6pr21cu00500.inbound.protection.outlook.com`
		A	2a01:111:f403:c927::1^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-bn8pr05cu00301.inbound.protection.outlook.com`
		A	2a01:111:f403:c946::4^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-ch0pr04cu00504.inbound.protection.outlook.com`
		A	2a01:111:f403:f804::2^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-co1pr05cu00402.inbound.protection.outlook.com`
		A	52.101.10.6^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-bn1pr21cu00106.inbound.protection.outlook.com`
		A	52.101.10.8^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-bn1pr04cu00100.inbound.protection.outlook.com`
		A	52.101.10.18^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-bn8pr05cu00302.inbound.protection.outlook.com`
		A	52.101.194.17^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-ch5pr02cu00401.inbound.protection.outlook.com`
TXT	`MS=ms56710371`
TXT	`v=spf1 include:spf.protection.outlook.com ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.94.239, 172.67.141.158
		IPv6 hints	2606:4700:3030::ac43:8d9e, 2606:4700:3031::6815:5eef
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=159, name=cloudflare-ech.com
SOA	`nolan.ns.cloudflare.com`dns@cloudflare.com serial=2399815705

`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=1778375186

Previously MX for

mailrb2b.com

Same first word

mailrb2b.com

DNS History

30 records (7 active, 23 former)

○NSdns1.name-services.com2017-02-12 → 2017-02-12 · 4 obs

○ 2016-06-26 03:15:24
● 2017-02-12 23:00:52
○ 2020-02-04 10:09:26
○ 2026-05-10 01:16:50

○NSdns1.registrar-servers.com2016-06-26 → 2016-06-26 · 4 obs

○ 2015-12-03 04:17:26
● 2016-06-26 03:15:24
○ 2017-02-12 23:00:52
○ 2026-05-10 01:16:50

○NSdns2.name-services.com2017-02-12 → 2017-02-12 · 4 obs

○ 2016-06-26 03:15:24
● 2017-02-12 23:00:52
○ 2020-02-04 10:09:26
○ 2026-05-10 01:16:50

○NSdns2.registrar-servers.com2016-06-26 → 2016-06-26 · 4 obs

○ 2015-12-03 04:17:26
● 2016-06-26 03:15:24
○ 2017-02-12 23:00:52
○ 2026-05-10 01:16:50

○NSdns3.name-services.com2017-02-12 → 2017-02-12 · 4 obs

○ 2016-06-26 03:15:24
● 2017-02-12 23:00:52
○ 2020-02-04 10:09:26
○ 2026-05-10 01:16:50

○NSdns3.registrar-servers.com2016-06-26 → 2016-06-26 · 4 obs

○ 2015-12-03 04:17:26
● 2016-06-26 03:15:24
○ 2017-02-12 23:00:52
○ 2026-05-10 01:16:50

○NSdns4.name-services.com2017-02-12 → 2017-02-12 · 4 obs

○ 2016-06-26 03:15:24
● 2017-02-12 23:00:52
○ 2020-02-04 10:09:26
○ 2026-05-10 01:16:50

○NSdns4.registrar-servers.com2016-06-26 → 2016-06-26 · 4 obs

○ 2015-12-03 04:17:26
● 2016-06-26 03:15:24
○ 2017-02-12 23:00:52
○ 2026-05-10 01:16:50

○NSdns5.name-services.com2017-02-12 → 2017-02-12 · 4 obs

○ 2016-06-26 03:15:24
● 2017-02-12 23:00:52
○ 2020-02-04 10:09:26
○ 2026-05-10 01:16:50

○NSdns5.registrar-servers.com2016-06-26 → 2016-06-26 · 4 obs

○ 2015-12-03 04:17:26
● 2016-06-26 03:15:24
○ 2017-02-12 23:00:52
○ 2026-05-10 01:16:50

●NSnolan.ns.cloudflare.com2026-04-06 → 2026-05-10 · 3 obs

○ 2020-02-04 10:09:26
● 2026-04-06 13:11:16
● 2026-05-10 01:16:50

○NSns1.mailrb2b.com2020-02-04 → 2020-02-04 · 4 obs

○ 2017-02-12 23:00:52
● 2020-02-04 10:09:26
○ 2026-04-06 13:11:16
○ 2026-05-10 01:16:50

○NSns1dhq.name.com2015-08-04 → 2015-08-04 · 3 obs

● 2015-08-04 17:37:28
○ 2015-12-03 04:17:26
○ 2026-05-10 01:16:50

○NSns2.mailrb2b.com2020-02-04 → 2020-02-04 · 4 obs

○ 2017-02-12 23:00:52
● 2020-02-04 10:09:26
○ 2026-04-06 13:11:16
○ 2026-05-10 01:16:50

○NSns2dky.name.com2015-08-04 → 2015-08-04 · 3 obs

● 2015-08-04 17:37:28
○ 2015-12-03 04:17:26
○ 2026-05-10 01:16:50

○NSns3cjl.name.com2015-08-04 → 2015-08-04 · 3 obs

● 2015-08-04 17:37:28
○ 2015-12-03 04:17:26
○ 2026-05-10 01:16:50

○NSns4cfn.name.com2015-08-04 → 2015-08-04 · 3 obs

● 2015-08-04 17:37:28
○ 2015-12-03 04:17:26
○ 2026-05-10 01:16:50

●NSsonia.ns.cloudflare.com2026-04-06 → 2026-05-10 · 3 obs

○ 2020-02-04 10:09:26
● 2026-04-06 13:11:16
● 2026-05-10 01:16:50

○MXm2x.mailrb2b.com2015-08-04 → 2015-08-04 · 3 obs

● 2015-08-04 17:37:28
○ 2015-12-03 04:17:26
○ 2026-05-10 01:16:50

○MXmailb1.mailrb2b.com2015-08-04 → 2015-08-04 · 3 obs

● 2015-08-04 17:37:28
○ 2015-12-03 04:17:26
○ 2026-05-10 01:16:50

●MXmailrb2b-com.mail.protection.outlook.com2026-04-06 → 2026-05-10 · 3 obs

○ 2020-02-04 10:09:26
● 2026-04-06 13:11:16
● 2026-05-10 01:16:50

○MXmailrb2b.com2020-02-04 → 2020-02-04 · 4 obs

○ 2015-12-03 04:17:26
● 2020-02-04 10:09:26
○ 2026-04-06 13:11:16
○ 2026-05-10 01:16:50

