| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 192.30.252.153 | 43200s | lb-192-30-252-153-iad.github.com | AS36459 | GitHub, Inc. | 192.30.252.0/22 | 🇺🇸 United States | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 0 | 300s | . Null MX — domain accepts no email (RFC 7505) | |||
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026081301 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Scanned At | Duration | Records | DNSSEC | |
|---|---|---|---|---|
| 2026-08-25 19:24:19 | 528ms | 2 NS 1 A 1 MX | 🔒 Secure | View |
| 2026-08-14 05:20:00 | 637ms | 2 NS 1 A 1 MX | 🔒 Secure | View |
| 2026-07-29 22:50:05 | 4559ms | 2 NS 1 A 1 MX | 🔒 Secure | View |
| 2026-07-16 01:57:14 | 1037ms | 2 NS 1 A 1 MX | 🔒 Secure | View |
| 2026-06-27 23:44:05 | 1115ms | 2 NS 1 A 1 MX | 🔒 Secure | View |
| 2026-06-24 19:02:21 | 1449ms | 2 NS 1 A 1 MX | 🔒 Secure | View |
| 2026-06-21 09:58:00 | 730ms | 2 NS 1 A 1 MX | 🔒 Secure | View |
| 2026-06-20 18:07:59 | 1030ms | 0 NS 0 A 0 MX | ❓ Unknown | View |
| 2026-06-20 16:54:31 | 1087ms | 2 NS 1 A 1 MX | 🔒 Secure | View |
| 2026-06-17 06:10:57 | 318ms | 2 NS 1 A 0 MX | 🔒 Secure | View |