quangduc.org - robtex.com
quangduc.org
| DNSSEC | ⚠️ Not signed | ||||||
| NS | ns-1482.awsdns-57.org ⚠️ Not in zone NS records | ||||||
| A | 2600:9000:5305:ca00::1🇺🇸 Amazon2600:9000:5305::/48 - CloudFront | ||||||
| PTR | ns-1482.awsdns-57.org | ||||||
| A | 205.251.197.202🇺🇸 Amazon205.251.197.0/24 prefix | ||||||
| PTR | ns-1482.awsdns-57.org | ||||||
| NS | ns-1696.awsdns-20.co.uk ⚠️ Not in zone NS records | ||||||
| A | 2600:9000:5306:a000::1🇺🇸 Amazon2600:9000:5306::/48 - CloudFront | ||||||
| PTR | ns-1696.awsdns-20.co.uk | ||||||
| A | 205.251.198.160🇺🇸 Amazon205.251.198.0/24 prefix | ||||||
| PTR | ns-1696.awsdns-20.co.uk | ||||||
| NS | ns-236.awsdns-29.com ⚠️ Not in zone NS records | ||||||
| A | 2600:9000:5300:ec00::1🇺🇸 Amazon2600:9000:5300::/48 - CloudFront | ||||||
| PTR | ns-236.awsdns-29.com | ||||||
| A | 205.251.192.236🇺🇸 Amazon205.251.192.0/24 prefix | ||||||
| PTR | ns-236.awsdns-29.com | ||||||
| NS | ns-565.awsdns-06.net ⚠️ Not in zone NS records | ||||||
| A | 2600:9000:5302:3500::1🇺🇸 Amazon2600:9000:5302::/48 - CloudFront | ||||||
| PTR | ns-565.awsdns-06.net | ||||||
| A | 205.251.194.53🇺🇸 Amazon205.251.194.0/24 prefix | ||||||
| PTR | ns-565.awsdns-06.net | ||||||
org
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a0.org.afilias-nst.info ⭐ ⚠️ Not in parent delegation | ||||||
| NS | a2.org.afilias-nst.info ⚠️ Not in parent delegation | ||||||
| NS | b0.org.afilias-nst.org | ||||||
| NS | b2.org.afilias-nst.org | ||||||
| NS | c0.org.afilias-nst.info ⚠️ Not in parent delegation | ||||||
| NS | d0.org.afilias-nst.org | ||||||
| SOA | a0.org.afilias-nst.infohostmaster@donuts.email serial=1785343950 | ||||||
Same first word
Similar names
DNS History
12 records (4 active, 8 former)
●NSns-1482.awsdns-57.org2026-04-07 → 2026-07-29 · 3 obs
● 2026-04-07 23:27:28
● 2026-07-29 17:04:50
●NSns-1696.awsdns-20.co.uk2026-04-07 → 2026-07-29 · 3 obs
● 2026-04-07 23:27:28
● 2026-07-29 17:04:50
●NSns-236.awsdns-29.com2026-04-07 → 2026-07-29 · 3 obs
● 2026-04-07 23:27:28
● 2026-07-29 17:04:50
●NSns-565.awsdns-06.net2026-04-07 → 2026-07-29 · 3 obs
● 2026-04-07 23:27:28
● 2026-07-29 17:04:50
○NSns1.above.com2017-01-08 → 2017-01-08 · 4 obs
● 2017-01-08 15:26:02
○ 2026-04-07 23:27:28
○ 2026-07-29 17:04:50
○NSns2.above.com2017-01-08 → 2017-01-08 · 4 obs
● 2017-01-08 15:26:02
○ 2026-04-07 23:27:28
○ 2026-07-29 17:04:50
○NSns6101.hostgator.com2015-11-18 → 2016-02-11 · 4 obs
● 2016-02-11 03:56:42
○ 2016-05-02 04:12:12
○ 2026-07-29 17:04:50
○NSns6102.hostgator.com2015-11-18 → 2016-02-11 · 4 obs
● 2016-02-11 03:56:42
○ 2016-05-02 04:12:12
○ 2026-07-29 17:04:50
○MXmail.quangduc.org2015-11-18 → 2016-02-11 · 4 obs
● 2016-02-11 03:56:42
○ 2016-05-02 04:12:12
○ 2026-07-29 17:04:50
○A103.224.182.2412017-01-08 → 2017-01-08 · 4 obs
● 2017-01-08 15:26:02
○ 2026-04-07 23:27:28
○ 2026-07-29 17:04:50
○A192.232.249.1552015-11-18 → 2016-02-11 · 5 obs
● 2015-11-18 10:04:04
● 2016-02-11 03:56:42
○ 2016-05-02 04:12:12
○ 2026-07-29 17:04:50
○A50.87.144.682015-07-20 → 2015-07-20 · 3 obs
○ 2015-11-18 10:04:04
○ 2026-07-29 17:04:50
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| org | d0.org.afilias-nst.org, b0.org.afilias-nst.org, b2.org.afilias-nst.org | - |
| quangduc.org | ns-1482.awsdns-57.org, ns-236.awsdns-29.com, ns-565.awsdns-06.net, ns-1696.awsdns-20.co.uk | 2 records |
✅ Authoritative Response
Server:205.251.197.202
NS records: ns-1482.awsdns-57.org, ns-236.awsdns-29.com, ns-565.awsdns-06.net, ns-1696.awsdns-20.co.uk
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for quangduc.org (unsigned zone)
⏱️ Timing
Total: 482ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns-1482.awsdns-57.org, ns-1482.awsdns-57.org)
Analysis
Name Servers
The NS records for quangduc.org point to four name servers: ns-236.awsdns-29.com, ns-565.awsdns-06.net, ns-1482.awsdns-57.org and ns-1696.awsdns-20.co.uk.
quangduc.org shares at least some of its name servers with other domains, including supplierplus.com.ua, xoykhtrcgop.com, d1zm3b8976zm1y.cloudfront.net and two others.
The host names ns-236.awsdns-29.com, ns-565.awsdns-06.net, ns-1482.awsdns-57.org and ns-1696.awsdns-20.co.uk each resolve to two IP addresses: ns-236.awsdns-29.com resolves to 205.251.192.236 and 2600:9000:5300:ec00::1; ns-565.awsdns-06.net resolves to 205.251.194.53 and 2600:9000:5302:3500::1; ns-1482.awsdns-57.org resolves to 205.251.197.202 and 2600:9000:5305:ca00::1; ns-1696.awsdns-20.co.uk resolves to 205.251.198.160 and 2600:9000:5306:a000::1.