excel.mastery.com.bd - robtex.com
excel.mastery.com.bd
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:3036::ac43:967a🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 2606:4700:3037::6815:6018🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 104.21.96.24Cloudflare104.21.96.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 172.67.150.122🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| MX | mx1.emailsrvr.com ⭐ | ||||||
| A | 173.203.187.1🇺🇸 RACKSPACE-IAD173.203.128.0/18 Rackspace Managed Hosting, 9725 Data point drive, Suite 100, San Antonio, TX 78229 | ||||||
| PTR | mx1.emailsrvr.com | ||||||
| MX | mx2.emailsrvr.com(20) | ||||||
| A | 173.203.187.2🇺🇸 RACKSPACE-IAD173.203.128.0/18 Rackspace Managed Hosting, 9725 Data point drive, Suite 100, San Antonio, TX 78229 | ||||||
| PTR | mx2.emailsrvr.com | ||||||
| TXT | v=spf1 a mx include:_spf.elasticemail.com include:emailsrvr.com ~all | ||||||
| HTTPS | HTTP/3, HTTP/2 ✓ hints match | ||||||
| IPv4 hints | 104.21.96.24, 172.67.150.122 | ||||||
| IPv6 hints | 2606:4700:3036::ac43:967a, 2606:4700:3037::6815:6018 | ||||||
| ECH | X25519, HKDF-SHA256 + AES-128-GCM draft, id=25, name=cloudflare-ech.com | ||||||
mastery.com.bd
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:3036::ac43:967a🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 2606:4700:3037::6815:6018🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 104.21.96.24Cloudflare104.21.96.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 172.67.150.122🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| NS | aida.ns.cloudflare.com ⭐ | ||||||
| NS | brian.ns.cloudflare.com | ||||||
| MX | mx1.emailsrvr.com ⭐ | ||||||
| MX | mx2.emailsrvr.com(20) | ||||||
| TXT | _dmarc
Value: v=DMARC1; p=none; | ||||||
| TXT | v=spf1 a mx include:_spf.elasticemail.com include:emailsrvr.com -all | ||||||
| HTTPS | HTTP/3, HTTP/2 ✓ hints match | ||||||
| IPv4 hints | 104.21.96.24, 172.67.150.122 | ||||||
| IPv6 hints | 2606:4700:3036::ac43:967a, 2606:4700:3037::6815:6018 | ||||||
| ECH | X25519, HKDF-SHA256 + AES-128-GCM draft, id=25, name=cloudflare-ech.com | ||||||
| SOA | aida.ns.cloudflare.comdns@cloudflare.com serial=2399604497 | ||||||
Same first word
Similar names
DNS History
6 records (6 active, 0 former)
●MXmx1.emailsrvr.com2026-03-19 → 2026-04-13 · 2 obs
● 2026-04-13 00:04:44
●MXmx2.emailsrvr.com2026-03-19 → 2026-04-13 · 2 obs
● 2026-04-13 00:04:44
●A104.21.96.242026-03-19 → 2026-04-13 · 2 obs
● 2026-04-13 00:04:44
●A172.67.150.1222026-03-19 → 2026-04-13 · 2 obs
● 2026-04-13 00:04:44
●A2606:4700:3036::ac43:967a2026-03-19 → 2026-04-13 · 2 obs
● 2026-04-13 00:04:44
●A2606:4700:3037::6815:60182026-03-19 → 2026-04-13 · 2 obs
● 2026-04-13 00:04:44
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| bd | dns.bd, surma.btcl.net.bd, bd-ns.anycast.pch.net, jamuna.btcl.net.bd | 8 records |
| mastery.com.bd | aida.ns.cloudflare.com, brian.ns.cloudflare.com | - |
✅ Authoritative Response
Server:173.245.58.58
NS records: aida.ns.cloudflare.com, brian.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for mastery.com.bd (unsigned zone)
⏱️ Timing
Total: 1117ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 172.67.150.122, 104.21.96.24 |
| AAAA | 2 | 2606:4700:3036::ac43:967a, 2606:4700:3037::6815:6018 |
| MX | 2 | mx1.emailsrvr.com (pri: 10), mx2.emailsrvr.com (pri: 20) |
| TXT | 1 | v=spf1 a mx include:_spf.elasticemail.co |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h3", |
📌 Glue Records Collected
Total: 8
In-bailiwick: 6 (jamuna.btcl.net.bd, surma.btcl.net.bd, dns.bd...)
Out-of-bailiwick: 2 (bd-ns.anycast.pch.net, bd-ns.anycast.pch.net)
Analysis
IP Addresses
excel.mastery.com.bd points to four IP numbers: 2606:4700:3036::ac43:967a, 2606:4700:3037::6815:6018, 104.21.96.24 and 172.67.150.122.
Other host names, for instance www.masterit.hu, casinoxnation.us, innovaxp.com, e-svip.com and vectorlegal.com share IP numbers with excel.mastery.com.bd.
Mail Servers
Two mail servers mx1.emailsrvr.com and mx2.emailsrvr.com handle excel.mastery.com.bd.
excel.mastery.com.bd uses the same mail server setup as other domains such as i-trenink.com, soytek.com, drmarkberman.com, heros.zzn.com and mmpeb.com.
excel.mastery.com.bd shares mail servers with other domains at least in part, for instance helba.gr, joemyarsmotors.com and vmsae.com.
Host names with a single IP:
mx1.emailsrvr.com resolves to 173.203.187.1.
mx2.emailsrvr.com resolves to 173.203.187.2.