○MXpost.mailrb2b.com2015-08-04 → 2015-08-04 · 3 obs

● 2015-08-04 17:37:28
○ 2015-12-03 04:17:26
○ 2026-05-10 01:16:50

○MXsmtp.mailrb2b.com2015-08-04 → 2015-08-04 · 3 obs

● 2015-08-04 17:37:28
○ 2015-12-03 04:17:26
○ 2026-05-10 01:16:50

●A104.21.94.2392026-04-06 → 2026-05-10 · 3 obs

○ 2020-02-04 10:09:26
● 2026-04-06 13:11:16
● 2026-05-10 01:16:50

○A167.71.91.2552020-02-04 → 2020-02-04 · 4 obs

○ 2017-02-12 23:00:52
● 2020-02-04 10:09:26
○ 2026-04-06 13:11:16
○ 2026-05-10 01:16:50

●A172.67.141.1582026-04-06 → 2026-05-10 · 3 obs

○ 2020-02-04 10:09:26
● 2026-04-06 13:11:16
● 2026-05-10 01:16:50

●A2606:4700:3030::ac43:8d9e2026-04-06 → 2026-05-10 · 3 obs

○ 2020-02-04 10:09:26
● 2026-04-06 13:11:16
● 2026-05-10 01:16:50

●A2606:4700:3031::6815:5eef2026-04-06 → 2026-05-10 · 3 obs

○ 2020-02-04 10:09:26
● 2026-04-06 13:11:16
● 2026-05-10 01:16:50

○A8.5.1.492017-02-12 → 2017-02-12 · 3 obs

● 2017-02-12 23:00:52
○ 2020-02-04 10:09:26
○ 2026-05-10 01:16:50

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	h.gtld-servers.net, j.gtld-servers.net, d.gtld-servers.net, f.gtld-servers.net...	-
mailrb2b.com	sonia.ns.cloudflare.com, nolan.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.195.56

NS records: sonia.ns.cloudflare.com, nolan.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for mailrb2b.com (unsigned zone)

⏱️ Timing

Total: 216ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.141.158, 104.21.94.239`
AAAA	2	`2606:4700:3031::6815:5eef, 2606:4700:3030::ac43:8d9e`
NS	2	`nolan.ns.cloudflare.com, sonia.ns.cloudflare.com`
MX	1	`mailrb2b-com.mail.protection.outlook.com`
TXT	2	`MS=ms56710371, v=spf1 include:spf.protection.outlook.co`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`nolan.ns.cloudflare.com dns.cloudflare.c`

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (sonia.ns.cloudflare.com, sonia.ns.cloudflare.com, sonia.ns.cloudflare.com...)

Analysis

IP Addresses

mailrb2b.com resolves to four IP numbers: 2606:4700:3030::ac43:8d9e, 2606:4700:3031::6815:5eef, 104.21.94.239 and 172.67.141.158.

other host names for instance www.corporate-office-au.com, www.recruitmenttrust.com, uweb.be, slwky39.riwwippookjok.com and zoumboulakis.gr share IP numbers with mailrb2b.com.

Name Servers

mailrb2b.com is delegated to two name servers: nolan.ns.cloudflare.com and sonia.ns.cloudflare.com.

mailrb2b.com shares the same name server setup as other domains, for example easeagencyofficemanager.com, ourmedicalhome.org, greendaymortgage.net, hcimedicaloffice.com and perfectfranchiseoffice.com.

mailrb2b.com at least partially shares name servers with other domains, for instance 72tk.net, skycomms.com.au, 4554.xyz, indresden.net and officehometechx.com.

These name servers are commonly used with the name servers adam.ns.cloudflare.com.

Host names with six IP numbers:

nolan.ns.cloudflare.com points to: 2606:4700:58::a29f:2c38, 2803:f800:50::6ca2:c338, 2a06:98c1:50::ac40:2338, 108.162.195.56, 162.159.44.56 and 172.64.35.56; sonia.ns.cloudflare.com points to: 2606:4700:50::a29f:26be, 2803:f800:50::6ca2:c2be, 2a06:98c1:50::ac40:22be, 108.162.194.190, 162.159.38.190 and 172.64.34.190.

Mail Servers

mailrb2b.com is handled by a single mail server, mailrb2b-com.mail.protection.outlook.com.

Host name mailrb2b-com.mail.protection.outlook.com points to eight IP numbers: 2a01:111:f403:c927::, 2a01:111:f403:c927::1, 2a01:111:f403:c946::4, 2a01:111:f403:f804::2, 52.101.10.6, 52.101.10.8, 52.101.10.18 and 52.101.194.17.

mailrb2b.com - robtex.com

mailrb2b.com

com

Previously MX for

Same first word

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

IP Addresses

Name Servers

Mail Servers

`mailrb2b.com`

`com`