| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 81.91.86.14 | 900s | php7.web4u.cz | AS39790 | Web4U s.r.o. | 81.91.80.0/20 | 🇨🇿 Czechia | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 900s | mx1.mailchannels.net | 54.187.177.89 | ec2-54-187-177-89.us-west-2.compute.amazonaws.com | AS16509 Amazon.com, Inc. |
| 10 | 900s | mx2.mailchannels.net | 54.187.177.89 | ec2-54-187-177-89.us-west-2.compute.amazonaws.com | AS16509 Amazon.com, Inc. |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 81.91.86.14 |
| 🔶 Autoconfig | 81.91.86.14 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2001:1568::14 | 900s | php7.web4u.cz | AS39790 | Web4U s.r.o. | 2001:1568:0:0:0:0:0:0/32 | 🇨🇿 Czechia | — |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2025050500 |
| Primary NS (MNAME) | ns.web4u.cz |
| Responsible (RNAME) | admin@web4u.cz |
| Refresh | 10800s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 14400s |
| Scanned At | Duration | Records | DNSSEC | |
|---|---|---|---|---|
| 2026-08-27 15:14:17 | 3104ms | 2 NS 1 A 2 MX | 🔓 Insecure | View |
| 2026-06-26 20:42:27 | 8661ms | 2 NS 1 A 2 MX | 🔓 Insecure | View |
| 2026-06-23 04:13:30 | 1015ms | 0 NS 0 A 0 MX | ❓ Unknown | View |
| 2026-06-22 23:56:48 | 1114ms | 0 NS 0 A 0 MX | ❓ Unknown | View |
| 2026-06-22 14:04:06 | 1188ms | 0 NS 0 A 0 MX | ❓ Unknown | View |
| 2026-06-16 13:18:05 | 778ms | 2 NS 1 A 2 MX | 🔓 Insecure | View |