a1study.org - robtex.com
a1study.org
| DNSSEC | ⚠️ Not signed | ||||||
| A | 23.21.4.192🇺🇸 Amazon23.20.0.0/15 EC2 IAD prefix | ||||||
| PTR | ec2-23-21-4-192.compute-1.amazonaws.com | ||||||
| A | 44.207.205.237🇺🇸 Amazon44.192.0.0/11 EC2 IAD prefix | ||||||
| A | 54.87.189.107🇺🇸 Amazon54.87.0.0/16 EC2 IAD prefix | ||||||
| NS | ns-41.awsdns-05.com ⭐ | ||||||
| A | 2600:9000:5300:2900::1🇺🇸 Amazon2600:9000:5300::/48 - CloudFront | ||||||
| PTR | ns-41.awsdns-05.com | ||||||
| A | 205.251.192.41🇺🇸 Amazon205.251.192.0/24 prefix | ||||||
| PTR | ns-41.awsdns-05.com | ||||||
| NS | ns-1298.awsdns-34.org | ||||||
| A | 2600:9000:5305:1200::1🇺🇸 Amazon2600:9000:5305::/48 - CloudFront | ||||||
| PTR | ns-1298.awsdns-34.org | ||||||
| A | 205.251.197.18🇺🇸 Amazon205.251.197.0/24 prefix | ||||||
| PTR | ns-1298.awsdns-34.org | ||||||
| NS | ns-1754.awsdns-27.co.uk | ||||||
| A | 2600:9000:5306:da00::1🇺🇸 Amazon2600:9000:5306::/48 - CloudFront | ||||||
| PTR | ns-1754.awsdns-27.co.uk | ||||||
| A | 205.251.198.218🇺🇸 Amazon205.251.198.0/24 prefix | ||||||
| PTR | ns-1754.awsdns-27.co.uk | ||||||
| NS | ns-970.awsdns-57.net | ||||||
| A | 2600:9000:5303:ca00::1🇺🇸 Amazon2600:9000:5303::/48 - CloudFront | ||||||
| PTR | ns-970.awsdns-57.net | ||||||
| A | 205.251.195.202🇺🇸 Amazon205.251.195.0/24 prefix | ||||||
| PTR | ns-970.awsdns-57.net | ||||||
| SOA | ns-41.awsdns-05.comawsdns-hostmaster@amazon.com serial=1 | ||||||
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=1771291736 | ||||||
Same first word
DNS History
10 records (7 active, 3 former)
●NSns-1298.awsdns-34.org2026-03-01 → 2026-03-01 · 2 obs
● 2026-03-01 09:56:04
●NSns-1754.awsdns-27.co.uk2026-03-01 → 2026-03-01 · 2 obs
● 2026-03-01 09:56:04
●NSns-41.awsdns-05.com2026-03-01 → 2026-03-01 · 2 obs
● 2026-03-01 09:56:04
●NSns-970.awsdns-57.net2026-03-01 → 2026-03-01 · 2 obs
● 2026-03-01 09:56:04
○A100.27.134.1752026-03-01 → 2026-03-01 · 2 obs
○ 2026-03-01 09:56:04
●A23.21.4.1922026-03-01 → 2026-03-01 · 2 obs
● 2026-03-01 09:56:04
○A34.230.101.1702026-03-01 → 2026-03-01 · 2 obs
○ 2026-03-01 09:56:04
●A44.207.205.2372026-03-01 → 2026-03-01 · 2 obs
● 2026-03-01 09:56:04
○A52.71.6.742026-03-01 → 2026-03-01 · 2 obs
○ 2026-03-01 09:56:04
●A54.87.189.1072026-03-01 → 2026-03-01 · 2 obs
● 2026-03-01 09:56:04
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| org | b0.org.afilias-nst.org, b2.org.afilias-nst.org, d0.org.afilias-nst.org | - |
| a1study.org | ns-970.awsdns-57.net, ns-41.awsdns-05.com, ns-1754.awsdns-27.co.uk, ns-1298.awsdns-34.org | 1 record |
✅ Authoritative Response
Server: 205.251.192.41
NS records: ns-970.awsdns-57.net, ns-41.awsdns-05.com, ns-1754.awsdns-27.co.uk, ns-1298.awsdns-34.org
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for a1study.org (unsigned zone)
⏱️ Timing
Total: 307ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 3 | 98.90.217.191, 44.205.210.203... |
| NS | 4 | ns-1298.awsdns-34.org, ns-1754.awsdns-27.co.uk... |
| SOA | 1 | ns-41.awsdns-05.com awsdns-hostmaster.am |
📌 Glue Records Collected
Total: 1
Out-of-bailiwick: 1 (ns-1298.awsdns-34.org)
Analysis
IP Addresses
a1study.org points to three IPs: 23.21.4.192, 44.207.205.237 and 54.87.189.107.
Other host names such as ec2-44-207-205-237.compute-1.amazonaws.com and d-ndciv2dh2c.execute-api.us-east-1.amazonaws.com share IP numbers with a1study.org.
Name Servers
a1study.org is delegated to four name servers: ns-41.awsdns-05.com, ns-970.awsdns-57.net, ns-1298.awsdns-34.org and ns-1754.awsdns-27.co.uk.
a1study.org at least partially shares name servers with other domains, for instance cmeri.org, credocourseware.com, netgear.com.hk, frans.com and duphalac.pt.
these name servers are often used together with ns-43.awsdns-05.com, ns-666.awsdns-19.net, ns-1092.awsdns-08.org and ns-1940.awsdns-50.co.uk.
Host names with two IP numbers:
ns-41.awsdns-05.com points to 2600:9000:5300:2900::1 and 205.251.192.41; ns-970.awsdns-57.net points to 2600:9000:5303:ca00::1 and 205.251.195.202; ns-1298.awsdns-34.org points to 2600:9000:5305:1200::1 and 205.251.197.18; ns-1754.awsdns-27.co.uk points to 2600:9000:5306:da00::1 and 205.251.198.218.