keio-observation-study.com - robtex.com
keio-observation-study.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 18.177.176.7🇯🇵 Amazon18.176.0.0/15 EC2 NRT prefix | ||||||
| PTR | ec2-18-177-176-7.ap-northeast-1.compute.amazonaws.com | ||||||
| A | 52.199.130.94🇯🇵 Amazon52.196.0.0/14 EC2 NRT prefix | ||||||
| NS | ns-231.awsdns-28.com ⭐ | ||||||
| A | 2600:9000:5300:e700::1🇺🇸 Amazon2600:9000:5300::/48 - CloudFront | ||||||
| PTR | ns-231.awsdns-28.com | ||||||
| A | 205.251.192.231🇺🇸 Amazon205.251.192.0/24 prefix | ||||||
| PTR | ns-231.awsdns-28.com | ||||||
| NS | ns-1275.awsdns-31.org | ||||||
| A | 2600:9000:5304:fb00::1🇺🇸 Amazon2600:9000:5304::/48 - CloudFront | ||||||
| PTR | ns-1275.awsdns-31.org | ||||||
| A | 205.251.196.251🇺🇸 Amazon205.251.196.0/24 prefix | ||||||
| PTR | ns-1275.awsdns-31.org | ||||||
| NS | ns-1832.awsdns-37.co.uk | ||||||
| A | 2600:9000:5307:2800::1🇺🇸 Amazon2600:9000:5307::/48 - CloudFront | ||||||
| PTR | ns-1832.awsdns-37.co.uk | ||||||
| A | 205.251.199.40🇺🇸 Amazon205.251.199.0/24 prefix | ||||||
| PTR | ns-1832.awsdns-37.co.uk | ||||||
| NS | ns-879.awsdns-45.net | ||||||
| A | 2600:9000:5303:6f00::1🇺🇸 Amazon2600:9000:5303::/48 - CloudFront | ||||||
| PTR | ns-879.awsdns-45.net | ||||||
| A | 205.251.195.111🇺🇸 Amazon205.251.195.0/24 prefix | ||||||
| PTR | ns-879.awsdns-45.net | ||||||
| SOA | ns-231.awsdns-28.comawsdns-hostmaster@amazon.com serial=1 | ||||||
com
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.gtld-servers.net ⭐ | ||||||
| NS | b.gtld-servers.net | ||||||
| NS | c.gtld-servers.net | ||||||
| NS | d.gtld-servers.net | ||||||
| NS | e.gtld-servers.net | ||||||
| NS | f.gtld-servers.net | ||||||
| NS | g.gtld-servers.net | ||||||
| NS | h.gtld-servers.net | ||||||
| NS | i.gtld-servers.net | ||||||
| NS | j.gtld-servers.net | ||||||
| NS | k.gtld-servers.net | ||||||
| NS | l.gtld-servers.net | ||||||
| NS | m.gtld-servers.net | ||||||
| SOA | a.gtld-servers.netnstld@verisign-grs.com serial=1778577641 | ||||||
Same first word
keio-observation-study.com |
DNS History
11 records (6 active, 5 former)
●NSns-1275.awsdns-31.org2026-02-17 → 2026-05-12 · 2 obs
● 2026-05-12 09:47:08
●NSns-1832.awsdns-37.co.uk2026-02-17 → 2026-05-12 · 2 obs
● 2026-05-12 09:47:08
●NSns-231.awsdns-28.com2026-02-17 → 2026-05-12 · 2 obs
● 2026-05-12 09:47:08
●NSns-879.awsdns-45.net2026-02-17 → 2026-05-12 · 2 obs
● 2026-05-12 09:47:08
○A13.192.59.452026-02-17 → 2026-02-17 · 3 obs
○ 2026-02-18 12:25:34
○ 2026-05-12 09:47:08
○A13.193.140.2472026-03-26 → 2026-03-26 · 3 obs
● 2026-03-26 14:35:18
○ 2026-05-12 09:47:08
●A18.177.176.72026-05-12 → 2026-05-12 · 2 obs
● 2026-05-12 09:47:08
○A18.181.73.2292026-02-17 → 2026-02-18 · 4 obs
● 2026-02-18 12:25:34
○ 2026-03-26 14:35:18
○ 2026-05-12 09:47:08
○A35.75.250.1672026-02-18 → 2026-02-18 · 4 obs
● 2026-02-18 12:25:34
○ 2026-03-26 14:35:18
○ 2026-05-12 09:47:08
●A52.199.130.942026-05-12 → 2026-05-12 · 2 obs
● 2026-05-12 09:47:08
○A54.199.98.582026-03-26 → 2026-03-26 · 3 obs
● 2026-03-26 14:35:18
○ 2026-05-12 09:47:08
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| keio-observation-study.com | ns-231.awsdns-28.com, ns-879.awsdns-45.net, ns-1832.awsdns-37.co.uk, ns-1275.awsdns-31.org | 2 records |
✅ Authoritative Response
Server:205.251.199.40
NS records: ns-231.awsdns-28.com, ns-879.awsdns-45.net, ns-1832.awsdns-37.co.uk, ns-1275.awsdns-31.org
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for keio-observation-study.com (unsigned zone)
⏱️ Timing
Total: 396ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 18.177.176.7, 52.199.130.94 |
| NS | 4 | ns-1275.awsdns-31.org, ns-1832.awsdns-37.co.uk... |
| SOA | 1 | ns-231.awsdns-28.com awsdns-hostmaster.a |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns-231.awsdns-28.com, ns-231.awsdns-28.com)
Analysis
IP Addresses
keio-observation-study.com resolves to two IP numbers: 18.177.176.7 and 52.199.130.94.
Name Servers
keio-observation-study.com is delegated to four name servers: ns-231.awsdns-28.com, ns-879.awsdns-45.net, ns-1275.awsdns-31.org and ns-1832.awsdns-37.co.uk.
keio-observation-study.com at least partially shares name servers with other domains, for instance prod.ap-southeast-3.vdi.fb.com, graphlist.dev, vanameyde.mobi, dwz5bpncpymtg.cloudfront.net and mediphany.com.
Host names with two IP numbers:
ns-231.awsdns-28.com points to 2600:9000:5300:e700::1 and 205.251.192.231; ns-879.awsdns-45.net points to 2600:9000:5303:6f00::1 and 205.251.195.111; ns-1275.awsdns-31.org points to 2600:9000:5304:fb00::1 and 205.251.196.251; ns-1832.awsdns-37.co.uk points to 2600:9000:5307:2800::1 and 205.251.199.40.