| 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 | — |
| 192.30.252.154 | 43200s | lb-192-30-252-154-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 | 2026081201 |
| 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 | |
|---|---|---|---|---|
| 2026-09-01 14:47:33 | 572ms | 2 NS 2 A 1 MX | 🔒 Secure | View |
| 2026-08-25 11:54:14 | 2424ms | 2 NS 2 A 1 MX | 🔒 Secure | View |
| 2026-08-12 14:08:29 | 1353ms | 2 NS 2 A 1 MX | 🔒 Secure | View |
| 2026-07-19 09:16:24 | 770ms | 2 NS 2 A 1 MX | 🔒 Secure | View |
| 2026-07-14 23:05:14 | 682ms | 2 NS 2 A 1 MX | 🔒 Secure | View |
| 2026-06-26 07:42:41 | 1619ms | 2 NS 2 A 1 MX | 🔒 Secure | View |
| 2026-06-17 15:39:57 | 2454ms | 2 NS 2 A 0 MX | 🔒 Secure | View |