mailb1.mailrb2b.com - robtex.com
mailb1.mailrb2b.com
| DNSSEC | ⚠️ Not signed | ||||||
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 | 104.21.94.239Cloudflare104.21.80.0/20 , 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 ⭐ | ||||||
| NS | sonia.ns.cloudflare.com | ||||||
| MX | mailrb2b-com.mail.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=139, name=cloudflare-ech.com | ||||||
| SOA | nolan.ns.cloudflare.comdns@cloudflare.com serial=2399815705 | ||||||
Previously MX for
DNS History
2 records (0 active, 2 former)
○MXmailb1.mailrb2b.com2016-03-19 → 2016-09-10 · 3 obs
● 2016-03-19 00:26:10
● 2016-09-10 20:35:14
○ 2026-05-10 06:42:18
● 2016-09-10 20:35:14
○ 2026-05-10 06:42:18
○A192.34.56.2112015-08-19 → 2016-09-10 · 5 obs
● 2015-08-19 12:25:32
○ 2015-12-10 17:38:14
● 2016-03-19 00:26:10
● 2016-09-10 20:35:14
○ 2026-05-10 06:42:18
○ 2015-12-10 17:38:14
● 2016-03-19 00:26:10
● 2016-09-10 20:35:14
○ 2026-05-10 06:42:18
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.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: 84ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|
📌 Glue Records Collected
Total: 12
Out-of-bailiwick: 12 (sonia.ns.cloudflare.com, sonia.ns.cloudflare.com, sonia.ns.cloudflare.com...)