mx.istmo.com.ar - robtex.com
mx.istmo.com.ar
| DNSSEC | ⚠️ Not signed | ||||||
| A | 201.251.13.24🇦🇷 AS27927201.251.13.0/24 LACNIC generated route for Telefonica de Argentina | ||||||
| PTR | smtpsrv1.cpenet.com.ar | ||||||
| A | 201.251.13.26🇦🇷 AS27927201.251.13.0/24 LACNIC generated route for Telefonica de Argentina | ||||||
istmo.com.ar
| DNSSEC | ⚠️ Not signed | ||||||
| NS | srvsr1 ⭐ ⚠️ Not in parent delegation | ||||||
| NS | ns1.cpesr.com.ar ⚠️ Not in zone NS records | ||||||
| NS | ns2.cpesr.com.ar ⚠️ Not in zone NS records | ||||||
| MX | mx.istmo.com.ar ⭐ | ||||||
| TXT | v=spf1 mx ~all | ||||||
| SOA | srvsr1admin serial=11 | ||||||
MX for
Same first word
Similar names
DNS History
2 records (2 active, 0 former)
●A201.251.13.242018-07-29 → 2026-05-15 · 2 obs
● 2018-07-29 09:45:38
● 2026-05-15 13:36:18
● 2026-05-15 13:36:18
●A201.251.13.262018-07-29 → 2026-05-15 · 2 obs
● 2018-07-29 09:45:38
● 2026-05-15 13:36:18
● 2026-05-15 13:36:18
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| ar | e.dns.ar, c.dns.ar, f.dns.ar, a.lactld.org... | 10 records |
| istmo.com.ar | ns1.cpesr.com.ar, ns2.cpesr.com.ar | 2 records |
✅ Authoritative Response
Server:201.251.13.4
NS records: ns1.cpesr.com.ar, ns2.cpesr.com.ar
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for istmo.com.ar (unsigned zone)
⏱️ Timing
Total: 2848ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 201.251.13.24, 201.251.13.26 |
📌 Glue Records Collected
Total: 12
In-bailiwick: 8 (f.dns.ar, e.dns.ar, d.dns.ar...)
Out-of-bailiwick: 4 (a.lactld.org, a.lactld.org, ns2.cpesr.com.ar...)
Analysis
Mail Server Role
mx.istmo.com.ar handles mail for istmo.com.ar.
IP Addresses
mx.istmo.com.ar points to two IP numbers: 201.251.13.24 and 201.251.13.26.
Other host names such as smtpsrv2.cpenet.com.ar, mx.marinelli.com.ar, mx.cpenet.com.ar, smtpsrv1.cpenet.com.ar and mx.cew.com.ar share IPs with mx.istmo.com.ar.